9
A
FIG. 4. Pacific forms of Stylocheiron afine in lateral aspect (not showing antennae or
thoracic and abdominal appendages), and male copulatory organs (inner and
median lobes) showing differences that cannot, at present, be regarded as significant.
ssp., spine-shaped process ; tp., terminal process ; pp., proximal process;
Ip., lateral process ; a,b, “ California Current Form ” (petasma of specimen 6.8 mm
long) ; c,d, “ East Equatorial Form ” (petasma of specimen 7 mm long) ; e,f, “ West
Equatorial Form ” (petasmae of specimens 6.8 and 7.0 mm long); g,h, “ Central
Form ” (petasmae of specimens 7.2 and 7.0 mm long) ; i,j, ‘‘ Indo-Australian Form ”
(petasmae of specimens 5.8 and 6.8 mm long) ; k, Stylocheiron insulare; 1, generalized
lateral view of sixth abdominal segment and eye of “8. longicorne group ” species
showing parts measured in distinguishing the forms : L, length of sixth abdominal
segment; D, depth of sixth abdominal segment; A, width of upper eye at distal
limit of last complete row of enlarged cones ; B, width of widest part of lower eye.
(After Brinton, 1962a.)