30 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
attachment to the body and with rounded lateral boundaries. The mantle- 
margin has a blunt nuchal prominence and is slightly excavated ventrally. 
The Head presents no character calling for a special remark. 
The Arms are unequal, the order of length being 4, 3, 2, 1 ; the first are 
slender and have a very distinet 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 horny 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-circumference (Plate 6, 
Fig. 5). The Gladius has not been extracted, 
Dimensions. 
mm 
Length, total. . . no 1. 105 
End of body to fan tle. PIANO o ur ri v BO 
Bern Vody e a a a a a 00, 0... 18 
DAA. 05.0070 532 5. 5. . 15 
Eye to edge of umbrela €... 7. 1. 7 
Dengin orna (o. 5 9 97. 9 Sla. Y 
Breadth Of D , . , 4-3. a o 
Diameter of largest indios on allá ans... 8 1 
Diameter of largest sucker on tentacle, . , . . 1.7 
Right, Loft, 
Length of first arm al) 14 
Lengih of second armo x v. s a 20 1B 19 
Length of third atmi 222.0... 98 22 
Length of fount atm) 4) ne 41:25 24 
bengin of totale v P. ey NUT 47 
This species differs from L. japonica (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 particulars, but the teeth of the large tentacular suckers are blunt 
and square instead of with sharp angles of about 60°. 
