22 PHILONEXID^. 



In this family the cups are fleshy and pedunculated, 

 very extensible, and arranged in two rows ; the eyes are 

 large and prominent. There is no shell either external 

 or internal ; the animals are pelagian, living on the high 

 seas, and are crepuscular or nocturnal, eating floating 

 raollusca. They are gregarious, and are found in the 

 Atlantic and Mediterranean ; two genera are at present 

 known. 



Genus PHILONEXTS, D'Orhigny. 



Arms free, tapering, unequal. Nocturnal. 



Ex. P. Eglais, D''Orbigny^ pi. 1. fig. 6. 



The Philonexes during the night, cover the surface of 

 the water in innumerable phalanxes ; they inhabit the 

 high seas, and are sociable and gregarious ; like the 

 Ommastrephes and Loligines, they are true voyagers, 

 instead of being sedentary like the Octopi properly so 

 called. They avoid the light, change colour, and are very 

 voracious, preying on Glauci, lanthintE^ and Pliysaliee. ; 

 there are six species known. 



Species of Philonexis. 



Alcaeus, Gray. hyalynus, Rang. 



Atlanticus, UOrh. microstomus, Regnaud. 



Eglais, nOrh. tuberculatus, Risso. 



Genus TREMOCTOPUS, Delle Ohiaje. 



Arms moderate ; the two upper pair longest, and 

 webbed nearly to the tip. 



Ex.. T. Quoyanus, WOrhigny., pi. 1. fig. 7. 



