ECHINODERMATA 527 



tinguished from C. subdepressus from Jamaica, by the thicker edge 

 of the test, by the shape of the rosette, and by the shorter, broader 

 and bhniter petals. This sj^ecies occurs along the coast from San 

 Diego to Acapulco. 



Encope micropora Agassiz. 



There are 7 fine, large, dry specimens, dredged on the sand in 

 Tagus Cove in 50 feet of water. They vary considerably in propor- 

 tions, one being 138 x 125 mm. and another 142 x 140 mm., the 

 largest is 152 x 148 mm. The color is light brown, the margin and 

 edges of the lunules dark purple. This species occurs from Guayamas 

 to Panama, and has been previously reported from the Galapagos. 



Rhynchopygus pacificus A. Agassiz. 



The most beautiful object in the collection is a nearly perfect test of 

 this spatangoid, 70 x 58 x 30 mm., bleached perfectly white. There 

 are two other broken tests. This species is known from Panama, 

 Acapulco, and Cape San Lucas, and has been previously reported from 

 the Galapagos. 



The following echinoids have been previously taken at the Gala- 

 pagos : 



Arbacia stellata (Blainville). 



An urchin, ranging from Puget Sound to Peru. 

 Mellita stokesii Agassiz. 



A sand dollar, known from Punta Arenas, Panama and Guayaquil. 



The Albatross took two other species i^Porocidaris cobosi A. Ag. 

 and Salenia miliaris A. Ag.) in deep water in the vicinity of the 

 islands, but they are not littoral forms, and so are not listed here. 



The following species are reported from the Galapagos, but the first is of 

 doubtful standing, and the other two are Western Pacific species, whose occur- 

 rence in the Galapagos is more than doubtful : 



Pleurechinus botkryoides Agassiz. 



Atnblypneustes formosus Valenciennes. 



Strongylocentrotus iuberculatus (Lamarck). 



HOLOTHURIOIDEA. 



Holothuria fusco-rubra Th^el. 



Of this species, previously known only from the Hawaiian Islands, 

 there are two good specimens from a reef near Tagus Cove. They 

 are about 125 mm. long, light reddish-brown, and answer perfectly to 

 Theel's description and figures, except for some minor differences in 

 the supporting plates of the pedicels. 



