OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 73 



Family LATREILLIIDAE Alcock 



Latreilliidae Alcock, Journ. Asiat. Soc. Bengal, vol. 68, p. 130, 1899. 



Carapace elongate-quadrangular or pyriform. Basal article of 

 eyestalk very much longer than terminal article. Antennal flagella 

 not so long as carapace. Outer maxillipeds suboperculiform. Gill 

 plumes eight on either side; no epipodites to chelipeds or legs. 



Genus LATREILLIA Roux 



Latreillia Roux, Crustac^s de la Mediterranee et de son littoral, p. (1), 1828 

 (type, L. elegans Roux). — Alcock, Catalogue of the Indian decapod Crus- 

 tacea in the collection of the Indian Museum, pt. 1, fasc. 1, p. 70, 1901. 



Proctor GiSTEL, Naturgeschichte des Thierreichs, p. ix, 1848; substituted for 

 Latreillia because named for a man. 



Carapace elongate-pyriform, not covering basal articles of legs, its 

 anterior part prolonged to form a subcylindrical "neck" at the end of 

 which are the spiniform rostrum Gying deflexed between two long 

 slender divergent "supra-ocular" spines), the eyes, antennules, and 

 antennae. Regions fairly well indicated; no linea anomurica. Eyes 

 large, the slender basal article of the eyestalk being several times longer 

 than the terminal article. Antennules inserted behind the eyes, first 

 article very large, globular and swollen, other articles filiform; an- 

 tennae behind the antennules, first article small, globular, second and 

 third elongate. Epistome of great length. Buccal cavern well de- 

 marcated, efferent branchial channels well defined. Outer maxillipeds 

 not completely closing the buccal orifice; they have a pediform cast, 

 the ischium and merus being rather narrow and the flagellum coarse. 

 Chelipeds long and slender, but much shorter than the first three pairs 

 of ambulatory legs; all the articles are slender except the palm, which 

 in one or both sexes is club-shaped; fingers shorter than palm. First 

 three pairs of ambulatory legs very long and slender; some of their 

 articles are spiny. Last pair of legs more or less reduced in length, 

 subdorsal. Abdomen of male with seven separate segments; of female 

 with segments 4, 5, and 6 fused. (After Alcock.) 



Atlantic coast of North America; off Canaries and Azores; Mediter- 

 ranean Sea; South Africa; Indian Ocean; Japanese Seas; and New 

 South "Wales. 



LATREILLIA ELEGANS Roux 



Figure 18; Plate 20; Plate 21, Figures 1-8 



Latreillia elegans Roux, Crustac^s de la Mediterranee et de son littoral, p. (2), pi. 

 22, 1828 (type locality, Sicily; type in Mus. Hist. Nat. Marseille). — Milne 

 Edwards, Histoire naturelle des Crustac^s, vol. 1, p. 277, 1834. — Lucas, 

 Exploration scientifique de I'Algerie . . . 1840-42, vol. 1, Animaux articul^s 

 p. 3, pi. 1, fig. 1, 1849. — Heller, Die Crustacean siidlichen Europa, p. 147 

 pi. 4, fig. 14 (after Lucas), 1863.— Smith, Proc. U. S. Nat. Mus., vol. 3, p 

 419, 1881; Ann. Rept. Comm. Fish and Fisheries for 1882, p. 351, pi. 2, fig 

 2, 2a, pi. 3, fig. 1, 1884; for 1885, p. 637 [33], 1886.— Bouvier, Bull. Soc 

 Philom. Paris, ser. 8, vol. 8, p. 64 [31], fig. 26, 1896.— Alcock, Catalogue of 



