Clare Island Survey — Archiannelida and Poltjchaeta. 47 I 5 



the Polychaete fauna of the east and west coasts of Ireland, for the reason 

 that the east coast fauna has not yet been investigated with anything like 

 the same degree of thoroughness as that of the west coast. 



Two new genera, Praegeria and Thelepides, sixteen new species, and three 

 new varieties are described, viz. : — 



Exogone hebes, var. hibernica var. nov. 

 Sphaerosyllis bulbosa sj). n. 

 Pionosyllis serrata sp. n. 

 Streptosyllis Websteri sp. n. 

 S. bidentata sp. n. 

 Opisthodonta ptercbaeta sp. n. 

 Castalia fusca var. hibernica var. nov. 

 C. fusca var. 



Pholoe tuberculata sp. n. 

 Praegeria remota gen. et sp. nov. 



Mystides (Mesomystides) elongata 



sp. n. 

 Paraonis lyra sp. n. 

 Nerinides tridentata sp. n. 

 Aonides paucibranchiata sp. n. 

 Chaetozone alata sp. n. 

 C. killariensis sp. n. 

 Thelepides collaris gen. et sp. nov. 

 Armandia flagellifera sp. n. 

 Chone filicaudata sp. n. 



The generic name Anaitis has been changed to Paranaitis, and Cirratulus 

 norvegicus Mcintosh, has been changed to C. Macintoshi, nom. nov., the two 

 original names having already been used for other forms. 



The following thirty-six species have not previously been recorded from 

 the British Marine Area : — 



Sphaerosyllis erinaceus. 

 Syllis (Typosyllis) vittata. 

 Syllis (Eblersia) ferrugina. 

 Autolytus brachycephala. 

 Autolytus punctatus. 

 Microphthalnms Sczelkowi. 

 Oxydromus propinquus. 

 Chrysopetalum debile. 

 Lacydonia miranda. 

 Eulalia pusilla. 

 Mystides bideutata. 

 Mystides borealis. 

 Mystides limbata. 

 Marphysa fallax. 

 Spbaerodorum Claparedii. 

 Sphaerodorum minutum. 

 Aricidea Jeffreysii. 



Polydora Giardi. 

 Magelona rosea. 

 Myriochele Heeri. 

 Macrochaeta clavicornis. 

 Cirratulus norvegicus. 

 Cirratulus Macintoshi. 

 Proclea Graffi. 

 Amphitrite affinis. 

 Polycirrus denticulatus. 

 Micromaldane ornithochaeta. 

 Petaloproctus terricola. 

 Asclerocheilus intermedius. 

 Jasmineira caudata. 

 Chone Dunevi. 

 Eucbone rubrocincta. 

 Euchone rosea. 

 Spirorbis pusilloides. 

 Spirorbis medius. 



species are here recorded from 



Irish 



Nerinides longirostris. 



In addition, seventy-seven other 

 waters for the first time. 



The collections described in the present paper, including the types of the 

 new species, have been deposited in the Irish National Museum. 



