134 
M. SASAICI. 
mi 
each scries on this part being very thin. But from the 
middle of the arms to their tips the two scries are close 
to each otlicr, the cHstribution becoming very thick. The 
suckers of tlic right ventral arm are a little smaller than 
those of the three dorsal pairs antl they are arranged from 
the extreme l)asc of the arm, in a somewhat thicker series 
than those of the other arms. The left ventral arm shows 
many different features from all the others, this being 
probably due to deformity. 
The tentacles are slender, being much longer than 
twice the mantle-length. The stalks show nearly the same 
character as in Jll. hoylci, being provided with a flat inner 
surface, but the lateral boundary edges of this surface are 
not so distinct as to make"/v2'(r/t7/' of Pfeffer's (19 12, p. 
292) marked by grooves. The clubs at the distal end 
occupy about one-tenth the length of the tentacle, and are 
expanded into a spindle-shape. The fact that the two 
clubs show somewhat different features is probably due to 
the shrinkage of one of them (text-fig. 2). 
The tentacular suckers show the principal characteris- 
tics of the present species, distinguishing it from M. Iioylei. 
They are clearly divisible into three kinds by their situa- 
tion : (i) Connective suckers, comprising from nine to ten 
suckers and from eight to ten fixing tubercles arranged in 
a sin<jle series, which begins on the ventral inner surface at 
a point about two-thirds from the base of the tentacle, and 
running diagonally into the donsal side of the carpal por- 
tion, then going farther up to the middle part of the club 
along its dorsal margin. (2) Suckers of the hand portion, 
^^^separauf^^^viov"^^'^^^ unequal in size, arranged in four longitudinal series ; the 
distal half of left ten- ^^.i- •• -iti „f 
tacle X 7 most ventral series, comprising seven or eight suckers 01 
