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124 Scientific Intelligence. 



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the Portunidse, are the Cancrinea Typica Natatoria; the Platyonychidse, 

 the Cancrinea Corystidica Natatoria; the PodopthalmidEe, the Can- 

 crinea Grapsidica Natatoria. Again, among the subfamilies of Can- 

 cridee, the Cancrince, are the Cancridce Corystidica; the Xanthinse 

 and Chlorodinse, the Cancridce TypiccB. 



The following is a synopsis of the known genera of Cancroidea. 



Legio L cancrinea, vel CANCROIDEA TYPICA. 



Fam. L CANCRli)^. 



Pedes postici gressorii. Eamus maxillipedis I mi internus simplex* 

 Palatum (vel area prselabiata) coUiculo ad marginem anticum producto 

 non divisum. Carapax scepius late transversus, interdum angustus, 



1, CANCRIN^. — Antennae internse plus minusve longitudinales, Frons 

 interorbitalis perangustus. Digiti acuminati, 



G. 1. Cancer,* Leach, — Pars antennae exlernag mobilis hiatu or- 



bilse omnino exclusa. Carapax lalissimus. 

 G. 2. PiRiMELA, Leach. — Pars antennae externse mobilis hiatu or- 



bitse non exclusa- Carapax perangustus. 



r 



2. XANTHINiE. — Antennse internee plus minusve iransversce. An- 

 tennae externae basi firme infixo), parte mobili hiatu orblice non ex- 

 clusa, Frons interorbitalis latior. Dicriti acuminati, 



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1. Regio carapacis posiica convexa. Orbila hiatu exlerno non 



interrupta* 



G. 1. Atergatis, De Haan.f — Margo antero-lateralls postero-lat- 

 erali longior. Pedes 8 postici compressi, cristati, 



G. 2. Carpilius, Leach^ De Haan. — Margo aniero-lateralis pos- 

 tero-lalerali longior. Frons sseplssime bene 4-lobalus. Ramus 



xillipedis Imi internus lobato-furcatus. Pedes 8 poslici nudi, 



subcylindrici, non cristati. 

 G. 3. LioMERA, Dana4 — Frons leviter 2-lobatus aut rectiusculus. 



Margo antero-Iateralis postero-laterali non brevior. Ramus max- 

 illipedis Imi internus non lobatus. Pedes 8 postici nudi, sub- 



cylindrici, non cristati. 



§ — Margo antero-Iateralis postero-late- 



rali brevior. Frons leviter 2-!obatus aut rectiusculus. Pedes 

 nudi, tarsis excepiis. Ramus maxillipedis Imi internus non 

 lobatus. 



* Jf^IatycarcinuSj Milne Edwards, Crust i, 412. 



f FauD. Japon. 17. — Cancer of Edwards, Crust, i, 3*72; and Platypodia of Bell, 

 Zool. Trans, i, 335, 1835. 



\ Includes Carpilius cindhnanus oi White, Crust. Voy. Samarang, 37, pi- 7, f. 4r. 

 The lobato- furcate form of the inner branch of the 1st pair of maxiilipeds in Carpi- 

 lius maculatus and the allied, is so peculiar, as sho^n by De Haan, that it must he 

 admitted as a generic distinctiou. The true Carpilii have a strongly 4-lobed margin 

 to the front, though the front is sometimes so bent downward that the lobes are not 

 seen in a vertical view, though distinct in a fi?ont view. 



§ Faun. Japon. 19. 





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