6 



NATURAL HISTORY BULLETIN 



Cirri XX or more, 15-20 Crinometra ornata 



Arms 10; cirrus joints very slender, many of the 

 proximal 2-3 times as long as broad; cirri XXX or 

 or more, 18-20 Cocometra hagenii 



Stalk present 



Cirri present on stalk 



Intemodes of stalk coimnonly with 6-9 segments 



Endoxocrinus parrae 



Internodes of stalk commonly with 15-18 segments 



Isocrinus asteria 



Internodes of stalk commonly with 11-14 segiments 



Isocrinus decorus 



Cirri wanting Democrinus raivsonii 



Neocomatella alata 



Antedon alata Pourtales, 1878, Bull, M. C. Z., 5, p. 215. 

 Neocomatella alata A. H. Clark 1909. Prof. Biol. Soc. Washington, 22, 

 p. 177. 



Actinometra echinoptera var. alata Hartlaub, 1012. Mem. M. C. Z., 27, p. 

 444; pi. XVIII, figs. 15 and 16. 



This species is represented in the collection by only two 

 specimens. One of these has 15 arms about 50 mm. long. The 

 other has only 13 arms, and all the cirri are lacking. Both are 

 from St. 10 or its vicinity. Station 10. Cuba: off Havana, 200 

 fms. 



Nemaster insolitus 



A. H. Clark, 1917. Proc. Biol. Soc. Washington, 30, p. 65. 



A single specimen of Nemaster answers so well to Clark's 

 description, that I have no doubt it represents this species. It 

 is in only fair condition, hoAvever, and unfortunately has no 

 locality label. The centrodorsal is 4 mm. across, flat and dis- 

 coidal. There seem to have been 21 cirri but only 9 remahi. 

 These and the centrodorsal are w^hite, w^hile the arms, of w^hich 

 there were 18 (8 are broken off), are light brown, with the 

 center of the serrate, distal margin of each brachial, darker 

 bro^Ti; the pinnules are lighter. 



