xciv NATURAL HISTORY. 



Inches. Lines. 

 Length from the end of the visceral sac to the interspace of the 



fir.'^t or middle pair of dorsal brachia . . ..32 



Ditto of the tentacle . . . . . .42 



Breadth of the body (exclusive of the fins) . . ..18 



Ditto of the head, across the eyes . . . .13 



The specimen presented a dull dusky brown colour, over the whole of the dorsal and 

 lateral aspects, and over the exterior of the arms. The pigment producing this hue 

 was disposed in minute close-set points. Captain Ross's drawing of the recent animal 

 exhibits a greenish metallic lustre, reflected from these surfaces, slight remains of 

 which are still perceptible in the specimen. The ventral surface is of a hght ash colour. 



The form of the abdomen or visceral segment of the body is more ventricose than in 

 Sepiola. The anterior margin of the mantle projects slightly forwards at the middle 

 of its dorsal aspect, as in Sepioteuthis, and is reflected downwards for about half an 

 inch before being continued upon the back part of the head. There is a transverse 

 groove on either side of the mantle, about a line behind its anterior margin: this part is 

 colourless anterior to the grooves, as in Sepiola. 



The fins are short, semicircular, dorsal in their position, but nearer the sides of the 

 body, and placed more forwards than in Sepiola vulgaris; the interspace between their 

 origins is to the breadth of the body as 3 to 4, while in Sepiola vulgaris it is as 3 to 5. 

 They project laterally from the body, with a slight inclination forwards. They measure 

 in length one inch, in breadth ten lines. 



The brachia are proportionately shorter and thicker than in Sepiola, more resembling 

 those of Sepia, but not having the same relative dimensions as in that genus, e. g. the 

 third, and not the fourth pair, is the longest (counting from the dorsal aspect), but the 

 fourth pair is proportionately longer than in Sepiola. They measure. 



The first pair, one inch. 

 The second pair, one inch three lines. 

 The third pair, one inch nine lines. 

 The fourth pair, one inch five lines. 



They present the usual three-sided pyramidal form, with the internal facet beset witli 

 tlie suckers or acetabula. These are of a globular figure, supported by very short sub- 

 lateral peduncles. Commencing from the base of the arms, the suckers are arranged in 

 a double alternate series; this disposition prevails along the whole of the first pair, along 



