168 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Trichopeltarium Alcock, Journ. Asiat. Soc. Bengal, vol. 68, 1899, pp. 96 aud 99. 



Garapace subcirciilar, broader than long or nearly as broad as long, 

 strongly convex, borders spinate. Front prominent, not very broad, 

 cut into three sharp teeth or spines. Orbits shallow, defined by spines 

 separated by wide gaps; inner suborbital angle spiniform. Eye-stalks 

 slender. Basal article of antenna short, subcylindrical ; flagellum 

 coarse, stout, setaceous. Epistome of fair length, fairly well defined, 

 sunken, and overlapped by the external maxillipeds. Buccal orifice 

 square-cut, longer than broad, not completely covered by the outer 

 maxillipeds, which are somewhat elongate and have the merus a 

 little narrower than the ischium. Efferent branchial channels defined 

 by ridges which do not reach the epistome. Chelipeds massive and 

 unequal in the male. Legs stout, hairy, more or less spiny, ending 

 in stout, styiiform dactyli; they are longer and nearly as massive as 

 the female chelipeds. (After Alcock.) 



Caribbean Sea and Indian Ocean, in deep water. 



TRICHOPELTARION NOBILE A. Milne Edwards 



Plate 73 



Trichopeltarion nobile A. Milne Edwards, Bull. Mus. Coinp. Zool., vol. 8, 1880, 

 p. 20, pi. 2 (type-locality, off St. Lucia, 151 fathoms; type in Mus. Comp. 

 Zool). 



Diagnosis. — Carapace broader than long; surface thickly velvety 

 as in Dromia. Median frontal spine shorter than the lateral ones. 



Description. — Carapace broader than long, much swollen, covered 

 with a short thick velvet through which the bare spines protrude; a 

 prominent median carina. Of the frontal spines the median is shorter 

 than the lateral. Second movable article of antenna reaching nearly 

 as far as outer frontal spines. Superior orbital border emarginate, 

 armed inwardly by a spine enlarged at base, followed by a smaller 

 middle spine, and an outer, somewhat larger spine; orbit shallow, eye 

 very slender, much reduced and curved; inner suborbital angle tri- 

 angular, spine-pointed, directed slightly inward. Orbital and lateral 

 spiifes bordered with spines. Antero-lateral borders armed with three 

 large spines or teeth, bifurcate or trifurcate; the strongest is at the 

 middle of the branchial region; posterior border ornamented with 

 pointed tubercles or small spines. Other similar tubercles are found 

 in the metabranchial and intestinal regions as well as along the 

 postero-lateral margins. Branchio-cardiac furrows very deep. Che- 

 lipeds very unequal; the major (right) one enormous and almost entirely 

 smooth; some spinules on the posterior margin of the arm, the inner 

 border of the wrist and the superior border of the palm. Minor che- 

 iiped very small, compressed, hair}^ and spinous. Legs hairy, rather 

 long, armed above with a row of spines or spinules which are strongest 

 on the first leg and diminish on the succeeding legs. 



