I9I6. 
Notes. 
83 
Abraxas grossulariata — a new Irish Variety. 
The Magpie Moth {Abraxas gyossulaviata) has become in recent years a 
well-known insect to students of heredity through the researches of Dr. 
Leonard Doncaster on the results of crossing the type form with the pale 
variety, lacticolor, found among wild insects only in the female sex. Dr. 
Doncaster's work has furnished a classical example of sex-limited inheri- 
tance, and throws much light on Mendelian phenomena as applied to the 
determination of sex. An interesting supplement to Dr. Doncaster's re- 
searches has been lately published {Journal of Genetics, March, 1916), by Rev. J. 
M. Woodlock, of Tullamore, who discovered at Milltown, Co. Dublin, a pale 
variety resembling lacticolor, and has carried on breeding experiments be- 
tween this and the typical grossulariata. The new variety behaves as a 
simple recessive to the type, uncomplicated by any sex-linking factor, and 
offering thus a marked contrast to lacticolor. The author concludes that the 
development of the type follows on the presence of two dominant genetic 
factors, one opposed to the factor for lacticolor, the other to that for the new 
variety, which for the present he designates as " Q." 
The Non=Marine Mollusca of the Aran Islands. 
Since igio, when my account of the land and freshwater mollusca of Inish- 
.more was published (/. N., xix., p. 115), the following four species have been 
added to the list. I visited Inishmore again in August, 1915, and took Vallonia 
.costata Miiller in several places, and found Vertigo angustior Jeffreys as a fossil 
in the sandhills at Killeany Bay. In May, 1915, the island was visited by 
Mr. H. C. Huggins, of Gravesend, who found there Succinea Pfeifferi Rossm., 
of which he kindly sent me specimens. Pisidium casertamm Poli is recorded 
for the Aran Islands by Mr. B. B. Woodward in his " Catalogue of British 
Pisidia," 1913, the specimens being in the National Museum, Dublin. 
The record for Hydrohia Jenkinsi must be withdrawn, as on my last visit I 
-could not find that species, and subsequent examination of the shells taken in 
1908 showed that specimens of H. ventrosa encrusted with a black substance 
were mistaken for H. Jenkinsi. Mr. A. W. Stelfox informs me that his speci- 
mens recorded in the Irish Naturalist, 1907, have also proved to be H. ventrosa. 
R, A. Phillips. 
Cork. 
The Record of Paludestrina Jenkinsi Smith for the Aran 
Islands. — A Correction. 
In this Journal (vol. xvi., p. 361) I reported the presence of P. Jenkinsi in a 
brackish lake near Kilronan, on Inishmore, associated with P. ventrosa Mont. 
•Of late years I have been doubtful of the correct identification of the former, 
