ONYCHOTEUTHID.5; : ONYCHIA, OMMASTREPHES. 57 



* 



Loligo Cardioptera Peron, Voy. Atlas, t. 60. f. 5. 1804 ; Blainv. 



Journ. de Phys. 123., Diet, des Sc. Nat. xxvii. 135. 

 Sepiola Cardioptera LeSueur, Journ. Acad. Nat. Sc. Philad. ii. 



100. 1821. 

 Cranchia Cardioptera Feruss. Diet. Class. Atlas, t. 5. 1823; D'Orb. 



Tab. Meth. Ceph. 58.; Feruss. et D'Orb. Ceph. Acet. Cranchie, 



t. 1. f. 2, 3. cop. Peron ; D'Orb. Voy. Am. Merid. Moll. 34. 

 Sepia Cardioptera Oke?i, Lehrb. des Zool. 343. n. 5. 

 Onychoteuthis Cardioptera D'Orb. Moll, des Antilles, i. 53. n. 13. 



1838, Moll. Viv. et Fos. i. 389. 

 Onykia Caribasa Le&ueur, Journ. Acad. Nat. Sc. Philad. ii. 98. t. 9. 



f. 1, 2. 1821. 

 Loligo Cariba?a Blainv. Diet. Sc. Nat. xxvii. 139. 1823, Journ. de 



Phys. Ixxxvi. 127. ; Feruss. Diet. Class, iii. 67. Atlas, f. 4. 

 Onychoteuthis Caribasa Feruss. Ceph. Acet. Onyth. t. 5. f. 4. 7. 



from LeSueur; D'Orb. Tab. des Ceph. 60., Moll, des Antilles, 



i. 57. n. 14. 

 Onychoteuthis Leachii Feruss. Ceph. Acet. Onych. t. 10. f. 1.4., 



shell represented as expanded at each end. 



Hab. Atlantic Ocean. 



** Fins dorsal. Cups of lateral Arms unequal. 

 2. Onychia platyptera. 



Body cylindrical, smooth ; fins elongate, triangular, _ together 

 narrow lozenge-shaped. Sessile arms long, unecaial ; in length, 

 3, 4, 2, 1 ; cups very unequal, especially of the lateral arms. 

 Tentacular arms short, not enlarged at the end ; basal group of 

 twenty-two cups half open, rest closed ; hooks twelve. Shell 

 broad, lanceolate ; apex with a conical, horny, compressed appen- 

 dix at the tip. 



Onych. platyptera D'Orb. Voy. Am.. Merid. Moll. 41. t. 3. f. 8. 11. 

 1835; D'Orb. et Feruss. Ceph. Acet. Onych. t. 10. f. 8-10. t. 14. 

 f. 16-22. details; D'Orb. Moll. Viv. et Fos. i. 393. t. 26. f. 13. 



Onych. peratiptera D'Orb. Voy. Am. Mer. 39. t. 3. f. 5-7. cop. 

 1835 ; Feruss. et D'Orb. Ceph. Acet. Onythoteuthis, t. 10. f. 5. 7. 



Hab. Coast of Chili. Indian Ocean. 



C. Cups of tentacular and sessile Arms ivith horny Rings. 

 9. OMMASTREPHES. 



Head short, cylindrical, rather depressed, rather narrowed behind 

 the eyes, and there very prominent longitudinal ridges on the 

 nape. Eyes very lar-je, lateral, naked, with an oval external open- 

 ing and a large lacrymal sinus. Buccal membrane very extensi- 



D 5 



