124 Scientific Intelligence. 
the Portunidze, are the Cancrinea Typica Natatoria; the Platyonychidz, 
the Cancrinea Corystidica Natatoria; the Podopthalmidz, the Can- 
crinea Grapsidica NNatatoria. Again, among the subfamilies of Can- 
cride, the Cancrinz, are the. Cancride Corystidice ; the Xanthinze 
and Chloroding, the Cancride Typice. 
The following is a synopsis of the known genera of Cancroidea.— 
Lre:0 L. CANCRINEA, veL CANCROIDEA 'TYPICA. 
Fax. I. CANCRID/JE. 
Pedes postici gressorii. Ramus maxillipedis Imi internus simplex. 
Palatum (vel area praelabiata) colliculo ad marginem anticum producto 
non divisum. . Carapax sepius late transversus, interdum angustus. 
1. CANCRINJE.—Antennz internze plus minusve longitudinales. Frons 
interorbitalis perangustus. Digiti acuminati. 
G. 1. CawcER,* Leach.—Pars antennz externz mobilis hiatu. or- 
bite omnino exclusa. Carapax latissimus. 
G. 9. PriRIMELA, Leach.—Pars antenne externes mobilis hiatu or- 
bitee non exclusa. Carapax perangustus. 
2. XANTHINJE.—Antennze interne plus minusve transverse. AÁn- 
tennz externz basi firmé infixe, parte mobili hiatu orbitee non ex- 
clusá. Frons interorbitalis latior. Digiti acuminati. 
.l. Regio carapacis postica convexa. —Orbita hiatu externo non 
interrupta. 
G. 1l. ArzzaartS, De Haan.t—Margo antero-lateralis postero-lat- 
erali longior. Pedes 8 postici compressi, cristati. 
G. 9. CanriLIUS, Leach, De Haan.—Margo antero-lateralis pos- 
tero-laterali longior. Frons sepissime bene 4-lobatus. Ramus 
maxillipedis 1mi internus lobato-furcatus. Pedes 8 postici nudi, 
subcylindrici, non cristati. 
G. 3. LiouERA, Dana.1—F rons leviter 2- lobatus aut rectiusculus. 
Margo antero-lateralis postero-laterali non brevior. Ramus max- 
illipedis Imi internus non lobatus. Pedes 8 postici nudi, sub- 
cylindrici, non cristati. 
G. 4. Liacona, De Haan.$ —Margo antero-lateralis postero-late- 
rali brevior. Frons leviter 2-lobatus aut rectiuseulus. Pedes 
nudi, tarsis exceptis. Ramus maxillipedis 1mi internus non 
lobatus. 
* Platycarcinus, Milne Edwards, Crust. i, 412. 
T Faun. Japon. 17.— Cancer. of Edwards, Crust, i, 372; and Platypodia of Bell, 
Zool. Trans. i, 335, 1835. 
[ Includes "Carpilius cinctimanus of White, Crust. Voy. Samarang, 81, pl. "of 
The lobato-furcate form of the inner branch of the 1st pair of maxi lipeds i in Carpi. 
lius maculatus and the allied, is so peculiar, as shown by De Haan, that dt must be 
admitted as a generic distinction. "The true Carpilii have a stro agly 4-lobed margin 
to the front, though the front is sometimes so bent downward that tl e lobes are not 
seen in a vertical view, though distinct in a front view. dioit 
S Faun. Japon. 19. ; 
