27 Crust. 
CRUSTACEA. 
Telmessus serratus (White). Differences of sex and age; id. 1. c. 
p. 208 B. 
Corystoides abhreviatus^ sp. n., A. Milne-Edwards, 1. c. p. 20, Rio de la 
Plata above Monte Video. 
Trichopeltarion, g. n. Distinct from Peltarion by the very vaulted 
hairy cophalothorax and the unequal hands. T. nobiU^ sp. n., id. 1. c. 
pp. 19 & 20, pi. ii. St. Lucia, 151 fath. 
DoRIPPIDiE. 
Corycodus [-6?es], g. n. Cephalothorax subpentagonal, very thick in 
front, truncate behind,, a large interval between the insertion of the first 
and second pair of legs ; the abdomen of the female covering only the 
last three sternal segments. C. hullatm, sp. n., A. Milne-Edwards, 
Bull. Mus. 0. Z. viii. p. 23, Morro Lighthouse, W. Indies, 175-250 
fath. 
Cyclodorippe, g. n. Cephalothorax narrowed in front and behind, sides 
regularly rounded ; no pterygostomial notch ; abdomen six-articulated in 
. both sexes ; ambulatory legs as in Dorippe. C. nitida, antennaria, and 
agassizi, spp. nn., id. 1. c. pp. 24-26, W. Indies, 88-287 fath. 
CymopoUa obesa, dilatata^ dentata, cristatipes, cursor, gracilipes, sica, 
and acutifrons, spp. nn., id. 1. c. pp. 27-30, W. Indies, 56-298 fath. 
Cymonomus, g. n. No eyes, eye-stalks slender, rostrum pointed; am- 
bulatory legs as in Dorippe, but fourth and fifth pair not subcheliform. 
C. quadratus, sp. n., id. 1. c. p. 27, Havanna, &c., 175-450 fath. 
Cymopolus, g. n. Cephalothorax broader in front than behind, rostrum 
pointed ; eyes normal ; female orifice in the basilar article of the third 
pair of legs. C. asper, sp. n., id. 1. c. p. 27, Montserrat and Sand Key, 
75-148 fath. 
Ethusa americana, sp. n., id. 1. c. p. 30, Western Florida, 13-20 fath. 
ANOMURA. 
F. E. V. Boas discusses the characters and affinities of the Anomura, 
especially of Lithodes and the Paguridce ; he distinguishes among the 
latter three groups: —(1) Paguristes, (2) Eiipagurus-Bernhardus, (3) the 
rest of Paguridce, which he calls “ Pagurus, &c.,” these three are essen- 
tially distinct by the arrangement of the chitinous plates on the back of 
the pleon and the number of gills, also by some differences in the oral 
parts and thoracic feet. Paguristes represents the original form, Eupa- 
gurus and the third group are differentiated from it in different ways, 
and Lithodes, again, agrees in the plates of the pleon and the gills 
essentially with Eupagurus, and is to be regarded as Eupagurus modified 
for existence without a protecting shell. Birgus is a similarly modified 
Ceenobita ; Dan. Selsk. Skr. (6) i. 2, pp. 110-124, pi. i. figs. 9-11, pi. ii. 
figs. 56-60, pi. iii. figs. 89, 90, & 114-118, pi. iv. figs. 141-143, pi. v. figs. 
161 & 178-180, pi. vi. figs. 186-200. Recapitulated, pp. 189-195, and in 
Zool. Anz. iii. pp. 349-352. The development of the Paguridce discussed 
