22 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



As noted by Monod (1939), the individual questionably called 

 Porcellana polita by A. Milne Edwards and Bouvier (1923, p. 293, 

 pi. 1, fig. 7) is more likely Petrolisthes armatus because of the presence 

 in their specimen of an epibranchial spine, which is lacking in Petro- 

 listhes politus. 



Rathbun (1910, p. 600) listed P. politus among species occurring 

 on the Pacific coast, but the only record in the literature which might be 

 construed as Pacific seems to be the general locality "Panama" given by 

 Nobili (1897, p. 4), who had material from the Atlantic side of the 

 isthmus. 



Petrolisthes tortugensis Glassell 



Petrolisthes tortugensis Glassell, 1945, p. 228, text-fig. 2 (type locality, 

 in and around Tortugas, Florida). 



Previous records. — 

 Florida, in and around Tortugas: W. L. Schmitt (Glassell). 



Material examined. — 

 A44-39. 4 mi N of Isla La Tortuga, Venezuela; Apr 21, 1939; 21- 

 22 fms. 1 c? , 5$. 



Measurements. — Male, ca. 4.5 mm (fragmented); females, 4.4 to 

 6.4 mm. 



Remarks. — Glassell's specimens were collected in Pontes coral from 

 low water to 1 1 fathoms. The Velero III material was taken with dead 

 coral at 21 to 22 fathoms, thus doubling the known depth range of the 

 species. 



The name tortugensis, referring to Tortugas, Florida, remains equal- 

 ly appropriate with the second recovery of the species near Isla La 

 Tortuga, Venezuela. 



Petrolisthes galathinus (Bosc) 



Porcellana galathina Bosc, 1801 (or 1802), p. 233, pi. 6, fig. 2 (type 

 locality unknovv^n); 1830, p. 299, pi. 6, fig. 2. Latreille, 1802 

 (or 1803), p. 76; 1819, p. 5, pi. MIO, fig. 4. Desmarest, 1825, 

 p. 199. Gray, 1831, p. 14. Milne Edwards, 1837, p. 258, foot- 

 note. White, 1847, p. 62. Gibbes, 1854, p. 7, pi. 1, fig. 1. Guerin, 

 1857a, p. xvi; 1857b, p. xxxix. Not Say, 1818, p. 458. 



Porcellana sexspinosa Gibbes, 1850, p. 190 (type locality. Key West, 

 Florida). 



