30 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



attachment to the body and with rounded lateral boundaries. The mantle- 

 marrjin has a blunt nuchal prominence and is slightly excavated ventrally. 



The Head, presents no character calling for a special remark. 



Tlie Arms are unequal, the order of length being 4, 3, 2. 1 ; the first are 

 slender and have a very distinct dorsal keel ; the second have a well-marked 

 ventro-lateral angle ; the third are broad and flattened and with a distinct web 

 externally; the fourth are nearly as stout as the second, and have the sides, 

 especially that turned towards the tentacle, excavated into a groove. The 

 suckers (Plate 6, Figs. 1, 2) are of the usual form and arrangement ; the horny 

 ring has about 20 blunt teeth, of which about 12 are in the proximal and 8 

 in the distal moiety. The buccal membrane has seven points, which bear one 

 or two very minute suckers (Plate 6, Fig. 7) ; between the ventral points is a 

 papilla for the reception of spermatophores. 



The Tentacle is small and slender ; the club is of the usual type and about 

 one-third the length of the tentacle ; in the centre are eight or ten large 

 suckers (Plate 6, Fig. 3), about double the lateral ones in diameter; there 

 are about half-a-dozen proximal suckers and a larger number in four rows dis- 

 tally gradually diminishing in size towards the tip. The homy ring in the six 

 or eight largest suckers has five blunt square-cut teeth on its distal margin, 

 and in the lateral and terminal suckers about eight acute teeth separated by 

 intervals broader than themselves on the distal semi-circuiuference (Plate 6, 

 Fig. 5). The Gladius has not been extracted. 



Dimensions. 



mm. 



Length, total 135 



End of body to mantle-margin 85 



Breadtli of body 18 



Breadth of lieail 15 



Eye to edge of umbrella 7 



Length of fin 27 



Breadth of fin 35 



Diameter of largest sucker on sessile arm .... 1 



Diameter of largest sucker on tentacle 1.7 



Right. Left. 



Length of first arm 15 14 



Length of second arm 18 19 



Lengtli of third arm 25 22 



Length of fourth nrm 25 24 



Length of tentacle 47 47 



This species differs from L. jnpnnica (Hoyle, '86, p. 157) in the compara- 

 tively small length of the fin and in the fact that the teeth in the large tentac- 

 ular .suckers have rather more space between them. It also resembles L. gahi 

 in many ])articulars, hut the teeth of the large tentacular suckers are blunt 

 and square instead of with sharp angles of about 60°. 



