CRINOIDEA AND ECHINOIDEA 



21 



Station 5. Cuba : off Havana, 140 fms. 3 specimens. 



Station 27. Florida: off Key West, 50-60 fms. 2 small speci- 

 mens with banded spines. 



Station 39. Florida : off Key West, 20 fms. 2 specimens. 



Station 57. Pourtales Plateau, 24° 18' N. x 81° 18' W., 200- 

 225 fms. 2 small, nearly white specimens. 



Locality unknown. 4 specimens. 



Tretocidaiis bartletti 



DorocidoA-is hartletti A. Agassiz, 1880. Bull. M. C. Z., 8, p. 69. 

 Tretocidaris bartletti Mortensen, 1903. Ingolf Ech. p. 16. 1910, Bull. 

 74 U. S. Nat. Mus., pis. 2 and 3. 



In the "Narrative," this handsome species is referred to as 

 occurring both on the Pentacrinus ground, off Havana (p. 82) 

 and on the Pourtales Plateau (p. 173). It has been, fully de- 

 scribed and beautifully figured by Mortensen {op. cit., 1910). 

 Only two young specimens are in the collection sent to me. 



Station 7. Cuba: off Havana, 140 fms. 2 specimens. 



Histocidaris sharreri 



Porocidaris sharreri A. Agassiz, 1880. Bull. M. 0. Z., 8, p. 71. 1883, 



Blake Ech., pi. III. 

 Histocidaris sharreri Mortensen, 1909. Ech. Deutsch. Sudpolar- Exp., p. 55. 



Plate IV, Fig. 1 



On p. 82 of the ''Narrative," Professor Nutting says, in 

 speaking of the Echini taken on the Pentaerinus ground, off 

 Havanna: "Perhaps the handsomest species was Porocidaris 

 sharreri, one specimen being a truly magnificent one, with 

 spines about seven inches in length, and the peculiar serrated 

 radioles resembling some of the ivory spear-heads used in 

 Africa." On my writing Professor Nutting that two species 

 have been confused under the name Porocidaris sharreri and 

 inquiring about this specimen from the Pentacrinus grounds, 

 he replied : "I am practically certain it is the true P. sharreri. 

 We have the specimen here. It is one of those about which I 

 wrote, saying that there were certain specimens in our exhibit 

 series that it would be inconvenient to send and that I would 

 have them photographed. This I have done and a very good 



