NiCHOi-s — A Lini of Irish Echinodenns. 259 



[Cidaris gracilis (Slaclen).] 



. . . iv., . . 



iv. R. I. A.' Exp, 1888, 750 fnis., a single specimen, probably imma- 

 ture (81aden '91) ; perhaps when a mature specimen is found, 

 it will be seen to be only C. purpiirata Wy v. Thomson (Eell 

 '92b). 

 Distrihution. — S. W. Ireland. Deep water. 



Family — EcHiNOTnuiuiD^. 

 [Asthenosoma hystrix (Wyv. Thomson).] 



V. " Porcupine " Exp. 1869, off west coast of Ireland (Thomson '74). 

 vi. R. D, S. Eish. Survey 1891, 45 miles off Elack Rock, Blacksod 

 Bay, 500 fms. (Bell '92, '92b). 

 Distribution. — Hebrides to Portugal and Azores. W. Indies. 



[Phormosoma placenta, Wyv. Thomson.] 



. . . iv., v., vi. 



iv. "ElyingFox" Exp. 1889, 1000 fms., six specimens (Bell '89) : 



R. I. A. Exp. 1888, 750 fms. (Sladen '91). 

 v. "Porcupine" Exp. 1869, off west of Ireland, fragments and 

 spines (Thomson '74) : R. D. S. Eish. Survey 1890, 54 miles 

 off A chill Head, 500 fms. (Bell '92). 

 vi. R. D. S. Fish. Survey 1891, 45 miles off Black Rock, Blacksod 

 Bay, 375-500 fms. (Holt '92). 

 Bistrilution, — Both sides of Atlantic. Deep water. 



[Phormosoma uranus, AVyv. Thomson.] 



. . . iv., . . 



iv. R. I. A. Exp. 1888, 750 fms., a single line example (Sladen 

 '91). 

 Distrihution. — Both sides of Atlantic. Deep water. 



