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130 Scientific Intelligence. 



G. Arenjeus, Dana, — Lup<2 affinis. Carapax valde latus, antice 

 arcuatus. Pars antennae externae mobilis hiatu orbitaj insila. 

 Manus prismatica.* 



3. FORTUNING. — Sutura sternl mediana segmenta duo intersecans. 

 CollicLiIi palaii ssepius obsoleti. 



G- PoRTUNUs, Fair, — Angustus, margine antero-Iaterali breviore 

 quam postero-lateralis, 



Fam. IV, PLATYONYCHID^. 



Pedes postici natalorii, tarso laminato. Ramus maxillipedis Imi in- 



ternus lobo interne non instructus. Palatum colllculo ulrlnque non divi- 

 sum. Corpus anguslum. 



G, 1. Carcinus, LeacLf — Pedes postici male natatorii, tarso an- 

 gusle lanceolato. Carapax parce transversus. 



G. 2. PoRTUMNus, Leach, — Pedes 5ti natatorii lantum, tarso lan- 

 ceolato, acuto. Carapax non latior quam longior* 



G- 3. Platyo^^yciius, ia^r.J^Pedes 5ti naialorii tantum, tarso 

 lalo, elliptico. Carapax latior quam longior. 



G. 4. PoLYBius, Leach, — Pedes 2di, 3tii, 4ti, 5ti toti natatorii, 

 tarsis tate lanceolatis. 



Fam. V. PODOPHTHALMIDiE. 



Pedes postici natatorii^ tarso laminalo. Ramus maxillipedis Imi 

 internus lobo inlerno instructus. Corpus latum, amice valde iransver- 

 sum, orbitis oculisque longissimis. 



G. PoDOPHTHALBius, Laruarch 



Legio IL TELPHUSINEA, tel CANCROIDEA 



GRAPSIDICA. . 



Fabi. L TELPHUSIDiE. 



Carapax subquadratus aut orbiculato-quadratus* Palatum colliculo 

 ulrinque ssepius divisum. [Species Eriphiis paulo affines.] 



G. 1. Telphitsa, Latr. — Articulus maxillipedis externi Slius sub- 

 quadratus, 2dus oblongus, Carapax subquadratus. 



G. 2. Trichodactylus, Latr. — Articulus maxillipedis externi 

 3lius subtriangulatus, 2dus oblongus. 



* Tliis genus is instituted for the Lupa cribraria, which diifers from the other 

 Lupas in the characters stated. This species occurs in the shallow waters off a sand 



DC£kCn 



f Xaiva of M'Leay (Smith's lilust. Zool. S. Africa) is described as near Qarcinus. 

 The narrow form is the same ; the antero-hiteral margin 1 -dentate and shorter than 

 the postero-lateral ; the tarsus of the 5th pair of legs wider than iu Carcinus ; the 

 Sd joint of the outer maxillipeds subquadrate and carinate at base, with the inner 

 margin emargiaated for the next joint just above its middle, a form which occurs m 

 Platyonychus. 



± Ankavwi of De Haan. Faun. JaDOEu 



