40 Moll 
MOLLUSCA. 
StauroteutJiis syrtensis (Verrill), Verrill, Am. J. Sci. (3) xix. p. 294, 
pi. xvi. figs. 1-5, Sable Island, Nova Scotia ; one specimen only known. 
See also Ann. N. H. (5) v. p. 191. 
GEqopsidj]. 
Histioteuthis collinsi (Verrill), Verrill, Tr. Conn. Ac. v. p. 234, 
pis. xxii. & xxvi. Am. J. Sci. (3) xix. p. 290, pi. xiv.. Deep water off 
Nova Scotia. 
Ommastrephes. J. Steenstrup (Overs. Dan. Selsk. 1880, pp. 73-79, pi.) 
proposes a distinct subfamily Ommastrephini^ with the following cha- 
racters internal shell stiletto- or arrow-shaped, with a small hollow cup 
at its end ; siphon placed in a more or less deep pit, with four muscular 
bridles; supporting apparel of the mantle T-shaped; four- waterbags 
round the eyes, but none at the root of the lateral arms ; horny rings 
of the suckers regular. He distinguishes among them the following 
genera : — 
1. Ommastrephes (Orb., 1835). Pit of the siphon deep, plaited in front ; 
tentacular arms with a row of alternating suckers and corresponding 
convex cushions, forming an adhesive apparel, at their extremity ; lateral 
arms, chiefly those of the third pair, with broad membranaceous wing- 
like appendages ; horny rings provided with four larger teeth. 0. gigas 
(Orb.), pteropus (Steenstrup) bartrami (Lesueur), oualaniensis (Lesson), 
mid. pelagicus (Bose.) 
2. Dosidicus (Steenstrup, 1857). Differs from the preceding by the 
arms being attenuated in their outer half, and provided with very crowded 
long-stalked suckers. D. eschrlchti (Steenstrup), South Sea. 
3. Todarodes^ g. n. Pit of the siphon moderately deep, plaited in 
front ; tentacular arms without the adhesive apparel, lateral arms not 
winged ; horny rings with alternating larger and smaller teeth through- 
out. T. sagittatus (Lam.) = todarus (Delle Chiaje, Verany), European 
Seas, and pacijicus (Steenstrup), Japan. 
4. Illex, g. n. Pit of the siphon not plaited, tentacular arms without 
adhesive apparel, lateral arms not winged ; horny rings of the larger 
suckers with blunt toothlets ; small suckers near the tip of the arms in 
eight rows. I. illecebrosus (Lesueur) = piscatorum (Lapylaie) = sagit- 
tatus (Orb., nec Lam.), Newfoundland, and coindeti (Verany), Mediter- 
ranean. 
Ommastrephes pillce (Verany) is a young Illex coindeti^ 0. cequipodus 
(Verany) a young TodurodeSj 0/vim. meneghinii and hianconii (Verany) 
are probably young Onychoteuihis. 
In all these Ommastrephini the fourth or ventral arm is hectocotylised 
in the male, and the spermatophores are attached within the mantle- 
cavity near the root of the gills.. The male of Ilex coindeti has a shorter 
and thicker body than the female, and its suckers are of larger size 
(p. 93). The pit of the siphon in the above genera is figured on woodcut, 
p. 79, the adhesive apparel of the tentacular arms on woodcut, p. 11. 
Ommastrephes illecehrosa (Lesueur, Verrill), N.E. Coast of America, 
