318
KOHMAN T. ARAKAWA
1. Nucula hanleyi Winckworth
“ Seven longitudinal ridges as in N . nitida, but more prominent and
with the grooves more deeply cut . . . sometimes more deeply than
shown in the figure and even so much so as to allow the ridges to be
split off separately.” (Moore, 1931a, p. 361 .) (Pellet-type 11-7a.)
Remarks: The pellets of this species have been described by Moore
(1931a) under the name of N . radiata Forbes and Hanley.
2. N . moorei Winckworth (Fig. 313)
‘‘ Only five longitudinal ridges, but they are of the nitida type, with
the lateral and ventro-lateral ridges fused to form one broad ridge ; the
grooves are shallow and the ventral ridge slightly sunk as in N . nitida.”
(Moore, 1931a, p. 361, Fig. 412.) (Pellet-type 11-7.)
Remarks: The pellets of this species have been described by Moore
(1931a) under the name of N . nitida var. radiata Marshall.
3. N . nucleus (LinnB) (Fig. 3 ~ )
“ Seven longitudinal ridges as in N . nitida, but more prominent and
with the grooves more deeply cut . . . sometimes more deeply than
shown in the figure and even so much so as to allow the ridges to be
split off separately.” (Moore, 1931a, p. 361, Fig. 3 and Fig. 4 D and F.)
(Pellet-type 11-7a.)
4. N . sulcata Bronn (Fig. 3n)
“ Nine longitudinal ridges, separated by grooves of medium depth ;
the ventral ridge deeply sunk as in Nucula nucleus.” (Moore, 1931a,
p. 362, Fig. 4E.) (Pellet-type 11-7b.)
5 . N . tenuis (Montagu)
‘‘ Five very prominent equal longitudinal ridges : all the grooves
are deeply cut, and the ventral pair are the most open.’’ (Moore, 1931a,
p. 361, Fig. 4A.) (Pellet-type 11-7.)
6. N . turgida Leckenby and Marshall (Fig. 3 ~ )
“ Seven longitudinal ridges, the ventral one being smaller and sunk
between the two on either side ; none of the grooves are deeply cut, and
in a rubbed or dirty pellet they may appear to be absent.” (Moore,
1931a, p. 361, Fig. 4B.) (Pellet-type 11-7a.)
Remarks: The pellets of this species have been described by Moore
(1931a) under the name of N . nitida Forbes and Hanley.
KOHMAN T. ARAKAWA
1. Nucula hanleyi Winckworth
“ Seven longitudinal ridges as in N . nitida, but more prominent and
with the grooves more deeply cut . . . sometimes more deeply than
shown in the figure and even so much so as to allow the ridges to be
split off separately.” (Moore, 1931a, p. 361 .) (Pellet-type 11-7a.)
Remarks: The pellets of this species have been described by Moore
(1931a) under the name of N . radiata Forbes and Hanley.
2. N . moorei Winckworth (Fig. 313)
‘‘ Only five longitudinal ridges, but they are of the nitida type, with
the lateral and ventro-lateral ridges fused to form one broad ridge ; the
grooves are shallow and the ventral ridge slightly sunk as in N . nitida.”
(Moore, 1931a, p. 361, Fig. 412.) (Pellet-type 11-7.)
Remarks: The pellets of this species have been described by Moore
(1931a) under the name of N . nitida var. radiata Marshall.
3. N . nucleus (LinnB) (Fig. 3 ~ )
“ Seven longitudinal ridges as in N . nitida, but more prominent and
with the grooves more deeply cut . . . sometimes more deeply than
shown in the figure and even so much so as to allow the ridges to be
split off separately.” (Moore, 1931a, p. 361, Fig. 3 and Fig. 4 D and F.)
(Pellet-type 11-7a.)
4. N . sulcata Bronn (Fig. 3n)
“ Nine longitudinal ridges, separated by grooves of medium depth ;
the ventral ridge deeply sunk as in Nucula nucleus.” (Moore, 1931a,
p. 362, Fig. 4E.) (Pellet-type 11-7b.)
5 . N . tenuis (Montagu)
‘‘ Five very prominent equal longitudinal ridges : all the grooves
are deeply cut, and the ventral pair are the most open.’’ (Moore, 1931a,
p. 361, Fig. 4A.) (Pellet-type 11-7.)
6. N . turgida Leckenby and Marshall (Fig. 3 ~ )
“ Seven longitudinal ridges, the ventral one being smaller and sunk
between the two on either side ; none of the grooves are deeply cut, and
in a rubbed or dirty pellet they may appear to be absent.” (Moore,
1931a, p. 361, Fig. 4B.) (Pellet-type 11-7a.)
Remarks: The pellets of this species have been described by Moore
(1931a) under the name of N . nitida Forbes and Hanley.