TULLBERGELLA CUSPIDATA. 71 



The perceonal segments are somewhat convex transversely; the 

 surface is slightly rugose, being thickly set with small nobs or tubercles 

 (p. 26, fig. 27). ' 



The first pair of perceopoda (p. 32, fig. 5l) are a little shorter 

 than the second; the femur is linear, and narrow; the carpus is nearly 

 square, somewhat narrowed at the base, and not produced; the under 

 free margin is finely serrated, bordered with short bristles, and is a 

 little longer than the hind margin of the metacarpus, which forms a 

 thin serrated edge, with simple teeth; the dactylus is smooth, and not 

 fully half as long as the metacarpus. The second pair (PL II, fig. 13) 

 are similar to the first in shape, but the serration on the hind margin 

 of the metacarpus consists of larger, finely denticulated teeth. The 

 third and fourth pairs are comparatively slender, and much shorter 

 than the fifth pair; the femur is narrow, linear, and not broader than the 

 following joints The fifth pair have the femur fully as broad as that 

 of the sixth, almost ovate, with the lower front corner a little produced; 

 it is consideraby shorter than the three following joints together. The 

 sixth pair (p. 35, fig. 61) are much shorter than the fifth; the lower 

 hind corner of the femur is produced into a broad, triangular, sharp- 

 pointed process, which is a little more than half as long as the breadth 

 of the femur; the femur is about as long as the three following joints 

 together. The seventh pair are incomplete, consisting of only the femur, 

 genu, tibia, and carpus; all the joints are provided with glands; the 

 femur is fully as broad as, and about a third part shorter than, that of 

 the sixth pair; it is more* than twice as long as all the following joints 

 together. 



The pleon is about as long as the last six perseonal segments 

 together. The lateral, sharp-pointed process of the last pleonal segment 

 (p. 38, fig. 74) does not reach fully to the middle of the last coalesced 

 ural segment. 



The first ural segment is more than half as long as the last 

 coalesced, which is about a fourth part broader than long, and a little 

 longer than the telson. 



The first pair of uropoda (p. 38, fig. 74) reach fully to the 

 apex of the last pair, and a little beyond the apex of the telson; 

 the peduncle is shorter than the inner ramus, which is a trifle 

 shorter than the outer, both being elongate-lanceolate, sharp-pointed, 

 and serrated. The second pair do not fully reach to the apex of the 

 last pair; the peduncle is shorter than the rami, which are equal in 



