Zoology. 123 
Gen. 7. CrrBaNanIUS, D.—Manus anticz plus minusve depressze, 
subzequee, digitis apice corneis, in plano horizontali claudentibus. 
Frons medio breviter rostratus. 
Il. CANCELLINZE.—Abdomen symmetricum. 
Gen. CaucErLLus, Edwards. 
Fax. II. CENOBITIDZE. 
Anteunz internz multo elongata, articulo 1mo oculis sepius longiore, 
valde deflexo.  Maxillipedis externi palpus flagello non instructus.— 
Species subterrestriales. 
Gen. 1. CENOBITA, Edw. — Corpus angustum, carapace elongato, 
fronte non rostrato. Abdomen in cochleam retortum, superficie 
plerumque carnosum. 
Gen. 2. Bincus, Leach.—Corpus latum, carapace parce oblongo 
postice latissimo, fronte triangulato. Abdomen directum, lami- 
nis crustaceis dorso plerumque tectum. 
The following are the names of the species described in this paper: 
Bernhardus Novi-Zealandize, B. armatus, B. hirsutiusculus, B. pubes- 
cens, B. tenuimanus ; Paguristes longirostris, P. hirtus; Pagurus fabima- 
nus, P. scabrimanus ; together with the following referred to Pagurus, 
but which pertain to the new division Clibanarius, C. :equabilis, C. ze- 
bra, C. humilis, C. globoso-manus. The last may be the P. corallinus 
of Edwards. Also Cenobita carnescens and C. brunnea. D. 
3. On the Genus Orthostoma ; by Jauzs D. Dawa.—The genus Or- 
thostoma was referred by its describer, Dr. Randall, (J. Acad. Nat. Sci., 
Philad., viii, 121, pl. 5, 1840,) to the family Gecarcinidz. In its con- 
vex or obese form, it approaches that group. Yet the dentate antero- 
lateral margin, and thin dentate front led to his remarking that ** the 
species has at first sight much resemblance to the Cancers." — Upon 
examining the specimens, recently, in the collections of the Academy 
at Philadelphia, I find that in their essential characters as well as the 
texture of the carapax, the species is related to the T'elphusidae. "The 
male verges are situated as in Telphusa, and not as in the Grapsoidea ; 
and in general habit, the described species is near Potamia and Tricho- 
dactylus. lt has the 2d joint of the outer maxillipeds oblong (but little 
shorter than the second), with the summit oblique, and the 4th joint 
articulated with it near the outer apex. "The male abdomen is very 
broad triangular, and 5-jointed. 
The known genera of TelIphusidz, are, then, as follows :— 
G. 1. TEr»nusa, Latr.—Articulus maxillipedis externi 3tius sub- 
quadratus, 2dus multo brevior, 4tum angulo apicali interno gerens. 
G. 9. Varnivia, White.—Articulus maxillipedis externi 8tius ob- 
longus, 2dus transversus. [Carapax margine antero-laterali 4-dentatus.] 
Pedes longi. 
G. 3. Porauia, Latr.—Articulus maxillipedis externi 3tius subquad- 
ratus, apice subtriangulatus anguloque apicali 4tum gerens. 
