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430 Scientific Intelligence. 
G. 5. ScvnA, Dana.*—Carapax gibbosus, rostro mediocri, lami- 
nato, cornubus acutis, dente przorbitali acuto. Margo orbitalis 
superior paulo unifissus. Articulus antennarum ext. Imus om- 
nino angustus, 2dus depressus. 
Ur. D. HyASTENUS, White.-— Chorino affinis. Rostrum I0 
cornubus non depressis, ante poneque .oculos directus. Margo 
orbitalis superior unifissus. . Pedes 2di longiores. 
.9. PYRIN/E.—Carapax subpyriformis. Pedes 8 postici valde compressi. 
G. l1. Pynra, Dana.—Carapax depressus, inermis, rostro lamellato, 
cornubus ovatis. Oculi perbreves, orbitá spinis non armatá. 
b. OCULI LONGITUDINALITER PORRECTI, CARAPACE ANTICE 
'TRUNCATO. 
10. OTHONIN/E.—Carapax antice late truncatus, rostro fere b oso. 
Oculi elongati, cylindrici. 
G. OrBONIA, Bell. —Carapax parce oblongus, suborbicularis, 
rostro bifido. Antenns internze minutissimze ; externe late, 
articulo 1mo lato, 2do valde depresso, inverso:subiri&ngulete, 
, 
B. Carapax paulo transversus. 
81. SALACINZE.—Carapax fere orbicularis. Pedes 8 postici crassi, 
longi, articulo penultimo infra recto. Rostrum fere obsoletum 
integrum. 
G. SaLAciA, Edwards et Lucas.S—Carapax gibbosus. Fossa an- 
tennalis sub rostro partim excavata. ^ Articulus maxillipedis 
externi 3tius medio apice emarginatus, hocque emarginatione 
articulum proximum gerens. nacho Grapsoque affinis. - 
2. DIGITI APICE OBTUSI, INSTAR COCHLEARIS EXCAVATI. 
12. MITHRACINJE.—Oculi mediocres. Carapax sive paulo oblongus, 
sive transversus. 
G. 1l. Mirgnax, Leach.||—Carapax ssepe orbiculato-ovatus, inter- 
dum transversus. Rostrum aut saliens aut fere obsoletum, bifi- 
dum. Articulus antennarum ext. Imus apicem externum dua- 
bus spinis longis armatus. 
, 
* This volume, p. 269. 
1 Ann. Mag. Nat. Hist, [2], xx, 61, and Crust. Voy. of Samarang, p. 11. The species 
is Seba's fig. 12, pl. 18 of the Thesaurus. 
t Zool. Trans. ii, 55. 
$8 Crust. in D'Orbigny's S . Amer, 12, pl. 11. 
|| The characters given by White for his genus Schizophrys (Ann. Mag. N. H. [2]. 
ii, 282, 283, and Voy. Samarang, Crust., p. 16) do not serve to exclude the species 
from Paramithrax, Maia or Mithrax. The peculiarity of the orbit described and of 
the 1st joint of the outer antennz, as far as understood by the writer from the 
description, are the same as in the genera just mentioned.. 
The genus Dione of De Haan (Fauna Japon. Crust. p. 82,) differs from Mithrax 
only in not having the interior apex of the third jcint of the outer maxillipeds pro- , 
ject inward a little over the insertion of the fourth joint. I£ corresponds to * Mithras 
4riangulaires" of Edwards. : 
