460 Messrs. T. and A. Scott on some 



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

 somewhat subcylindrical, the breadth is about two thirds of 

 the length, and it is furnished with tw^o setje on the inner 

 margin and four on the truncate apex (fig. 15). Sperraato- 

 phore large. 



Habitat. Pools above high-water mark near tiie head of 

 West Loch Tarbert, Argyleshire; not very common. 



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

 variety of Canthocamptus palustriSj 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 antennte 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 (3) the structure of the fifth pair in tiie male. 

 In the male fifth pair the secondary joint is comparatively 

 large, being elongate and subcylindrical. 



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



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

 (about -g^ 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 . 6 . 5 . 7 . 11 

 Number of the joints 1 2 3 4 6 6 7 ' 



Antennse strong; both the first and second joints are fringed 

 with small setge 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 tlian 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. 6). The second pair 



