CEPHALOPODA. — BERRY. 



Branchioe with eight segments each. 



287 



I crr». 



Fig. 05. — Opisthoteulhi-i pluto 

 [472], camera drawing of man- 

 dibles. 



Mandibles as in Fig. 65. 

 Radula absent. 

 Measurements . — 

 TABLE XXVIl.— MEASUREMENTS OF Opisthosteuthis pluto. 



Author's Register Number. 



Maximum expansion (tip of right dorsal 



arm to tip of left ventral arm) 



Width across fins 



AVidth of fin (right) 



Maximum length of fin 



Width across eyes 



Length of funnel 



Mouth to tip of right dorsal arm 



Mouth to tip of left dorsal arm 



Mouth to tip of right second arm 



Mouth to tip of left second arm 



Mouth to tip of right third arm 



Mouth to tip of left third arm 



Mouth to tip of right ventral arm 



Mouth to tip of left ventral arm 



Diameter of body of 5th sucker from base, 



right dorsal arm 



Mouth to margin of umbrella between 



dorsal arms 



Mouth to margin of umbrella between 



second and third arms 



Mouth to margin of umbrella between 



ventral arms 



[464] 



Type 



540 



210 



60 



30 



100 



260 

 260 

 250 

 250 

 270 

 245 

 245 

 250 



7 



170 



145 



140 



[468] 



350 



115 



30 



15 



70 



28 



160 



160 



155 



155 



170 



145 



160 



160 



4 



105 



95 



100 



[465] 



Paratype 



115 



20 



10 



75 



21 

 145 

 145 

 150 

 140 

 140 

 145 

 115 + 

 130 



3.5 



95 



100 



80 



[466] 



195 



70 



10 



5 



30 



85 

 85 

 85 

 85 

 90 

 90 

 85 

 90 



2 



60 



55 



55 



Note. — Though great care was taken, the very nature of the animals 

 renders most of the above measurements extremely uncertain. They are, 

 in fact, as a rule, little more than estimates, and hence of value only in 

 tfche most general way. 



