LIST OF THE IRISH TESTACEA. 531 



I have no opportunity of referring to the figures 

 pointed out by the above authors in their sy- 

 nonyms j but the shell before me is very dif- 

 ferent from the H. putris, although at first 

 sight it may be mistaken for it. It differs 

 from that shell in being more oblong, the 

 aperture narrower, the spire longer, and more 

 tapering and acute, the volutions more promi- 

 * nent and rounded, and very deeply divided 



by the separating line, and in having one 

 whorl more more than the H. putris. Co-^ 

 lour of a reddish-brown. I found them plen- 

 tiful in a ditch on the Bog of Allen, near CI9- 

 nooney Barracks. 



40. tentacu- Donovan, Br. Sh. t. 93. — Montagu, Test. Br. 



lata. p. 389* In a stream at Clonooney ; in ditches 



at Na£is ; and in the Canal plentiful. 



41. canahs. Montagu, Test. Br. p. 309. 1. 12. f. 11. In sand 



from Portmarnock. 



42. auricula- Donovan,, Brit. Sh. t. 51. f. 1. — Montagu, Test. 



ria. Br. p. 275. t. I6. f. 2. and p. 381. t. I6. f. 1. 



H. limosa. In a ditch at Clonooney ; and in 

 the pond of the Botanic Garden, Dublin. 



43. laevigata. Montagu, Test. Br. p. 382.— Donovan, Br. Sh. 



t. 105. Plentiful at high-water mark, Port- 

 marnock. 



NERITA. 



1. Canrena. Donovan, Br. Sh. t. I67. N. intricata. — Mon- 



tagu, Test. Br. Supp. p. 148. Portmarnock, 

 one specimen. 



2. glaucina. Donovan, Br. Sh. t. 20. f. 1. — Montagu, Test. 



Br. p. 469. Dublin Bay, Portmarnock, and 

 Portrush, plentiful. I found one specimen in 

 Dublin Bay, measuring 1| inch from the 



