394 EXPLANATION OF PLATES. 



FIGURE. PAGB. 



Plate 25. 



20, 21, 22. Loligo Pealii, Lesueur, with pen, and horny ring 



of a sucker. United States, 24 



23. Loligo (Loliguncula) brevis, Blainv. United States, . 25 



24. Sepioteuthis stenodactyla. Grant, Mauritius, . . 26 



25. Sepioteuthis lunulata, Fer. et d'Orb. New Guinea, . 26 



26. Idiosepius pygmseus, Steenst. Zamboango, . . .29 



21. Rossia Owenii, Ball. Great Britain, . . . .28 



28. Cranchia seabra, Leach. W. Africa, . . . .29 



29. Sepiadarium Kochii, Steenst. Hong Kong, . . .28 



30. Loliolus affinis, Steenst. Indian Ocean, . . .26 



Plate 26. 



31. 32. Chiroteuthis Yeranyi, Per. Mediterranean Sea, . 30 

 33, 34. Histioteuthis Bonelliana, Fer. Mediterranean Sea, 31 



35. Loligopsis guttata. Grant. Indian Ocean, . . .30 



36, 37. Thysanoteuthis rhombus, Troschel. Mediterranean, 31 



38. Gonatus amoena, Moller. Greenland, . . . .31 



39, 40. Onychoteuthis Krohni, Yerany. Mediterranean, . 31 



41. Onychia Caribaea, Les. West Indies, . . . . 32 



42. Verania Sicula, Riippell and Krohn. Medit., . . 32 



Plate 27. 



43. Enoploteuthis Smithsii, Leach. W. Africa, . . .32 



44. 45. Ommatostrephes sagittatus,Lain. Europe, New En- 



gland, .......... 34 



46, 47. Hemisepius typicus, Steenstr. Cape of Good Hope, 44 

 48, 49. Sepia officinalis, Linn. Europe, . . . .40 



50. Sepia elongata, d'Orb. ; pen. Red Sea, . . . .40 



51, 52. Spirula Peronii, Lam. Warm Seas, . . .48 



53. Spirula Peronii ; part of the whorl broken away, showing 



the septa and siphuncle, . . ■ . . . .48 



54. Nautilus Pompilius, Linn. Amboina, . . . .57 



Plate 28. 



55. 56. Teuthopsis Bunellii, Desl. Lias, France, . . 26 



57. Leptoteuthis gigas, Meyer. Oxford Clay, Solenhofen, 26 



58. Beloteuthis subcostata, Miiust. U. Lias, Wurtemburg, 27 



59. Phylloteuthis subovata. Meek and Hayden. U. Cret., 



Dakotah, 27 



60. Ptiloteuthis foliatus, Gabb. Cret., California, . . 27 



61. 62. Celeeno conica, Wagner. Lias, Solenhofen, . . 33 



63. Belemnosepia lata, Miinst. Lias, Europe, . . .26 



64, 65. Belosepia sepioidea, Blainv, Eocene, Europe, . 44 



66. Plesioteuthis prisca, Wagner. Lias, Solenhofen, . . 33 



67. Orthoceras planicanaliculatum, Sandb. DeA^onian, 



Nassau, . , . . . . . . .51 



