CRUSTACEA. 227 
Palcemon — , sp. n. ?, Sars, 1. c. — P. niloticus, Klunzinger, Zeitschrift fiir 
wissenschaftliclie Zoologie, vol. xi. p. 363, Upper Egypt. 
Caradina varians (Leach), Sp! B., Brit. Assoc. Hep. 1866, p. 64, or Ann. 
& Mag. Nat. Hist. vol. xvii. p. 27, pi. ii. fig. 2", Pl3anouth. 
Caradina tenuis, sp. n., Sp. B. 1. c. pi. ii. fig. 1, Plymouth. 
ScYLLARIDiE. 
Scylldrus nodifer, sp. n., Stimpson, Proc. Chicago Acad, of Sciences, vol. i. 
p. 48, found among the Florida Keys, &c. 
Peneidas. 
Pasiphae sivado (Risso), Sars, 1. c. p. 14. 
Ilippolysmata calif ornica, sp. n., Stimpson, 1. c., found at San Biego, Cal. 
Phynchocychis parvtdtts, sp. n., Stimpson, l.c* 
Glypturus, g. n., Stimpson, Proc. Chicago Acad, of Sciences, vol. i. p. 46. 
Flagella of the antennuloe [first pair of antennm] much longer than their 
peduncles. External maxillipeds indurated ; merus and ischium not dilated, 
no broader than the propodiis, and concave on the outer surface ; ischium 
armed along the middle of its inner edge with a sharp, prominent, spinous 
crest; carpus thick, and only half as broad as propodus, which is greatly 
dilated within, and truneated hut not grooved at the broad anterior margin, 
against which the dactylus folds ; dactylus rather stout, compressed, and 
rather longer than the anterior margin of the propodus. Mandibles strong, 
much indurated; corona with its margin unevenly toothed, deeply cleft 
within, and with the basal process as broad and half as high as the corona 
itself, and having also a toothed edge. Appendages to the first two joints of 
the abdomen [pleon] in the male nearly similar to the corresponding parts in 
the female. Caudal lamellm deeply sculptured. Of the appendages to the 
penult, joint of the abdomen [pleon], the outer lamelh'e appear as if composed 
of two pieces soldered together, the outer one of which overlaps the inner ; 
while the inner Inmellse are obliquely triangular. Terminal segment of the 
abdomen [telson] very small. — Glypturus acanthochirus, sp. n., Stimpson, L c., 
Florida, and at the Tortugas. 
Callichirus, g. n., Stimpson, 1. c. p. 47. Flagella of antenuulm [first pair of 
autennse] rather shorter than their peduncles. External maxillipeds soft, 
coriaceous ; merus and ischium compressed and dilated ; merus short ; carpus 
and propodus much dilated at the inner margins ; propodus large and more 
dilated than the carpus, and with a groove in the anterior margin, into which 
the small curved dactylus folds. Inner lobes and lacinim of the second pair 
of maxillae for the most part narroAV. Mandibles very small and weak, not 
indurated; internal basal projection only slightly developed. Carpus and 
hand [propodus] of the greater cheliped A^ery long. ^The appendages of the 
first and second joints of the abdomen [pleon] in the male are small, those of 
the first pair having but one branch, while those of the second pair have tAvo 
branches, the outer branch being minute. Caudal lamellae much thickened. 
Inner lamellae of the appendages to the penult, joint of the abdomen very 
narrow, almost styliform. Terminal joint of the abdomen [telson] short 
and broad, contracted at the base, and emarginated at the extremity. 
* The only number of the ^ Proceedings ’ that has yet reached us termi- 
nates abruptly in the middle of the description of this species. 
Q 2 
