282 
BULLETIN OF THE BUREAU OF FISHERIES 
the shortest, usually a very little longer than the mantle in adult specimens and about a third as long a, 
the dorsal pair; all the arms smooth externally, without keels or carinations. Umbrella thin, delicates 
hyaline; but little developed between the ventral arms, between these and the third pair, and between 
the latter and the second pair; very extensive between the four dorsal arms, where it attains its maxi- 
mum, connecting the first and second arm on each side for nearly half their length, but somewhat more 
deeply cleft between the dorsal arms; continuous along the dorsal margin of the second pair as a delicate 
web constantly narrowing distad, but along both borders of the dorsal arms it maintains itself as a promi- 
Fig. 8. — Tremodopu^violaceus , ventral view of large 
female [221], from station 3930, X 2. Drawn by 
R. L. Hudson. 
Fig. 9. — Trenwclopus violaceus, dorsal view of speci- 
men [221], shown in figures, X 2. Drawn by R. L. 
Hudson. 
nent veliform web, ofttimes even broader than the arms themselves, only the filiform extremities of the 
arms remaining free. In most adult specimens these tips and even the more distal portions of the 
webbed regions are abruptly decollated. 
Suckers small, regularly alternating in two very widely spaced rows, save the basal three which are 
in a single row and notably larger than any of the remainder except those on the ventral arms which are 
greatly elevated, cylindrical in shape, much fewer in number, and the rows less widely interspaced. 
Except at the base the suckers of the four dorsal arms are numerous, much reduced in size, little elevated, 
and with very small openings; thej'^ soon become entirely rudimentaiy' and suddenly crowded laterally 
