Zoology. 121 
narum lmus elongatus hiatum bene occupans. Articulus max- 
illipedis externi Stius oblongus, apice oblique truncatus, in mar- 
ginis interni emarginatione articulum 4tum gerens. 
G. 3. PErTaR10N, Hombron et Jacquinot.*— Carapax suborbicu- 
laris, ante medium latior, fronte triangulaté rostrato. Articulus 
antenne externe lmus perbrevis, 2do parce crassior.  Articu- 
lus maxillipedis externi 3tius non oblongus, apice truncatus. 
Articulus pedum 8 posticorum 5tus 4to vix brevior. 
G. 4. PsEvpoconvsrEs, Edwards.—Carapax suborbicularis, parce 
oblongus, triangulaté rostratus. Articulus maxillipedis externi 
3tius vix oblongus. Articulus pedum 8 posticorum 5tus 4to duplo 
brevior. 
G. 5. Gouzza, Gray.i—Carapax oblongus, fere ellipticus, trian- 
gulaté rostratus. Oculi parvi vel mediocres. Articulus maxil- 
lipedis externi 3tius vix oblongus vel transversus, apice trunca- 
tus. Articuli pedum 8 posticorum 5tus et 4tus fere equi. 
G. 6. Ozinia, DeHaan (partim).i—Carapax oblongus, antice non 
angustans, fronte breviter rostrato. Oculi permagni. Articulus 
maxillipedis externi 3tius latus, oblongus, 2do paulo brevior. 
Articuli pedum 8 posticorum 5tus et 4tus fere sequi. 
G."7. ConvsrEs, Latreille.—Carapax oblongus, rostratus. Oculi 
mediocres. Articulus maxillipedis externi 3tius angusté oblongus 
2do vix brevior. 
2. Pedes postici natatorüi. 
G. 8. Dricgna, DeHaan.S—Carapax oblongus, rostro late triangu- 
lato. Pedes postici natatorii, tarso falciformi. Articulus max- 
illipedis externi 3tius angusté oblongus, 2do parce brevior. 
2. Conspectus Crustaceorum, óc.— Conspectus of the Crustacea of the 
Exploring Expedition under Capt. Wilkes, U.S.N. ; by Jaugs D. Dana. 
—PAGURIDEA, (Proc. Acad. Nat. Sci., Philad., 1851. p. 267.) — This 
paper contains a distribution of the Paguridea into genera, and also a 
description of new species. "The natural groups have been partly indi- 
cated by Milne Edwards in his work on Crustacea, and more lately in 
the Annales des Sciences Naturelles for 1848, p. 59.  ''here are, how- 
ever, in his arrangement, discrepancies between the characters of the 
species and those laid down for his subdivisions which we find it diffi- 
cult to explain. Such are, the placing of Pagurus tibicen and some 
related species with his *ZEquimanes," when the left hand is very much 
the larger, and the guitatus and granulatus with the ** Senestres," 
although the hands are nearly equal in the former, and the right is the 
larger in the latter. Still his sections are in the main natural groups, 
and some of them have more important points of distinction than this 
distinguished author has mentioned. 
* Hombron et Jacquinot, * Voy. au pole Sud," tab. 8, f. 1. 
1 Oeidia Haanii (partim), Faun. Japon. 15. Species Oeidi& typica (O. 20-spi- 
1088 denominata) G'omeza vera est. 
1 Faun.Japon. 15. Species Oveidia distincta Haanii, typus est generis Oeidiz 
accepti. Genus idem est Jonas, (Hombron et Jacquinot, * Voy. au pole Sud." tab. 8, 
f 4-8.) Species J. maerophthalmus, oculis grandibus formá characteribusque aliis, 
Oeidic distincte ferme similis. 
S8 Faun. Japon. 14, (1833). Nautilocorystes, Edwardsii, Crust. ii, 149 (1837). 
