464 Rev. Canon Norman's Revision 



Fam. Cranchiidse. 



Fam. Chiroteuthidae. 



Fam. Ommastrephidse. 



Tribe 2. Myopsida (restricted). 



Eyes with a fibrose capsule attached to and continuous 

 with the orbital cartilage, and transparent over the crystalline 

 lens, which it covers. Spermatophores deposited under the 

 buccal membrane of the female, which is especially modified 

 for the purpose. Eggs in very numerous mucilaginous 

 elongated masses, each containing very numerous eggs, and 

 the whole attached together at one extremity. Formula of 

 the radula and character of teeth exactly as in the Oigopsida 

 of the genus Ommatostrephes. 



Fam. Loliginidse. 



B. Sepiophora. 

 Section 2. KATOPROSTHARSENIA * 



Hectocotylization on the basal portion of the fourth or ven- 

 tral arm of the male f. 



Body wide, depressed ; fins extending like a frill nearly the 

 whole length of the body ; shell calcareous, laminated, spongy, 

 a cuttle-bone. Spermatophores attached under the buccal 

 membrane of the female. Eggs ovoid, mamillated distally, 

 and produced at the base into a stalk, by which they are 

 attached to weeds. Formula of the radula 1 — 2 . 1 . 2 — 1, the 

 central and two inner laterals are alike, triangular and simple, 

 the outermost laterals are falciform. 



Fam. SepiidsB. 



Mantle supported by a cartilaginous, semilunar or conical 

 button, and a corresponding pit. 



C. Pheagmophora. 



Shell (in Spirula) in the form of a number of air-chambers 

 connected with each other by means of a siphon. Hectocoty- 

 lization in both of the fourth or ventral arms. 



* /carco, below, having the basal portion of the front arm hectocotylized. 

 + Sejria andreanoides, Hoyle (' Challenger ' Report), is exceptional in 

 having the arm sexually affected to its extremity. 



