Zoology. 123 
Gen. 7. Crisananius, D.—Manus antice plus minusve depresse, 
subzquse, digitis apice corneis, in plano horizontali claudentibus. 
Frons medio breviter rostratus. 
II. CANCELLIN.E.—Abdomen symmetricum. 
Gen. CawxcELLus, Edwards. 
Fax. II. CENOBITIDAE. 
Antennz interne multo elongate, articulo 1mo oculis sepius longiore, 
valde deflexo.  Maxillipedis externi palpus flagello non instructus.— 
Species subterrestriales. 
Gen. 1. CENoBITA, Édw.—Corpus angustum, carapace elongato, 
fronte non rostrato. Abdomen in cochleam retortum, superficie 
plerumque carnosum. 
Gen. 2. Binaus, 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-Zealandie, 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. zequabilis, 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 JawEs D. DANA.—The genus Or- 
thostoma was referred by its describer, Dr. Randall, (J. Acad. Nat. Sci., 
Philad., viii, 121, pl. 5, 1840,) to the family Gecarcinide. 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 TTelphuside. "The 
male verges are situated as in T'elphusa, and not as in the Grapsoidea ; 
and in general habit, the described species is near Potamia and Tricho- 
dactylus. [t 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 TeIphusidz, are, then, as follows :— 
G. l. TELPHusa, Latr.—Articulus maxillipedis externi 3tius sub- 
quadratus, 2dus multo brevior, 4tum angulo apicali interno gerens. 
G. 9. Vanpivia, White.—Articulus maxillipedis externi Stius ob- 
longus, 2dus transversus. [Carapax margine antero-laterali 4-dentatus.] 
Pedes longi. 
G. 3. Porauia, Latr.—&Articulus maxillipedis externi Stius subquad- 
ratus, apice subtriangulatus anguloque apicali 4tum gerens. 
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