8(> Mr. A. Alcock on 



Family Porcellanasteridae. 

 PoitCHLLANASTKR, Wyvillc Thomson. 



14. Purcellnnaster cccruleus, Wyville Thomson. 



Porctlhmnster cfrrulem, Wyville Thomson, Vov. Chall. Atlantic, vol. i. 

 p. 378, %s. or and 08; SludtMi, ' Challeujjer ' Astm-oMea, p. 134, 

 pi. XX.; and in "NVood-AIason and Ali'()ck, " Inliaii l)t'e|)-sea 

 J)reilgin{r," Ann. Sc M.xg. Nat. Hist., Dec. 1891, pp. 433 and 434. 



Andaman Sea, 683 fathoms, blue mud ; Laccadive Sea, 

 73S fathoms, c^roon mud ; and Bay of Bengal, 1064 to 1748 

 fathom.s, Glohigerina- ooze. 



Styracaster, Sladen. 



15. Styracaster horridus^ Sladen. 



Stifrncaster horrid inf, Sladen, * Challonrrer ' Asteroidea, p. 150, pi. xxiii. 

 figs. .5-7, pi. xxvii. fiirs. 17-20; and in Wood-Mason and Alcock, 

 " Indian Deep-sea Dredging," Ann. & Mag. Nat. Hist., Dec. 18U1, 

 p. 4.i4. 



Bay of Bengal, 1748 and 1803 fathoms, Glohigerina-oozo. 

 and pumice. 



16. Styracaster armatus^ Sladen. 



Styracaster annatm, Sladen, ' Challenger ' Asteroidea, p. 153, pi. xxiv. 

 tigs. 1-4, pi. xxviii. figs. 1-4. 



Bay of Bengal, 1840 and 1924 fathoms, Globi'gerina-ooze. 



17. Styracaster clavipes, Alcock and Wood- Mason. 

 Styracaster clavipes, Ann. & Mag. Nat. Ilist., Dec. 1891, p. 434. 



Bay of Bengal, 1748 fathoms, Glohigerina-oozo. and 

 pumice. 



Hypiialaster, Sladen. 



18. Ilyi^halaster tara, Alcock and Wood-Mason. 



Ilyphalaster tara, Ann. & Mag. Nat. Hist., Dec. 1891, p. 4.34. 



Bay of Bengal, 1748 and 1997 fathoms, Glohigerina-oozo. 

 and pumice. 



