20 ME. E. S. GOODEICH ON A COLLECTION OP 



Octopus macropus, Risso. 



With considerable doubt eight specimens have been referred to this species. Seven 

 come from the Andaman Islands (three from Port Blair) and one from the Malacca Straits. 



Octopus aculeatus, d'Orb. 



Ten specimens from the Andaman Islands (six from Port Blair), one from Colombo, 

 and one from Little Cocos Island. It is with some doubt that these have been placed in 

 this species, wliich is not very thoroughly defined. 



Octopus levis, Hoyle ? 



One female specimen from Gopalpur, at a depth of 7 fathoms, has been provisionally 

 placed in this species. It agrees closely, although not perfectly, with Hoyle's description. 



Octopus microphthalmus, n. sp. (PI. 5. figs. 83, 84.) 



One female specimen from Port Blair, Andaman Islands (fig. 83). 



This species is remarkable from the smooth cylindrical shape of the head and mantle, 

 the eyes forming no prominence wliatever on the surface of the head. Tlie mantle ends 

 obtiisely, and fits closely on to tlie head ; the mantle-opening, which is very narrow, 

 reaches rather more than halfway from the siphon to the eye. The aperture of the 

 eyelid is small. The funnel reaches to within 4 mm. of the edge of the web between the 

 ventral arms ; it is attached to the lower su.rface of the head along almost its entire 

 length. Tlie arms are rounded, and l)ear small somewhat conical suckers, which are 

 arranged some distance apart. Although they are placed in two rows, the suckers are 

 situated in zigzag fashion so as to approximate to the condition found in Eledone, for 

 instance, where they are in one row. The mandibles are dark and strong (fig. 84, a Scb). 



The following are the princij)al measurements : — 



Length of mantle and head to lower edge of web between ventral arms . . 4'5 centim. 



,, „ to mantle-edge 2"7 



Breadth of mantle 2 



„ head across eyes 1*5 



Length of dorsal arm 8'6 



, dorso-lateral arm 8'1 



„ ventro-lateral ,, 6'9 



„ ventral „ G'9 



There is a small web at the base of the arms, reaching 1-6 cm. from the mouth between 

 the dorsal arms, where it is longest (the inner surface of this web is the same between 

 the bases of all the arms). 



The colour is yellowish -brown, inclining to dark brown on the upper surface of the 

 mantle, head, and outer surface of the arms. 



