Clare Island Survey — Marine Mollusca. 



22 5 



The number of species recorded in the following list as the fruit of the 

 dredgings and shore-collections made in 1909 and 1910 is 243. Adding to 

 this three species previously recorded, but not taken during the survey opera- 

 tions, Medone cirrhosa, Bulla hydatis, and JDofo fragilis, the total of known 

 species for the district is increased to 246. No shallow-water area of the Irish 

 west coast hitherto explored has yielded so rich a molluscan fauna as this. 

 The closest approach to it is to be found in the List of the Molluscs of Ballina- 

 kill and Bonn Harbours, the joint work of Mr. G. P. Farran (Nudibranchs) and 

 Mr. E. B. Sykes (Testaceous Mollusca), where a total of 191 species is recorded 

 (" Beports of Sea and Island Fisheries of Ireland," published 1903 and 1905). 

 It should be noted that the smaller forms were not specially sought for in 

 collecting the material from which the second part of this list was drawn up. 

 Next in importance to this Co. Galway list comes Miss Amy Warren's for 

 Killala Bay, with a total of 186 species, the fruit of shore-collecting alone 

 extending over a period of several years (" Journ. of Conchology," 1892). Of 

 the 243 species included in the present list as the result of the survey operations, 

 two, Thccacera pennigera and Actaeonia Cocksii, are for the first time recorded 

 as Irish. The first is an addition to the Irish marine fauna, the second may 

 prove to be only the substitution of one species for another of the same genus. 

 Five species, Tonicella rubra, Circulus striatums, Odostomia conspicua, Pyrgvlina 

 scalaris, and Mytilus phaseolinus, are additions to Marine Province V. of 

 Mr. A. B. Nichols' " List of the Marine Mollusca of Ireland," the province 

 stretching from Loop Head northward to Erris Head, and a sixth species, 

 GjjlichniMi nitidula, is an addition to the shallow-water area of the same 

 province. The occurrence of the elegant little Circulus striatus (Trochus 

 Duminyi) in two dredgings in the bay makes a welcome addition to the 

 existing small tale of Irish records for this rare species. 



Amongst the species taken in the Clew Bay area which, though not new to 

 Marine Province V., are yet generaBy rare in Irish waters, the following are 

 worthy of mention : — 



Scalaria Trevelyana 

 Alvania carinata 

 Manzonia zetlandica 

 Ceratia proxima 

 Baiieeia rubra 

 Jeffreysia diaphana 

 Marginella laevis 

 Jordaniella nivosa 

 Eulima bilineata 

 Odostomia conoidea 



Odostomia diaphana 

 Liostoma clavula 

 Eulimella nitidissima 

 Mangilia striolata 

 M. attenuata 

 Tornatina mammillata 

 Volvulella acuminata 

 Bulla Utriculus 

 Philine scabra 

 Jorunna Johnstoni 



Cadlina obvelata 

 Bostanga coccinea 

 Triopa claviger 

 Aeolis glauea 

 Modiolus adriaticus 

 Lima Loscombi 

 Lepton nitidum 

 L. squamosum 

 Tellina pusilla 

 Saxicavella plicata 



