148 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Measurements. — Male (17290), length of carapace 46.5, width of 

 same 76, fronto-orbital width 60, greatest width of front 12 mm. 



Range. — West coast of Mexico? (A. Milne Edwards). Central 

 America to Chile. 



Material examined. — 



PANAMA.— 1 male (17290), purchased from H. A. Ward. 



Montuosa Islet, N. 12° W., 12 miles; lat. 7° 17' N., long. 82° 11' 

 W.; sm^face; October 20, 1904; station 4619, Albatross; 1 female 

 (33369). 



PERU.— Paita, Hassler Exped., 9 females (21320), received from 

 the Museum of Comparative Zoology. 



CHILE. — Talcahuano, specimen in M.C.Z. 



EUPHYLAX ROBUSTUS A. Milne Edwards 



Plates 66 and 67 



Ewphylax robustus A. Milne Edwards, in Les fonds de la mer, by Fischer, Folia 

 and Perier, vol. 2, 1874, p. 249 (type-locality, Mazatlan; type in Paris Mus.) ; 

 Crust. Reg. Mex., 1879, p. 205, pi. 37. 



Diagnosis. — Three strong, spines on antero-lateral margin. Cara- 

 pace with granulated lines and prominences. Lower orbital plate 

 granulated. Otherwise as in E. dovii. 



Description. — A granulated epigastric Jine; a similar line runs from 

 the base of the lateral spine transversely inward, not reaching the 

 branchio-cardiac suture. Prominent parts of carapace granulated, 

 granules little apparent. Supra-orbital border more granulate than 

 in dovii. The upper surface of the advanced lower orbital plate is 

 ornamented with distinct granules. Lateral border of carapace 

 granulated and with three strong spines, the first most developed, 

 and a small spine in the first interspace. (After A. Milne Edwards.) 



Color. — Carapace greenish; chelae same color above and yellowish 

 inside and below; ambulatory legs reddish yellow. (A. Milne 

 Edwards.) 



Measurements. — Female, holotype, length of carapace 56, width of 

 same 90, fronto-orbital width 79 mm. (A. Milne Edwards.) 



Range. — Known only from the unique type from Mazatlan, Mexico. 



Relation. — Perhaps conspecific with E. dovii. Its peculiarities may 

 be due to its greater size. 



Family ATELECYCLIDAE 



Atelecyclidae (p. 421) + Cheiragonidae (p. 419) Ortmann, Zool. Jahrb., Syst., vol. 7, 



1893; Bronn's Thier- Reich, vol. 5, pt. 2, 1898, p. 1169. 

 Alelecydinae (p. 99) + Corystidae, part (p. 103), Alcock, Journ. Asiat. Soc. 



Bengal, vol. 68, 1899. 

 Atelecyclidae Borradaile, Ann. Mag. Nat. Hist., ser. 7, vol. 19, 1907, p. 481. 



The antennules fold lengthwise. The movable part of the antennae 

 is either well developed and hairy or rudimentary or altogether 



