358 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Measurements. — Male: length 5.4 mm, width 8.1 mm; female: 

 length 5.6 mm, width 8.6 mm. 



Color in life. — Pure white. 



Habitat. — Rocky shore. 



Depth. — Shore 



Remarks. — A minute species, but positively identifiable in the field 

 because of its pure white, elliptical, eroded carapace. \]. ellipticus is one 

 of the few oxystomatous crabs not dredged, and like Dynomene Ursula 

 Stimpson was not known in the Galapagos Islands prior to the advent 

 of Velero III collectors. 



Subfamily PhILYRINAE 



Genus PERSEPHONA Leach, 1817 



Persephona edwardsii Bell 



Persephona edwardsii Bell, Trans. Linn. Soc. London, vol. 21, p. 294, 

 pi. 31, fig. 8, 1855. Rathbun, Bull. 166, U.S. Nat. Mus., p. 154, 

 pi. 45, figs. 3, 4, and synonymy, 1937. 



Type locality. — Galapagos Islands. 



Types.— In Mus. Bell. 



Range. — From Panama (Stimpson) to Cape San Francisco, Ecuador 

 (Velero III) ; Galapagos Islands (Bell). 



Diagnosis. — Three posteriorly directed carapace spines; subhepatic 

 spines wanting. Length and breadth of carapace subequal, a distinct lateral 

 line of granules. Palm high, width equal to more than half of length. 



Material examined. — None from Galapagos. Hancock collections con- 

 tain specimens from Pt. Piaxtla, Mexico, to Cape San Francisco, Ecuador, 

 the first an unpublished record. 



Genus LEUGOSILIA Bell, 1855 

 Leucosilia jurinei (Saussure) 



Guaia (Ilia) jurinei Saussure, Rev. Mag. Zool., no. 8, p. 65 (12), pi. 13, 



fig. 4-4b, 1853. 

 Leucosilia jurinii Bell, Trans. Linn. Soc. London, vol. 2, p. 295, pi. 32, 



fig. 1, 1855. 

 Leucosilia jurinei Rathbun, Proc. U.S. Nat. Mus., vol. 38, p. 552, pi. 45, 

 fig. 1, 1910; Bull. 166, U.S. Nat. Mus., p. 170, pi. 48, figs. 1-8, and 

 synonymy, 1937. 



Type locality. — Mazatlan, Mexico. 

 Type. — In Geneva Mus. 



