22 12 Proceedings of the Royal Irish Academy. 



Trachydermon cinereus (Linne). {Chiton marginatus.) W. E. Occasional 



under stones on the E. and S. shores of the island, also at Old Head, 



Dorinish, and Blind Sound. 

 Callochiton laevis (Montagu). {Chiton.) E. Bare: One specimen under 



a stone at low tide, outer shore of Dorinish, '10. Clew Bay (Thompson 



MS.), Nichols, 1900. 

 Tonicella rubra (Linne). {Chiton.) W. M. E. Bare. Valves in 5 f. off the 



Castle, Clare Is., '09 ; one living specimen in about 6 f. in the bay, '09, 



and another at low water, Dorinish, '10. 



Class GASTEROPODA. 

 Order PBOSOBBANCHIATA. 



Acmaea virginea (Miiller). {Tectum.) W. M. E. Common. Living on 

 stones at low water, Clare Island, and on the eastern shores of the bay, 

 at Annagh Is., Dorinish, &c. Dead shells common in 18 dredgings, 

 4-19 f., as many as 95 having been taken in one haul off Mulrauny. 



Patella vulgata Linne. W. E. Common in all suitable stations on the 

 shores of the island and the bay. 



Var. depressa Pennant. Frequent in rock-pools, Clare Island. 



Helcion pelluciduni (Linne). "W. M. E. Occasional, living, between tide- 

 marks on the island and on the eastern bay shores ; shells frequent in 

 dredgings 5-18 f., living in 10 f. and in 18 f. 



Var, laevis Pennant. Common and of large size on Laminaria roots. 

 Specimens 29 mm. x 22 mm. were frequently seen round the kelp ovens 

 on the southern shores of the island. 



Fissurella graeca (Linne). W. M. E. Frequent, living, between tide-marks 

 on the eastern shores at Dorinish, Inishimmel, and Annagh Is. A 

 specimen from the last station measured 28-5 mm. x 19 mm. Iu 6 

 dredgings off the island and in the bay, 4-19 f. ; living in 6 f. 



Emargimila fissura (Linne). W. M. Frequent ; in 4 dredgings 5-19 f. ; 

 1 to 18 shells in a haul ; living at 6 f. 



Cyclostrema serpuloides (Montagu). M. E. Not infrequent. Dredged 

 5 times, 2-19 f. 



C. nitens (Pbilippi). "W. M. E. Bare? Taken in 4 dredgings, 4-19 f., 

 a total of 12 specimens. Living in 4 f. off Inishlyre. 



Trochocochlea lineata ^Da Costa). {Trochus.) E. Abundant and well-grown 

 near high-water mark on the shores of the outer islands and promon- 

 tories of the east coast, as at Bartra, Scotch Bonnet, and Dorinish, 

 also at the S. E. extremity of Curraun Achill. Specimens taken at 



