74 



On the Echinodermata of St. Andrews. 



Genus Thyone, Oken. 

 Thyone fusus, O. F. Miiller • Forbes, Brit. Starf. p. 233. 

 Common in the stomachs of cod and haddock. 



Genus Thyonidium, Dub. & Koren. 



Thyonidium Dubeni, Norman, op. bit. 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 

 well as in Shetland. He observes {in lit.) that in this form 

 there are no skin-spicula ; feet with a large, circular, cribrose 

 plate at the end, no spicula on sides ; tentacles cased in large 

 cribrose spicula of varied form — elongated, short, or most 

 elegantly irregular and branched. 



Thyonidium commune, Forbes & Goodsir ; Forbes, Brit. 

 Starf. p. 217, and Norman, op. cit. p. 317. 



A fragmentary specimen in the stomach of a cod. 



Fam. Synaptidae. 

 Genus Synapta, Eschsch. 



Synapta inhcerens, O. F. Miiller ; Dr. Herapath, Journ. 

 Micr. Sc. 1865, p. 4. 



The typical form occurs between tide-marks, as well as in 

 the laminarian region, the anchor-plates having six apertures 



surrounding the central, and comparatively few openings in 

 the narrow part to which the anchor is attached (see smaller 



