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Zoology. 129 



I 1. LUPIN.E. — Sutura sterni mediana segmenta Iria intersecans. Palati 



colliculi promlnentes. 



1. Pars antenna> externa mohilis hiaiu oriitce non occlusa^ orbitd 



jacendo aptata. 



F 



G. 1. ScYLLA, De HaanJ^ — Valde latus et crassus, marginlbus 



anterioribus sirnul sumtis bene arcuatus, antero-lalera!i longiore 



quam postero-Iateralis. Pedes antici breviores, crassissimi, manu 



valde tumida, non angulata vel prismatica. 



G. 2. LuPA, Leach.f — Valde latus, marginibus anterioribus tolis 



% simul sumtis bene arcuatus. Manus elongate trigona aut pris- 



I niaiica, costata. 



G. 3. Amphitrite, De Haan^\ Dana. — Angustior. Margines fron- 

 talis antero-lateralisque angulo convenientes, antero-Iaterali raro 

 breviore quam postero-Iateralis, Manus elongata, prismatica. 

 Basis antennae externse crassus, hiatu orbltse parce angustior. 

 I G. 4. Caritpa, Dana, — Transversus. Margines frontalis antero- 



lateralisque angulo convenientes, fronte recto, emarginato- Basis 

 antennie externce subcylindricus, hiatu orbitse multo anguslior. 



2. Pars anfemicE externcB mohilis hiatu orbitce omnino per basis proces- 



sum occlusa^ orbitd plus minusve remota, 



G, 5. Thalamita, Lair — Latus. Frons dimidio latitudinis cara- 

 4w pacis longior; margo antero-laleralis longitudinalis. Articulus 



antennae externse Imus prselongus, 2dus orbita remolissimus. 

 Pedes antici longi, manu elongata. 

 G. 6. Charybdis, De Haan^ Dana.'^ — Anguslior. Frons dimidio 

 latitudinis carapacis brevier; margo antero-Iateralis obliquus, 

 Articulus antennae externfc Imus paulo oblongus, 2dus orbita 

 paulo remotus- Pedes antici longi, manu elongata. 

 G. 7. LissocARCiNus, White,\\ — Suborbiculatus, Isevis, subporcel- 

 I lanus. Articulus anlennse externse Imus brevis, fere longitudi- 



nalis, articulo sequente orbita parce remolo. Pedes nudi ; antici 

 breves, brachio ultra carapacem vix saliente, manu perbrevi. 



2. AREN^EINiE. — Sutura sterni mediana segmenta tria intersecans. 

 Palatum colliculo utrinque non divisum. Ramus maxillipedis Imi 

 iniernus ad apicem late transversim triangulatus lineamque media- 

 naoi fere attingens. 



Faun. Japon. 11. 



xaun. Japon. 11. 



T Neptunus, Pontus and Ackelous of De Haan, (Faun. Japon., 8, 9,) the distinc- 

 loosbetween which genera appear not to be sustained. 



\ Faun. Japon. 8. Includes, as here adopted, the Lupa of De Haan, which di- 

 Y^ion he restricts to the Lupa forceps (E<hr. Crust, i, '^b^l The Lupocyclm of 

 Adams and White, (Crust. Voy. Samarang, 47, pi 12, f. 4,) appears to be idouticid 

 ^^ Ampliitrite. 



SPauna Japon. 10. Includes both Charybdis and Oceanus of De Haan, which 

 ^*^T*^^ ^^lade into one another by imperceptible gradatirtns, and are not distin- 

 guwhed by any important characters. Corresponds to the " Tbalamites Hex 

 liales" of Edwirds, 



A ^nist. Voy. Samarang, 45. We hare taken the generic characters from a ap 

 couected by us, m connection with the description by White. 



Second Series, Vol. XI, No. 81.— July, 1851. It 



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