Botany and Zoology. 445 
__ Porcettana, Lam’k, restrictum. Carapax pen longior quam latior, lateri- 
~ bus ca qo epimeris integris. Frons sat lata, prominens, , plus minusve dentata. 
unde. Antennarum 
— Orbitee articulus shag’ vale productus, intus acutus. 
; ciples st sat depress; carpo brevi, margine riore intus sepius unilobato; 
sepiu gpa: cued Pedum amb. dactyli note sat longi. Zypus, P. platy: 
ea, Lam’k; An. s. vert., v. 230.—Europa. 
aan RUS, Nov. gen. Se angu sett "hier tridentata. Antennule longi- 
ores, articulo primo o depresso, den Antennarum articulus primus ei 
- Sage sso Saar par shpbilis minuta, eerie ulata, quam art. primus non 
longior. pedes debiles Pedum amb. dactyli normales.— ey M. angustus. 
Beuiics on aa ana; loc. cit. i, 428, pl. xxvi, f. 12—Bras 
Porcettanetta, White. (Vo Lerten ii. 894.) ‘Carapax oblongus, multo 
— quam latior, ae fere poe llelis; lobulus gastricis obsoletis. Frons hori- 
is, laminiformis, valde oe nens, tridentata. Antenne ei Porcellane similes. 
Cha pee leeves, ca rp brevi, manu elongata. Pedes ambulatorii parvi, mero crasso, 
dactylis yeries, ‘uneinats, perme sis, multi-unguiculatis—7Z'ypus, P. triloba, White ; 
le, ii. 894, pl. vy, f. 2. 
Potroyyx, no pal Carapax rotundato ovalis, latior quam song convexus, 
its: Frons sat angusta, recta. oo nularum articulus primus non dentigerus. 
ntennarum articulus poo prelongus. Oculi ininat Chelipedes leves; mero 
a 
A list a all cee species mening to ocak of these proposed genera 
Is added, after much careful study of s 8. 
Under the Hippide there is the new nite Mastigopus, and under 
“siege Lepidopa. Among the Lithodea, the Lithodes hystrix of De 
n is referred to the new genus Acantholithus. Among the Paguridea, 
there are the new genera Petrochirus (for the Pagurus granulatus Oliv., 
M. Edw.), Isocheles (for the rile a equimanus Dana), and Spiropa- 
gurus ad the Pagurus spiriger De Haan). 
oires pour servir a P Histoire gp ehios du Menique, des An- 
tiles et ts Scones Unis; par Henrt px Saussure. Premiere livraison, 
tacés nouveaux du Mexi wigue et des “Aniilles 4to pamph. 
and 6 bites: Geneva, 1858.—The materials for this work were collected 
‘the author himself during his visit to America. The Mexican Crus- 
tacea are all from the eastern or Gulf shores. There are in all 1 Sifty-six 
ies described, forty-nine of which are believed by the author to be 
h : ; 
d 
a knowledge of the carcinologieal writings of Say an 
Gibbs would hate cated he cone to have rendered his work more 
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