Boone, Crustacea, Cruises of "Ara" and "Alva" 199 



Exception;ally interesting among the east American deep- 

 water species discussed here is Geryon quinquedens S. I. Smith, 

 dredged in 100 to 200 fathoms, off Fowey Rocks, Florida, of 

 which the first color record is given. This rather rare species is 

 also found in the tropical eastern Atlantic. 



Two species of the Grapsidae, the gaily colored, gnome-like 

 dwellers of the tropicopolitan tidal zone, were obtained by the 

 "Ara" at Jebwar, Jaluit Island, Marshall Islands, — the discoidal, 

 scarlet Grapsus grapsus Linne and the smaller Geograpsu^ lividus 

 (H. Milne Edwards). The seldom captured Sesarma (Sesarma) 

 rotundatum Hess was taken on Kusai Island, Caroline Islands, 

 establishing a new locality for it. 



Here also were taken the rare land crab, Cardisoma hirtipes 

 Dana, a magnificent specimen, with the rich colors of its deep 

 violet-purple body accentuated by the cinnabar red of the gigantic 

 claws and the widely distributed little burrowing crab of the 

 Indo-Pacific tidal zone, Uca annulipes (Latreille), legendary 

 Chinese god of the tides, both of which species are recorded from 

 the Caroline Archipelago for the first time. 



The Macrura include only four species, two of which were 

 obtained by the "Alva" Mediterranean Cruise, — the ancient, 

 primitive Scyllarides aequinoctalis (Lund) previously obtained 

 by the "Ara" in the West Indies, is represented by a large male 

 and female with thousands of eggs, taken at Funchal, Madeira, 

 and the spiny, sculptured Nephrops norvegicus Linne, one of the 

 economically and ecologically important prawns of European 

 seas, is recorded from Almeria, Spain. 



The very rare Penev^ merguiensis de Man, previously re- 

 ported in the "Alva" World Cruise collections from Noumea, New 

 Caledonia, was also taken by the "Ara" in 25 fathoms, in Manila 

 Bay ; the first record of the coloration of this exquisite prawn is 

 given from Mr. Vanderbilt's' field notes. 



Another of the Chilean species established so long ago by the 

 Abbe Don Juan Ignacio Molina (1787) was taken by the "Alva" 

 South American Cruise of 1935 in Callao, Peru, the fascinating 

 little "mason crab" (shrimp), Palaemon caementarius (Molina), 

 the only freshwater species in the present report. 



The Anomura are represented by seven species, five of which 

 are hermit crabs, one, a Galatheid and one, a Porcellanid crab. 

 A magnificent specimen of Petrochirus bahamensis (Herbst), 



