12 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



Pachycheles riisei (Stimpson), n. comb. 



Pisosoma riisei Stimpson, 1858, p. 228 (nomen nudum) ; 1859, p. 75 

 (type locality, St. Thomas). Rathbun, 1900, p. 146. Schmitt, 

 1924b, p. 89; 1935, p. 188, text-fig. 48. 

 Pisosoma glabra Kingsley, 1880, p. 406, pi. 14, fig. 2 (type locality, Key 



West, Florida). Benedict, 1901, p. 135, pi. 3, fig. 5. 

 Pisisoma riisei Ortmann, 1897, p. 295. 

 Pisisoma glabra Ortmann, 1897, p. 295. 

 Pisosoma riiseif Nobili, 1898, p. 2. 

 Pisosoma reisei Young, 1900, p. 395. 

 Pisosoma risei Moreira, 1920, pp. 128, 132. 



Previous records. — 

 Florida, Key West: H. E. Webster (Kingsley). Puerto Rico: Fish 

 Hawk (Benedict). St. Thomas: A. H. Riise (Stimpson, 1859); P. 

 Duchassaing de Fonbressin (Nobili). Barbados: Univ. Iowa Barbados- 

 Antigua Exped. (Schmitt, 1924b). Brazil, Maceio, Alagoas: A. W. 

 Greeley (Rathbun) ; Ilha Trindade: 5^rrojo (Moreira). 



Material examined. — None from the Hancock collections. 



Remarks. — In the opinion of the writer, who examined specimens 

 loaned by the U. S. National Museum, this species belongs in the genus 

 Pachycheles rather than in Pisosoma where it has always been placed. 

 The side walls of the carapace are subdivided, as in all members of the 

 genus Pachycheles. It is very close to Pachycheles biocellatus (Locking- 

 ton) of the west coast. 



This crab occurs in the littoral, and has been taken from coral heads. 



Pachycheles rugimanus A. Milne Edwards 



Pachycheles rugimanus A. Milne Edwards, 1880, p. 36 (type localities, 

 Contoy and W of Florida). Benedict, 1901, p. 136, pi. 3, fig. 

 9. Hay and Shore, 1918, p. 404, pi. 29, fig. 2. A. Milne Edwards 

 and Bouvier, 1923, p. 296, pl. 4, fig. 3. Schmitt, 1935, p. 184, 

 text-fig. 46. 

 Previous records. — 

 North Carolina, of? Beaufort, 14 fms, and of? Cape Lookout, 47 fms: 

 Fish Hawk (Hay and Shore). Florida, 13 fms: Bache (A. Milne 

 Edwards). Mexico, Contoy, 12-18 fms: W. Stimpson (A. Milne 

 Edwards). St. Thomas: (Schmitt). 



Material examined. — None from the Hancock collections. 

 Remarks. — To a depth of 79 fathoms (Schmitt). 



