460 Messrs. T. and A. Scott on some 



slender subequal spines (fig. 15) ; the secondary branch is 

 somewhat subcylindrical, the breadth is about two thirds of 

 the length, ancl it is furnished with two setaj on the inner 

 margin and four on the truncate apex (tig. 15). Spermato- 

 phore large. 



Habitat. Pools above high-w^ater mark near the head of 

 West Loch Tarbert, iVrgyleshire ; not very common. 



Bemarks. There seems to be little doubt that this is a 

 variety of Cantliocam'ptus palustris^ Brady ; it agrees with 

 that species in several of its more important characters, such 

 as the general structure of the antennules and of the first and 

 fifth thoracic feet of the female ; the second, third, and fourth 

 pairs of thoracic feet are also similar to those of that species. 

 The chief differences, on the other hand, are these: — (1) the 

 secondary branches of the antenna of this variety are only 

 one-, instead of two-jointed ; (2) the proportionally shorter 

 second and third joints of the inner branches of the first 

 thoracic feet ; and (o) the structure of the fifth pair in the male. 

 In the male fitth pair the secondary joint is comparatively 

 large, being elongate and subcylindrical. 



Laopho7ite propinqua^ sp. n. (PI. XVII. figs. 1-9.) 



Description of the Species. — Female. Length "72 millim. 

 (about ^of an inch). Body elongate, depressed; rostrum broad 

 and with a minute seta on each side of the bifid apex (fig. 2). 

 Antennules seven-jointed; the second and third joints are 

 considerably longer than the others, and the second joint is 

 also dilated and armed with a strong conical tooth on the 

 external aspect (fig. 3). The proportional lengths of all the 

 joints are nearly as follows : — 



Proportional lengths of the joints. . 17 , 22 . 23 . . 5 , 7 . 11 

 Number of the joints 1 2 3 46 6 7' 



Antennse strong ; both the first and second joints are fringed 

 with small seta on the inner edge ; secondary branch small, 

 one-jointed (fig. 4). The second joint of the posterior foot- 

 jaws is somewhat dilated and bears a powerful terminal claw. 

 The inner branches of the first pair of swimming-feet are 

 very strong ; the first joint is of considerable length, being- 

 five times longer than broad, but the second is very short and 

 is armed with a strong claw; the outer branches are slender, 

 three-jointed, and about half the length of the first joint of 

 the inner branches ; the second basal joint is also densely 

 hirsute, as shown by the drawing (fig. (3). The second pair 



