140 TEANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



named locality from the ambulacral grooves of Astropecten 

 irregularis cast upon the beach. This worm ranges from 

 the Mediterranean to Gal way in Ireland. At Naples, 

 Claparede found it in company with OphiodromiLS flexuo- 

 siis on Astropecten aiwaiitlacits, while A. aurantiacits, 

 hispinosiLS, platy acanthus said pentacanthus from Trieste 

 all iurnished to Marenzeller {loc. clt.) the same two guests. 



Examples of this worm were identified as M. castanea 

 by Mr. Gibson in his " Report on the Vermes " of this 

 district. I note that in the "Challenger" Report the 

 generic name is spelled Acldo?. 



^Halosydiia (Alentia) gelatinosa, (Sars). 



A very large specimen was found under a stone at 

 extreme low water at Puftin Island, October, 1887. It 

 measured 6 J cm. by IG mm. (including the bristles). 



Herniaclion assimile, MTiitosh. 



Hab : 12 (21 fms.) and 11 (10 fms.). 



One small specimen was found crawling among the 

 spines of an Echinus esculent as dredged from 21 fathoms 

 in the Irish Sea, 25 miles N.W. of Liverpool Bar, and 

 Mr. Gibson recorded two from the same host dredged 

 near Port Erin. 



* Hermadion peUucidum,, (Ehlers). 



Hab : (>, 10, 12, 13, (16-22 fms.) 



This species was taken for the first time locally at Sta- 

 tion 12, (^"Spindrift," September, 1890), when three small 

 specimens were dredged. All were commensal with 

 Echinoderms. One was in the ambulacral groove of 

 Astropecten irregularis; another upon Solaster papposa 

 and the third was upon a brittle-star — Ophiotlirix rosula. 

 Marenzeller {loc. cit.) speaks of obtaining a specimen from 

 Opliiotliri.r alopccunis h'om the j^ay of Muggia, near 

 Trieste. 



One of these specimens was perhaps the most l:)eautiful 



