ECHINODERMATA. 
97 
in 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.” 
Cucumaria elongata , Diiben & Koren; Norman, Zetlandic 
Fauna, Bep. Brit. Assoc. 1868, p. 316. 
— Cucumaria pentactes , Forbes (partim), tbe 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 & Goods ir; Forbes, Brit. Starf. 
p. 231. 
[Plate IV. fig. 5, and Plate IX. fig. 5.] 
Abundant in the coralline region amongst zoophytes. 
Young specimens are numerous in June. 
Genus Tiiyone, Oken. 
Thyonefusus, O. F. Muller; 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 
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