[223] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 433 



Family MASTIGOTE1JTH1TLE Verrill. (See p. [114].) 

 Mastigoteuthis Verrill. (See p. [115].) 



7. Mastigoteuthis Agassizii Verrill. (P. [115].) 



Family CHIEOTEUTHID^ Gray (restricted). (See p. [118].) 



Chiroteuthis D'Orb. (See p. [118].) 

 Chiroteuthis is the only genus in this family that has been hitherto 

 recognized. 



8. Chiroteuthis lacertosa Verrill. (Pp. [119], [£09].) 



Brachioteuthis Verrill. (See p. [213].) 



9. Brachioteuthis Beanii Verrill. (P. [214].) 



Calliteuthis Verrill. (P. [117].) 



10. Calliteuthis reversa Verrill. (P. [117].) 

 CalMteuthis ocellata (Owen) Verrill. (P. [202].) 



Family HISTIOTEUTHIDJE Verrill. (See p. [120].) 



Histioteuthis D'Orbigny. (See p. [120].) 



11. Histioteuthis Collinsii Verrill. (Pp. [121,216].) 



TAONIDEA Verrill. 

 Eyes large, stalked or prominent, having free lids, but no -sinus. 

 Mantle united to base of siphon and back of neck by three muscular 

 commissures. Siphon large, without a true subtermiual valve, but 

 usually with special elevated processes, or flaps, in the basal portion. 

 Stomach small, far back ; intestine very long, covered with lateral fol- 

 licular glands ; liver small, far forward; ink-sac small. Pen slender an- 

 teriorly, as long as the mantle. Hectocotylized arm not observed. All 

 the arms bear suckers. 



Family DESMOTEUTHID^E Verrill. (See p. [124].) 



Body much elongated, mantle united to the neck by three muscular 

 commissures. Siphon without a true valve, but with three peculiar, 

 special thickenings, or raised processes,* in its basal portion. Eyes 

 prominent. Intestine very long ; ink-sac small. 



Desmoteuthis Verrill. (See p. [125].) 



12. Desmoteuthis hyperborea (Steenst.) Verrill. (P. [126].) 



13. Desmoteuthis tenera Verrill. (P. [216].) 



Taonius Steenstrup (restricted). (See p. [129].) 



14. Taonius pavo (Les.) Steenstrup. (Seep. [130].) 



MYOPSID^E D'Orbigny. (See p. [131].) 

 This artificial division includes two very diverse groups, which not 



* Of these organs the median dorsal one is larger and more complicated than the 

 others (see PI. LV, fig. 2<7, m ; and fig. 4a). It seems to me probable that this organ 

 is the true homologue of the foot of-gastropods. 

 S. Miss. 59 28 



