20 The Irish Natu7'aJist. January, 



Marine Mollusca at Port Stewart. 



In the Transactions of the Natural History Society of Glasgow, vol. vi. (new 

 series), 1899 -1900, pp. T-17, the Kev. G. A. Frank Knight gives a list of 

 marine mollusca obtained by shore collecting by himself and friends at 

 Port Stewart, Co. Derry, and institutes a comparison between the 

 shells of the Antrim and Derry shores and those of the Clyde, 



Of the 112 species and varieties obtained, Mr. Knight finds that four- 

 teen are not found in the Clyde, or have been recorded on unsatisfactory 

 evidence, and that ninety-eight are common to the Irish and Clyde shores 

 The following do not appear to have been previously recorded from the 

 shores of Down or Antrim : — Ostrea edulis, var. parasitica, Turt. : Pecten 

 tigritiiis^ var. costata, Jeff. ; Cardiuni tube rcu latum, Iv- ; Venus gallina, var. gibba, 

 JefF. ; Purpura lapillus, var. imbricata, lymk. ; Pleurotoma IcBvigata, var. minor, 

 Jefif. ; and Bulla hydatis, Iv. 



Additions to the list of Mollusca of Clonbrock. 



In this Journal for September, 1896, Dr. ScharfF gave a list of forty 

 species of mollusca collected mainly in the demesne, and I was able to 

 add seven species to this list in the June number, 1899, As the result of 

 four or five days' collecting with the Hon. R. E. Dillon along the river 

 at the little pond in the woods called the " Bath," and in drains between 

 the deerpark and Kilconnell Abbey, I can add fourteen more species to 

 the Clonbrock list. This includes the very local and rare Amphipeflea 

 from Ivough Callow, which Mr. W. F. de V. Kane obtained in fair numbers 

 by dragging my light dredge through water-plants there, while he was 

 collecting Entomostraca; — Jltrina pellucida, Helix aspersa, very local, but 

 common; Amphipcplta glutinosa^ Planorbis spi7vrbis in rwer-, P. contortus \.\\ 

 "Bath," drains, and lyOugh Callow; P. crista and var. nautileus, in drains 

 and Lough Callow ; Valvata cristata, Sphccrium corneuin, Pisidium amnicum, in 

 the river only; P. pulchellum, P.fontinalc, P. miliuin, P. obtusale, P. pusillum. 

 The Pisidia are plentiful in the district, especially in Lough Callow and 

 the deep drains near the deerpark. Mr. C. Oldham kindly named the 

 specimens of this genus for me. 



In the lot from the Lough there were several extremely ventricose 

 specimens, their breadth being equal to height and length, in that res- 

 pect resembling P. hiberniciim^ but they are not nearly so angular in shape, 

 Mr. Oldham cannot definitely refer them to any of the Irish species, and 

 it is desirable to obtain more material at some future time. 



This brings the total for Clonbrock to sixtj^-one species, most of these 

 collected in the old woods and along the river banks in the demesne — a 

 large number for such a limited area, and all new records for East 

 Galway, which is marked blank in the last Census of the Conchological 

 Societ}'. 



Belfast. 



R. W^r,CH. 



