410 CRUSTACEA. 



by Mr. West wood, with much probability, to be the represen- 

 tatives of the scales of the antennae. 2 d, two lower antennae, 

 with the second antennal segment. 2 e, mandibles. 2/, upper 

 maxilla. 2 g, lower maxilla. 2 h, labium. 2 i, inner foot- 

 jaw. 2 /, one of the first pair of compound feet. 2 m, one of 

 the last pair of compound feet. 2 n, one of the middle pair 

 of compound feet. 2 o, one of the first pair of simple feet. 

 2 p, front of the body seen from above. 2 q, under side of 

 the middle portion of the foot-bearing segments ; those bear- 

 ing the compound feet furnished with a pair of flattened com- 

 pressed leathery plates, the faces of which are opposed to each 

 other. 



Fig. 3. The carapace, pedigerous segments, and basal seg- 

 ment of the abdominal portion of the smaller individuals 

 found, of which there were no fewer than twenty-seven. The 

 carapace is less convex, more transversal, rugose at the an- 

 terior part; the last leg-bearing segment produced into an 

 acute point on each side. 



Fig. 4. Gammarus Krorjeri. 4 , natural size. 4 b, the 

 two central divisions of the terminal segment. 



PLATE XXXV. 



Fig. 1. Stegocephalus Ampulla. 1 a, front of head; both 

 antennae on one side removed. 1 b, labium of two mandibles. 

 1 c, under side of left mandible, showing the articulation of 

 the flattened articulated appendage. 1 d, first maxilla. 1 e, 

 second maxilla. 1 /, half of the labrum. 1 g, a minute cili- 

 ated membranous appendage, which may possibly be a portion 

 of a maxilla. 1 h, footjaws. 1 i, one of the first pair of feet. 

 1 k, tail-pieces. 1 I, one of about fifty young taken from the 

 ovigerous pouch. 



Fig. 2. Caprclla spinifera. 2 a, natural size. 2 b, upper 

 lip. 2 c, "palpigerous mandibles?" 2 d, first maxilla. 2 e, 

 second maxilla. 2 /, labium. 2 g, footjaws. 2 h, terminal 

 segments of the body seen from above. 2 i, the same seen 

 sideways, showing a pair of short exarticulate filaments at- 

 tached to the last leg-bearing segment, and a pair of similar 



