S4 JOURNAL OF THE NE^V JEESEY 



KEY TO THE OEPHALOPODa 



* Body short, rounded behind, with minute terminal fins ; having Avithin a 

 white, pearly, spiral, many-chambered shell. Pelagic 71. SpirulidcB: 



* Body elongated ; eyes covered by the skin of the body ; an internal homy 



part in the back, shaped like a feather ; frequently found near shores 



76. Loliginidce. 



* Body elongated ; eyes naked ; the internal horny part in the back never 

 feather-shaped, usually small, lance-form. (A.) 



A. Fins on the back, not extending to the tail, rounded, narrow at base... 



75. SepiolidcB. 



A. Fins extending to the extremity of the body. (B.) 



B. Body attenuated behind i fins rounded; tentacular arms long 



.74. Cranehiidce. 



B. Body not especially slender behind ; fins usually triangular. (O.) 



O. Tentacular arms short and furnished with suckers only 



72. Ommatostrephidce. 



C, Tentacular arms with thick clubs furnished with hooks as well 

 as suckers 73, Onyehoteuthidce. 



