ECHINODERMATA. 97 



iii most of its characters, especially in the total absence of 

 skin-spicules, and in the form of the tentacular spicula, which 

 are elongated and cribrose. It appears to differ from C.fron- 

 dosa in its very thick test, and especially in appearing to have 

 feet scattered over the body between the regular rows. At 

 the same time it is possible that the firmness may be due to 

 a state of rigid contraction from having been beaten about in 

 a storm when alive ; and with respect to the latter, the pores 



may not mark contracted feet It does not correspond badly 



with the description of C. Drummondi, a species unknown to 

 me." 



Gucumaria ehngata, Diiben & Koren ; Norman, Zetlandic 

 Fauna, Rep. Brit. Assoc. 1868, p. 316. 



= Cucumaria pentactes, Forbes (partim), the centre figure in woodcut 

 p. 213. 



Specimens are occasionally brought from the coralline 

 ground by the fishermen. 



Cucumaria Hyndmanni, Thompson ; Forbes, Brit. Starf. 

 p. 225. 



Not uncommon in the stomachs of haddocks and cod. 



Cucumaria lactea, Forbes & Goodsir ; Forbes, Brit. Starf. 

 p. 231. 



[riate IV. fig. 5, and Tlate IX. fig. 5.] 

 Abundant in the coralline region amongst zoophytes. 

 Young specimens are numerous in June. 



Genus Thtone, Oken. 

 TJiyonefusus, O. F. Miiller; Forbes, Brit. Starf. p. 233. 

 Common in the stomachs of cod and haddock. 



Genus Thyonidium, Dub. & Koren. 

 Thyonidium Dubeni, Norman, op. cit. p. 317. 

 Occasionally in the stomachs of the cod and haddock. Mr. 

 Norman states that he has found it on the coast of Ireland, as 



O 



