124 — Scientific Intellisence. 
G. 4. 'TRicHopacTYvLUs, Latr.—Carapax marginibus subinteger. Ar- 
ticulus maxillipedis externi 2dus oblongus, 3tius vix oblongus, subtri- 
angulatus, margine terminali valde obliquo anguloque externo 4tum 
gerens, 2ndo multo brevior. 
G. 5. OnrnosrouA, Randall.—Carapax margine antero-laterali den- 
tatus. Articulus maxillipedis externi 2dus oblongus, 3tius oblongus, 
2do paulo brevior, apice obliquus, prope angulum exteriorem articu- 
lum 4tum gerens. 
4. Genus Heterograpsus of Lucas.—The genus Heterograpsus, de- 
scribed in the recent work on the Exploration of Algiers, and figured 
on plate 2 of Crustacea, f. 4, has the outer maxillipeds and most other 
characters of Pseudograpsus, Edw.,* but differs from that genus in 
having the sides nearly straight and convergent backward as in most 
Sesarmz, instead of arcuate. In the species described, the .H. sezden- 
talus, the antero-lateral margin is bi-emarginate. J« D. D. 
* See this Journal, xi, 2778. 
