86 ECHINASTERIDAE. 
OREASTERIDAE. 
Nidorellia armata. 
Pentaceros (Nidorellia) armatus Gray, 1840. Ann. Mag. Nat. Hist., 6, p. 277. 
Nidorellia armata Verrt1, 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) pyramidatus Gray, 1840. Ann. Mag. Nat. Hist., 6, p. 284. 
Pharia pyramidata SLADEN, 1889. Challenger Ast., p. 784. 
There are three specimens of this common Panamie 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 Lupwia, 1905. Mem. M. C. Z., 32, p. 204. 
Henricia gracilis Fisner, 1911. Bull. 76 U.S. N. M., p. 270. 
Two very small Henricias(R = 10mm.) 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. 
