[223] CEPI1AL0P0DS OF NORTHEASTERN COAST OF AMERICA. 
• Family MASTIGOTEGTHIDdB Yerrill. (See p. [114].) 
Mastigoteuthis Yerrill. (See p. [115].) 
7. Mastigoteuthis Agassizii Verrill. (P. [115].) 
Family OHIROTEUTHIDJE Gray (restricted). (See p. [118].) 
Chirotetjthis D’Orb. (See p. [118].) 
Chiroteuthis is the only genus in this family that has been hitherto 
recognized. 
S. Chiroteuthis lacertosa Yerrill. (Pp. [119], [209].) 
Brachioteuthis Yerrill. (See p. [213].) 
9. Brachioteuthis Beanii Yerrill. (P. [214].) 
Calliteuthis Yerrill. (P. [117].) 
10. Calliteuthis reversa Verrill. (P. [117].) 
Calliteuthis ocellata (Owen) Yerrill. (P. [202].) 
Family HISTIOTEUTHIDaE Yerrill. (See p. [120].) 
Histioteuthis D’Orbigny. (See p. [120].) 
11. Histioteuthis Collinsii Yerrill. (Pp. [121,216].) 
TAOMDEA 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 subterminal 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 DESMOTEUTHIDaE Yerrill. (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 dong ; ink-sac small. 
Desmoteuthis Yerrill. (See p. [125].) 
12. Desmoteuthis hyperborea (Steenst.) Verrill. (F. [126].) 
13. Desmoteuthis tenera Verrill. (P. [216].) 
Taonius Steenstrup (restricted). (See p. [129].) 
14. Taonius pavo (Les.) Steenstrup. (Seep. [130].) 
MYOPSIDJE 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. 2d, m ; and fig. 4a). It seems to me probable that this organ 
is the true homologue of the foot of gastropods. 
