428 A. E. Verrill — North American Cephalopods. 



Vov a brief syDopsis of the previously known genera of this fam- 

 ily,* see pp. 250, 251. 



Owen's family, Teuthidm, included nearly all the Decacera having 

 horny internal sludls. As adopted hy D'Orbigny, it included our 

 Omniastrephidm and Teuthidm. 



Enoploteuthis (See pp. 25 1, 404). 



Enoploteuthis Hartingii Vcrriii. (pp. 240, 241, 404). 

 Enoploteuthis Molinae ii'Orb.=E. Cookii Owen. (pp. 241, 404). 



Moroteuthis Verrill. (See p. 393). 

 Moroteuthis robusta (I)all) Verrill. (pp. 246, 393). 



GonatuS Graj'. (See pp. 290, 387, 390). 



Gonatus amcenus Gray. (pp. 291, 388, 390). 



LestoteuthiS Verrill. (See pp. 250, 387, 390). 

 1. LestoteuthiS Fabricii (Licht.) Verrill (pp. 291, 293, 387-390). 



Family OMMASTREPHID^. 



Teuthidce (pars) D'Orbig.. Cephal. Acetab., pp. xxxvii, 328. 

 Onychoteuthidce (pars) Gray, Catal. Brit. Mus., Moll., vol. i. p. 45, 1849. 

 Ommastrephidoe Gill, Classification Mollusca, p. 1, 1871. 

 Tryon, Man. Conch., vol. i, p. 107, 1879. 



Body elongated, often very large (Arehiteuthis), tapeiing to a point 

 posteriorly, shorter and less acute in the female. Sessile and tentacu- 

 lar arms without hooks, but provided with suckers, liaving denticu- 

 lated, horny rings ; tentacular arms witli an expanded club, having 

 four rows of suckers on its middle portion, those in the two central 

 rows larger; proximal portion with or without smooth-rimmed con- 

 nective suckers and tubercles ; tip with a cluster of smooth-rimmed 

 suckers. Siphon in a deep groove, attached by four bridles ; an internal 

 valve. Elye-lids with a distinct anterior sinus. Nuchal and olfactory 

 crests consist of three longitudinal membranes on each side, united 

 by a transverse one in front. Connective cartilages of the mantle 



*The genus Dosidicus Steenst., should not have been there included. It belongs to 

 the Omm.astrej)hidw, and is very closely related to Sthenoteuthis. The tentacular club 

 bears denticulated suckers and the terminal cone of the pen is hollow. 



Ancistroteuthis Krohnii appears to belong to Onychoteuthis. Gonatus and LestoteuthiS 

 have since boon restricted and their characters revised. (See pp. 388-394). 



