Z oology. | 121 
narum lmus elongatus hiatum bene occupans. Articulus max- 
. Mlipedis externi Stius oblongus, apice oblique truncatus, in mar- 
ginis interni emarginatione articulum 4tum gerens. - 
G. 3. PErTARION, Hombron et Jacquinot. *—Carapax suborbicu- 
laris, ante medium latior, fronte triangulaté rostrato. Articulus 
antenne externe lmus perbrevis, 2do parce erassior.  Articu- 
lus maxillipedis externi 3tius non oblongus, apice truncatus. 
Articulus pedum 8 posticorum BDtus 4to vix brevior. 
G. 4. PsEuDocoRvsrEs, Edwards.—Carapax suborbicularis, parce 
oblongus, triangulaté rostratus. Articulus maxillipedis externi 
3tius vix oblongus. Articulus pedum 8 posticorum 5tus 4to duplo 
i brevior. 
: G. 5. GonMEza, 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 sequi. 
G. 6. Ozipi4, DeHaan (partim).t—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. 
1 G.'7. ConvsTES, Latreille.—Carapax oblongus, rostratus. Oculi 
mediocres. Articulus maxillipedis externi 3tius angusté oblongus 
. 2do vix brevior. 
"wp 
oe Sd - 
e send. 9. Pedes postici natatorài. 
. ..G. 8. Drcgga, DeHaan. $—Carapax oblongus, rostro late triangu- 
lato. Pedes postici natatorii, tarso CAE MMES Articulus max- 
fs illipedis externi 3tius angusté oblongus, 2do parce brevior. 
9. Conspectus Crustaceorum, &c.— Conspectus of the Crustacea of the 
^ Exploring Expedition under Capt. Wilkes, U.S.N.; by James D. Dawa. 
.—PAGURIDEA, (Proc. Acad. Nat. Sci., Philad., 1851. p. 967.) — 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.  'T'here are, how- 
E in his arrangement, discrepancies between the characters of the 
- Species and those faid down for his subdivisions which we find it diffi- 
-. eult 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 ** Semestres," 
" 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. 
4 Oeidia Haanii (partim), Faun. Japon. 15. Species Oeidie typica (O. 20-spi- 
n0sa, denominata) G'omeza vera est. 
i Faun. Japon. 15. Species Oeidia 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 distincta ferme similis. 
$8 Faun. Japon. 14, (1833). autilocorystes, Edwardsii, Crust. ii, 149 (1831). 
. 
Ad 
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^ 
o0 7 PBECTTNIS NN er Ae. 
Eon the hands are nearly equal in the former, aud the right is the: 
