OXYSTOMATOUS AND ALLIED CRABS OF AMERICA I5I 



Measurements. — Female, tj^^pe, St. Thomas, length of carapace 5.6, 

 breadth 8.1 mm; male (55203), length 4.6, breadth 6.7 mm. 



Range. — Florida Straits to St. Thomas. 



Material examined. — As follows: 



Florida: Smith Shoal, west of Key West; 4 to 5 fathoms; Fish 

 Hawk; 1 female (55204). Key West harbor; temp. 73.5° F.; Decem- 

 ber 20, 1912; station 7793, Fish Hawk; 1 male (55203). 



Cuba: Pomt Colorado, lat. 22°05' N., long. 84°2r W.; 2 to 3 

 fathoms; Sh. Grs. ; station 10; Henderson andBartsch; Tomas Barrera 

 expedition; 1 female (48522). 



Jamaica: P. W. Jarvis; 1 male (19425). 



Haiti: East coast of; lat. 19°09'50" N., long. 69°21'40" W.; 35 

 fathoms; February 16, 1933; station 53, Johnson-Smithsonian Expedi- 

 tion; 1 female (67823). 



Subfamily Philyrinae, new name 



Leucosiinae Alcock, Journ. Asiatic Soc. Bengal, vol. 65, p. 165, 1896 (part). 

 Iliinae (part) and Leucosiinae Ihle, Die Decapoda der Sihoga-Eixpedition, 

 Monogr. SGb^, p. 205, 1918. 



Carapace almost hemispherical, surface only slightly uneven. The 

 so-called frontal teeth are often well-developed inner-orbital angles. 

 A median frontal tooth may be present. Infraorbital lobe seldom 

 well developed, and usually the roof of the efferent branchial channel 

 reaches the same level. Epistome mostly reduced. The margins of 

 the mouth and of the pterygostome are chiefly or entirely in the 

 same transverse plane. Merus of external maxillipeds half or more 

 than half the length of the ischium measured along the inner border. 

 The first abdominal segment in female is often under the carapace. 



Genus PERSEPHONA Leach 



Persephona Leach, Zoological miscellany, vol. 3, pp. 18, 22, 1817 [type, P. 



latreillii Leach, 1817"= Cancer punctalas Linnaeus, 1758 (partini)]. 

 Guaia Milne Edwards, Histoire naturelle des Crustac6s, vol. 2, p. 127, 1837 



[type. Cancer pundalus Linnaeus, 1758 (partim)]. 



Carapace ovoid or globular, terminating posteriorly in three 

 spines — two on the border and one median higher up. Surface 

 smooth or granular, regions not all demarcated. Front well delimited 

 from remainder of carapace; the dentiform prolongations of the 

 septa of the branchial channels project beyond it. Hepatic region, 

 the side wall of which commonly forms a distinct facet, generally 

 separated from branchial region by a broad notch in anterolateral 

 margin. Orbits deep, concealing the retracted eye; three sutures in 

 roof and outer wall very distinct; the floor coincides with roof of 

 buccal cavern. Antennae loosely lodged in gap at inner canthus of 

 orbit. Antennules folded obhquely. Buccal cavern elongate; the 



