76 



ASTEROIDEA. 



line ; interbrachial angles rounded. The two sets of marginals 

 equal in number — about thirty on either side of each arm, uniformly 

 and rather coarsely granulated. Ambulacra narrow, bounded by 

 a set of seven to ten spines, outside which is a set of less numerous 

 but shorter spines, and beyond these there are scattered spiniform 

 granules. The intermediate plates are covered by stout spiny 

 granules and are of moderate size. The intermediate plates of the 

 dorsal surface tend to be hexagonal in form and are covered with 

 rounded or knob-like granules. The madreporite is distinct but 

 has no special boundary of spines. Pedicellariae are few and small. 

 Colour, in spirit, white ; dried, light brick, darker on disk above 

 and below. 



Breadth of 

 R- r. arm at base. 



110 26 15 



101 26 18 



83 24 14 



71 18 13-5 



Height of 

 ditto. 

 11 (4-armed spec.) 

 9 



7-5 

 7 



Distribution. West Indies; south-west of the Canary Islands; 

 south-west of Ireland. 163-1525 " 



D fms. 



a -e. South-west coast of Ireland, 315 fms. (one 

 four-rayed). 



; Flying Fox ' Exp. 



Incertce sedis. 



3. HIPPASTERIAS. 



Hippasteria, Gray, Ann. $ Mag. vi. (1840) p. 279 ; Pen: Arch. Zool. 



exp. v. (1876) p. 86 ; Viguier, op. cit. vii. (1878) p. 176. 

 Goniaster (pars), Ag. Mem, Soc. Neuchdt. i. (183(3) p. 191 ; Forbes, 



Brit. Star/. (1841) p. 122; Norm. Ann. $ Mag. xv. (I860) p. 123. 

 Astrogomum, M. Tr. Sgst. Ast. (1842) p. 52 (pars). 



Arms extending a little or no distance beyond the disk ; marginals 

 indistinct. Intermediate plates of both surfaces covered with pro- 

 tuberant rounded granules, among which are scattered, more thickly 

 on the ventral surface, large sessile bivalved pedicel] arise. Spines 

 replaced by tubercles, except in the ambulacra! grooves, where the 

 spines are very stout and have broad ends. 



1. Hippasterias phrygiana. 



Asterias equestris (pars), ZAm. Sgst. Nat. xii. (1766), p. 1100; Lamk. 



An. s. Vert. ii. (1816) p. 555. 

 Asterias phrygiana, Parelius, Norsk. Vid. Selsk. Skrifter, iv. 1708, 



p. 425, pi. xiv. figs. 1 & 2 ; Mull. Prod. Zool, Dan. (1776) p. 234, 



no. 2829; L., Gmel. Sgst. Nat. xiii. (1788) p. 3163. 

 tfoniaster phrygianus, Ag. Mem. Soc. Neuchdtel, i. (1836) p. 191; 



Scott, Ann. Scot, Nat. Hist. i. (1892) p. 49. 

 Asterias johnstoni, Grag, Loudon's Mag. Nat. Hist, ix. (1836) p. 146. 

 iHippastenas plana, H. europaea, 11. johnstoni, Gray, Ann. & Mao. 



vi. (1841) p. 279. 



