74 BIBLIOGRAPHY OF 1 879. 



HELIX ASPERSA monst. SINISTROSA AT REDCAR. 



By W. C. hey, M.A. 



Under a broken crock, lying on a sand hill at Redcar, I 

 discovered (among some twenty dextral specimens,) a single 

 sinistral example of Helix aspersa. It is a well-formed shell, 

 almost adult, and I am still keeping it alive. 



March, 1880. 



BIBLIOGRAPHY. 



1879. 



Testacella Maugei in Jersey. — Correction of name — not 

 T. haliotoidea as in Sci. Gossip for July 1879. M. M. 

 Bull, Sci. Gossip, April 1879, p. 90. 



The Mollusca of the Firth of Clyde ; being a Catalogue 

 of Recent Marine Species found in that Estuary. 



By Alfred Brown. (Glasgow : Hugh Hopkins, 1878.) 



Although the recent mollusca of this district have during the 

 last few years received a good deal of attention, especially from 

 the labours of M'Andrew, Barlee, and Merle Norman, still the 

 various memoirs detailing the results of these labours were only to 

 be found widely scattered through a number of scientific periodi- 

 cals, and Mr. Brown has in this neatly printed work given us not 

 only a resume of the labours of the naturalists we have referred to, 

 but also of all those who have collected on the Firth of Clyde, 

 and joined these to the labors of Mr. David Robertson and his 

 own. The result is, so far as the testaceous mollusca go, a large 

 and apparently accurate catalogue, which will show not only what 

 has been done but also among the nudibranchs and cuttle-fish 



