NO. 8 HAIG : THE ATLANTIC GALATHEIDEA 21 



According to Nobili (1901, p. 12), the specimen earlier identified 

 by him (1897, p. 4) as Petrolisthes marginatus Stimpson was actually 

 an anomalous example of P. armatus with four spines on the carpus of 

 the cheliped instead of three. Among specimens from Florida examined 

 in connection with this report, several had an extra carpal spine, usually 

 on one cheliped only. 



Petrolisthes politus (Gray) 



Porcellana polita Gray, 1831, p. 14 (type locality not designated). 



Griffith, 1833, p. 312. Milne Edwards, 1837, p. 253. White, 



1847, p. 63. Probably not A. Milne Edwards and Bouvier, 1923, 



p. 293, pi. 1, fig. 7. 

 Porcellaria polita Griffith, 1833, pi. 25, fig. 2. 

 Porcellana magnifica Gibbes, 1850, p. 191 (type locality. Vera Cruz, 



Mexico) ; 1854, p. 6, pi. 1, fig. 3. 

 Petrolisthes politus Stimpson, 1858, p. 227; 1859, p. 74. Nobili, 1897, 



p. 4. Schmitt, 1936, p. 374. Monod, 1939, p. 559. Not Stebbing, 



1920, p. 261. 

 Petrolisthes magnifica Benedict, 1893, p. 539. Young, 1900, p. 393. 



Schmitt, 1924a, p. 73 ; 1924b, p. 89. 

 Petrolisthes magnificus Rathbun, 1920, p. 11. 

 Petrolisthes polita Schmitt, 1935, pp. 185, 187. 



Previous records. — 

 Florida Keys: (Rathbun). Mexico, Vera Cruz: (Gibbes, 1850). Puerto 

 Rico, Guanica Harbor: Sci. Surv. Porto Rico and Virgin Ids. (Schmitt, 

 1935). St. Thomas: A. H. Riise (Stimpson, 1859). Antigua: Univ. 

 Iowa Barbados-Antigua Exped. (Schmitt, 1924b). Guadaloupe: R. 

 Lami (Monod). Barbados: T. Gill (Stimpson, 1859); W. H. and 

 A. H. Brown (Benedict); Univ. Iowa Barbados-Antigua Exped. 

 (Schmitt, 1924b). Panama, Colon: E. Festa (Nobili). Curagao: J. 

 Boeke (Rathbun); C. J. van der Horst (Schmitt, 1924a). Bonaire: 

 J. Boeke (Rathbun) ; P. Hummelinck (Schmitt, 1936). 



Material examined. — 

 A46-39. Vista Alegre, Curasao; Apr 23, 1939; shore. 166^, 12? 



(8 ov). 

 A41-39. Buccoo Reef, Tobago Island; Apr 20, 1939; shore. Ic?, 



l$ov. 

 Measurements. — Males, 4.1 to 9.1 mm; non-ovigerous females, 3.9 

 to 8.1 mm ; ovigerous females, 4.9 to 9.3 mm. 



Remarks. — The species occurs in the littoral among rocks; up to a 

 depth of 110 fathoms (Schmitt, 1935). 



