OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 33 



DROMIDIA ANTILLENSIS Stimpson 



Figure 12; Plate 7, Figures 1-3 



Dromidia antillensis Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, p. 71 

 [25], 1858 (type localities, St. Thomas, Key Biscayne, and Tortugas, Fla.; 

 cotypes in M. C. Z.). — Verrill, Trans. Connecticut Acad. Sci., vol. 13, 

 p. 431, fig. 51 [?], pi. 28, fig. 3 (not fig. 2, which is Dromia erythropus), 1908. — 

 Hay and Shore, Bull. U. S. Bur. Fish., vol. 35 (1915-16), p. 417, pi. 31, 

 fig. 5, 1918.— BooNE, Bull. Vanderbilt Mar. Mus., vol. 2, p. 42, pi. 7, 1930. 



Diagnosis. — Carapace longer than broad, lateral margins of poste- 

 rior two-tliirds subparallel. Fron to-orbital border in adult half width 

 of carapace, in small specimens more than half. The branchial 

 furrow running inward from the last lateral tooth is shallow. Cardiac 

 furrows shallow. Carapace moderately deflexed in front. 



Description. — Body everywhere short-pubescent, with longer hairs 

 on sides and feet. Carapace somewhat longer than broad, strongly 

 convex, smooth. Frontal region longitudinally grooved along the 



Figure 12.— Dromidia antillensis, male (42913): Outline of carapace, X2. 



middle. Front strongly deflexed and 5-toothed (supra-ocidar teeth 

 included); teeth small and slender, almost spiniform, horizontally 

 projecting; the median three subequal, and about as long as the 

 distance between them at their bases; teeth over the eyes shorter but 

 acute. External angles of orbit prominent but obtuse. Lateral 

 margin of carapace 4-toothed, and deflected anteriorly toward the 

 corners of the buccal area, where there is a tubercle. First three 

 teeth of lateral margin subspiniform ; posterior one, situated at lateral 

 sulcus, as large as the others but less acute. External maxillipeds 

 elongate; merus large, longer than ischium, with its antero-exterior 

 corner prominent, forming a right angle. Chelipeds rather short and 

 stout, nearly smooth, inferior edges of ischium and merus-joints 

 granulated; carpus dentated at anterior angles with small teeth; hand 

 short, smooth externall}^; palm shorter than dactylus, and armed w^ith 

 two or three small spiniform tubercles on basal half of superior margin. 

 Ambidatory legs rather slender, smooth. Last pair of legs much 

 longer than penidt pair. Penult joint of abdomen in male elongated 

 and slender; terminal joint longer than broad. (Stimpson.) 



