556 MR. J. CARTER ON THE 



species, Glyphea Couloni, Trib., and G. Meyeri, Trib., figured and 

 described by M. de Tribolet (Bull, de la Soc. Geol. de France, 3^ ser. 

 t. iii. pi. XV. figs. 2, 4) ; but the figures of neither of these species 

 indicate the existence of the crest of crowded tubercles on the border 

 of the hand corresponding to the fixed finger. 



PSEUDASTACUS, Sp. (PI. XYI. fig. 10.) 



Chelae of first pair elongated ; basal portion of propodite (hand) 

 more than twice as long as wide, subcylindrical, surface with minute 

 tubercles, in front of which is a minute depression. Pingers slender, 

 smooth, subterete, probably shorter than the hand (imperfect). 

 Carpopodite short, granulated like the propodite. 



In general character these chelae so closely resemble those of 

 Pseudastacus, as figured by Professor Oppel (Pal. Mitth. tab. x. and 

 xi.), that I provisionally refer them to that genus. 



Length of hand 9 millim. ; width of hand 4 millim. 



Coll. Mr. George,' Northampton. 



Specimens examined 2. 



Pagurtts, sp. (PI. XYI. fig. 11.) 



Chelae of first pair ; basal portion of propodite (hand) approxi- 

 mately quadrate in outline, rather longer than wide, dorsal surface 

 slightly convex, smooth, with a few small scattered punctations ; a 

 slight longitudinal furrow runs from the base of the dactylopodite to 

 the carpal articulation, which is nearly straight transversely. Palmar 

 surface flattened, smooth. Fingers about as long as hand, nearly 

 equal in size, both deeply pitted by large setigerous puncta, which 

 are most numerous at the apex ; dentary borders nearly straight, 

 and bear a series of 6-8 equal-sized tubercles. Carpopodite 

 distinctly tuberculated, and having an oblique longitudinal groove 

 on the proximal moiety. Meropodite smooth laterally, posterior 

 border roughened by tubercles. 



Length of chela 14 millim. ; width of hand 7 millim. 



Coll. Woodwardian Museum. 



Specimen examined 1. 



Pseudastacus ? seeialis, uov. sp. (PL XVI. fig. 12.) 



Propodite elongate, 15 millim. long and 6 millim. wide, subcom- 

 pressed, ovoid in section ; fixed finger about half the length of the 

 hand : dorsal surface of hand with several (5 or 6) longitudinal 

 rows of mamillated tubercles, which are surrounded by tubercles 

 of a much smaller size ; the palmar surface bears numerous irre- 

 gularly disposed tubercles of various sizes, but all smaller than those 

 of the dorsal rows. 



Oxford Clay, Fletton, Hunts. 



Coll. Alfred Js"". Leeds, Esq., and Mr. George. 



I am unable to refer this pretty chela with certainty to any 

 known genus ; but the characters are so well marked as to render 

 specific mention desirable. The name applies to the disposition of 

 the tubercles on the dorsal surface of the hand. 



