Zoology. 1 89 



M Pecten clavatus {Fo/i) var. septemradiatus. 



N Montacuta donacina S. V. Wood. 



N Lepton obliquatum Monierosato. 



N Galeomnia Turtoni Soiverby. 



M Barnea (Fholas) parva {Pen/iant). 



u Zirfaia (Pholas) crispata L. 

 N M Pholadidea loscombiana Goodall (P. papyracea). 

 The group of MoUusca which is least known in our district^ 

 and which most requires working at, is the Nudibranchs. 

 Out of 56 species recorded as Irish (a number far from 

 complete), only 15 have been detected in our area. The 

 fact that one or two of these are extremely rare suggests that 

 a rich harvest may await the investigator. 



References. — Nichols: A List of the Marine Mollusca of Ireland, 

 1900 [Proc. R. I. Academy (3) v, No. 4). Chaster : A Day's Dredging off 

 Ballycastle, Co. Antrim, 1897 [Irish Nat., vi, 120). Ibid.: Notes on the- 

 Marine Mollusca of Rathlin Island, 1897 [t. c. 184). Praeger : The 

 Marine Shells of the North of Ireland, 1889 [Proc. B.N.F.C, 1887-8, 

 appendix). Hyndman : Reports of the Belfast Dredging Committee,. 

 1857-9 [British Assoc. Reborts, 1857-9). Thompson : Natural History of 

 Ireland, iv, 1856. 



R. Ll. p. 



Land and Freshwater Mollusca. 



Antrim and Down, with their great diversity of surface 

 features and a very varied coast-line, provide numerous 

 "sanctuaries" for the Terrestrial Mollusca, which are 

 only too few in many counties more generally cultivated, 

 and less broken up by glens and valleys. Fairly large 

 areas in the Glens of Antrim, which are deep vales cutting 

 into the basaltic plateau or the old schists, are much toa 

 rough and steep for cultivation. Many are talus slopes from 

 the basalt or chalk above, covered with natural thickets of 

 Hazel, Holly, and Mountain Ash, shading a deep mossy 

 sward below. Apart from these there are also many thickly- 

 wooded little ravines, mainly in the larger glens, on the 

 slopes of the Belfast hills, or at the head of the many 

 marine gullies round the coast. These have usually a dense 

 undergrowth of Luzula ma.xima and a rough moss-covered 

 talus of chalk, basalt, or schist debris, moist even in the 

 driest summer weather, ideal habitats for many of the Land 



