86 ECHINASfERIDAE. 



Oreasteridae. 



Nidorellia axmata. 



Pentaceros (Nidorellia) armalus Gkat, 1840. Ann. Mag. Nat. Hist., 6, p. 277. 

 Nidorellia arrnata Verrill, 1867. Trans. Conn. Acad., 1, p. 280. 



A single specimen with R = 85 mm. was brought back from Chatham 

 Island, Galapagos. 



LiNCKIIDAE. 

 Linckia guildingii. 

 Gray, 1840. Ann. Mag. Nat. Hist., 6, p. 285. 



A small "comet-form" Linckia, with the main arm 25 mm. long, and the 

 four small arms 8-10 mm., taken at Papeete, Tahiti, seems to be the young of 

 this species. 



Pharia pyramidata. 



Ophidiaster (Pharia) pyramidahis Gray, 1840. Ann. Mag. Nat. Hist., 6, p. 284. 

 Pharia pyramidata Sladen, 1889. Challenger Ast., p. 784. 



There are three specimens of this common Panamic species from Perico 

 Island, Panama. They are remarkable for the short, stumpy appearance of 

 the arms, which are only about four times as long as thick. R = 90-95 mm.; 

 br. = 23 mm. Closer examination shows that not a single arm has a normal 

 tip but in every case the distal part is missing. Although the injury has healed 

 in each case there is no true regeneration started on any arm. It would be 

 interesting to know whether some fish is a persistent browser on this sea-star at 

 Perico Island. 



ECHINASTERIDAE. 

 Henricia gracilis. 



Cribrella gracilis Ludwig, 1905. Mem. M. C. Z., 32, p. 204. 



Henricia gracilis Fisher, 1911. Bull. 76 U. S. N. M., p. 270. 



Two very small Henricias (R = 10 mm.) are as near to this species as to 

 any and are best regarded as young specimens thereof, particularly since one 

 of the original examples of gracilis was taken near the Galapagos Islands in 

 384 fms. 



Station 4642. Galapagos Islands: Hood Island, 4 miles southeast of Ripple Point, 300 fms. Bott. 

 temp. 48.6°. Brk. sh., glob. 



