OCTOPUS. 125 



lowest, especially of the ventral arms, one-rowed ; web broad, 

 minutely granular above, especially between the upper arms. 

 Described from alcoholic specimens in Brit. Mus. 



Australia. 



Arms 3, 2, 4, 1. 

 O. CEPHEA, Gray. 



Body smooth, oblong, rather elongate ; ocular beard small, 

 surrounded b^y other smaller beards ; arms thick, moderately 

 long ; web broad, broader in front, upper surface quite smooth ; 

 cups very large, the 10th to 20th of lateral arms larger, equal, 

 the four or five lowest of all the arms, one-rowed. Very like 

 0. vulgaris, but differs in the lateral cups. 



Specimens in alcohol, Brit. Mus. 



Habitat unknown. 



4. Doubtful and apocryphal species. 



0. OERULESCENS, Peron. Body short ; arms much longer than 



body ; cups ending in a point, but not clawed. Blue, varied 



with very small close purple dots ; cups whitish. BLAINVILLE. 



The form of the cups, if correct, would indicate a different 



family . GRAY. 



Australia. 



O. LONGIPES. Leach. Body elongated, oval, glabrous, gray spotted 

 with black. Arms very long, slender. Cups large, rather prom- 

 inent. Prob. = 0. Cuvieri or 0. aranea. GRAY. 



Habitat unknown. 



0. BREVITENTACULATUS, Blainv. Body short, globular, smooth; 

 arms thick, cirrous, conical, short ; proportion of length, 2, 3, 

 4, 1 ; the longest only three times as long as the head ; cups large. 

 Probably 0. octopodia (vulgaris) contracted. 



Habitat unknown. 



0. VENUSTUS, Rang. PI. 29, fig. 28 a. 



Body oval, purse-formed, smooth ; aperture large ; head short, 

 rather broad ; eyes prominent ; arms rather short, nearly equal ; 

 cups small. RANG. 



I Indeterminable. A young specimen. 

 Algiers (Aucapitaine) ; Isle of Goree. 



