572 DR THOMAS SCOTT ON THE 
decrease in length, as indicated by the formula, which shows approximately the pro- 
portional lengths of all the joints : 
Proportional lengths of the jomts 11 21 7 15 11 10 9 
Numbers of the joints era Peat Pianeta 7 
The-second joint bears three small teeth on its upper edge, as shown in the drawing 
(fig. 2). 
Antenne moderately stout, and armed with an elongated and slightly curved 
terminal spine and a few moderately long setze. 
Mandibles and maxillee somewhat resembling those of the Lichomolgus mentioned 
above. 
The first maxillipeds are also somewhat similar to those of the same species. 
The second maxillipeds are each composed of two joints of nearly equal length; the 
second joint is narrow at the proximal end, but increases in width towards the distal 
extremity, which is obliquely truncated ; the external part of the truncated end appears 
to be slightly hollow, and armed with four short spines, while the inner angle is 
produced into a stout spiniform tooth (fig. 6). 
The first and second pairs of swimming feet are somewhat similar to those of other 
species of the Lichomolgide. In the third pair, the end joint of the outer ramus 
carries five dagger-shaped spines round the outer margin and apex, and five setze on the 
inner margin. A dagger-shaped spine also springs from the outer distal angles of the 
first and second joints, while the second has also a seta on its inner edge. The inner 
ramus has the end joint furnished with three dagger-shaped spines and two setee, while 
the second joint bears two sete and the first one seta on the inner margin, as shown in 
the drawing (fig. 9). 
In the fourth pair, the inner ramus is uniarticulate, rather longer than the first joint 
of the outer ramus, and carries two sete at the apex; there is alsoa small but distinet 
tooth near the middle of the inner margin (fig. 10). 
The fifth pair consist each of a single, elongated, narrow joint which bears two sete 
at its distal end. 
Abdomen narrow, elongated, the penultimate segment rather shorter than that on 
either side. Caudal rami short, about equal in length to the last abdominal segment 
(fig. 12). 
The male differs from the female in being provided with larger second maxillipeds, 
which are each armed with a moderately long and slender terminal claw ; the-end joint 
is also fringed with minute bristles, as shown in the drawing (fig. 7). The genital 
segment of the abdomen is also considerably enlarged (fig. 13). The length of the 
female is fully one millimetre, but the male is rather smaller. 
Habitat.—Obtained from Gulf-weed collected by the Scotia in June and July 
1904, between Stations 499 and 553, St Helena, 15° 57’ S., 5° 40’ W., to Tuskar Rock, 
FL lB Nor ZO“. 
