. Bulletin - United States National Museum. Science. 134 BULLETIN 97, UNITED dTATES NATIONAL MUSEUM. segments fused, last segment subtriangular, widest, and laterally angled not far from sixth segment. Sexual variation.—Female somewhat larger and more swollen than male, frontal region more inclined, posterior margin wider, and wider than in female transversalis; fingers elongate and very slightly gaping, less slender than in female transversalis. Measurements.—Male holotype, length of carapace , width of same 11 mm. Female (TG39), length of carapace , width of same mm. Range.—Trinid
. Bulletin - United States National Museum. Science. 134 BULLETIN 97, UNITED dTATES NATIONAL MUSEUM. segments fused, last segment subtriangular, widest, and laterally angled not far from sixth segment. Sexual variation.—Female somewhat larger and more swollen than male, frontal region more inclined, posterior margin wider, and wider than in female transversalis; fingers elongate and very slightly gaping, less slender than in female transversalis. Measurements.—Male holotype, length of carapace , width of same 11 mm. Female (TG39), length of carapace , width of same mm. Range.—Trinidad (off Venezuela) and Monos Island, off NW. coast of Trinidad. Material examined.—Trinidad; shore; Jan. 30-Feb. 2, 1884; steamer Alhati^oss; 1 males (1 is holotype), 7 females (2 ovig.) (7G39). Monos Island, Trinidad; shore; Jan. 30-Feb. 2, 1884; steamer Albatross; 1 male (2313G). PINNIXA CRISTATA Rathbun. Plate 29, figs. 8 and 9. Pinnixa cristata IIathisun, Amer. JSat., vol. 34, 1900, p. 589 (type-locality, Beaufort, North Curoliiia; holotype female, Cat. No. 42817, ). Diagnosis.—Sharp crest across posterior part of carapace. Fingers gaping, thmnb short. Legs narrow; dactyls slightl}^ curved except last pair. Description of female.—Carapace very short, narrowed at either side; a high, sharp, transverse crest across carapace, ending above bases of last legs; surface punctate, wrinkled, and microscopically granulate; deep furrow behind gastric region; antero-lateral margin a raised crest, stopping short of hepatic region; posterior margin wide, concave. Front deflexed, not advanced; orbit no Avider than half of front. Chelipeds rather stout; palm suboblong, Fig. cristata, ^^^^h upper and lower margins convex, sur- oLTEit MAxiLLii-ED OF FE- facc covcrcd wltli a reticulate pattern of MALE noLOiirE, X o. ^^^ granulations; thumb short, subtriangu- lar, deflexed; a subbasal tooth on prehensile edge, also a small tooth near the tip, forming a truncate
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