220 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 21 



Genus LEUGIPPA Milne Edwards 



Leucippa Milne Edwards, 1833, p. 512; 1834, p. 345. Rathbun, 1925, 

 p. 184. 



Type: Leucippa pentagona Milne Edwards, 1834, by monotypy. 



Description: Carapace triangular and extending laterally above the 

 base of the legs in the form of a horizontal lamina ; orbits incomplete ; 

 rostrum broad, horizontal, and concealing the base of the external an- 

 tennae. Legs provided above with a projecting crest which extends to the 

 origin of the last article. (Milne Edwards, 1833) 



Carapace subpentagonal or subtriangular, the length barely exceeding 

 the width; lateral margins dentate or lobed. Rostrum horizontal, wide, 

 lamellate, two-horned. A preorbital and a postorbital tooth present. Eyes 

 small, penduncle very short. Basal article of outer antennae short; next 

 two articles concealed under the rostrum. Epistome of moderate size; 

 merus of outer maxillipeds much dilated outwardly, slightly truncate at 

 the anterior inner angle, a small sharp tooth in front of insertion of palp. 

 Legs short, compressed. 



Abdomen with seven segments free in both sexes. (Rathbun) 



Range: Atlantic Ocean from Cape St. Roque, Brazil, to Gulf of San 

 Mathias, eastern Patagonia; Pacific Ocean: "Chile," including Strait of 

 Magellan, and west coast of Lower California, Mexico, at Magdalena 

 Bay, 51 fathoms. 



Leucippa pentagona Milne Edwards 

 Plate O, Fig. 2; Plate 25, Fig. 4 



Leucippa pentagona Milne Edwards, 1833, p. 517, pi. 18B, figs. 1, 2 

 (pantagona on plate) ; 1834, p. 347, pi. 15, figs. 9, 10. Milne Ed- 

 wards and Lucas, 1843, p. 9. Nicolet, 1849, p. 132. Rathbun, 1898, 

 p. 572; 1910, pp. 571, 613; 1925, p. 184, pi. 61 ; pi. 222, figs. 7-9, 

 text-fig. 72. Moreira, 1901, pp. 66, 139. Doflein and Balss, 1912, 

 p. 36, text-fig. 4. Garth, 1957, p. 26. 



Leucippa ensinadae Audouin, in De Haan, 1839, pi. G. See also Hol- 

 thuis, 1953, p. 41. 



Leucippa ensenadae Milne Edwards and Lucas, 1843, p. 9, pi. 5, figs. 

 3, 3a, 3b; type locality, "l'Ensenade de Ros," Patagonia; type in 

 Paris Museum. 



Leucippa laevis Dana, 1851a, p. 273; 1852, p. 135; 1855, pi. 6, figs. 

 5a-c ; type locality, Rio de Janeiro ; type not extant. 



Leucippa levis, Smith, 1869, p. 33. 



