INSECTS AND OTHER TERRESTRIAL INVERTEBRATES 265 



MOLLUSCA. 



Hyalinia alliaria, Miller In October 191 1, and again in the 

 spring of 1913, I collected both the type and the variety viridula 

 of this small snail on the Bass. In Roebuck's " Census " of Scottish 

 Land and Fresh-water Mollusca, published in 1891, "Bass Rock 

 (J. M'Murtrie) " occurs among the records given for this species. 



Pyramidula rotundata, Mull. Roebuck in his " Census " records 

 var. alba from the Bass Rock (J. M'Murtrie). 



Helix aspersa, Mull. Common about the ruins and the site of 

 the old garden where I have found it on a number of occasions 

 ranging from May 1883 to March 191 3. In his Rapacious 

 Birds, published in 1836, p. 171, MacGillivray mentions that the 

 ruins on the Bass harbour great numbers of this large snail. 



Helix nemoralis, L. A normally banded one found in August 

 1909 is the only example I have met with on the Bass. 



Pupa cylindracea, Da Costa Common under stones on the 

 slope below the old fortifications, October 1911, and March 19 13. 



Clausilia bidentata, Strom. Fully a dozen specimens were 

 found in the same situation as the last in March 1913. 



OLIGOCH^TA. 



The only Earth-worms identified belong to the two following 

 species : 



Lumbricus rubellus, Hoffm. Several in the old garden above the 

 chapel ruins, March 19 13. 



Bimastus eiseni, Lev. One along with the preceding (see Scot. 

 Nat., 1913, p. 237). 



RHIZOPODA. 



In October 191 1 I collected some moss on the Bass and sent it 

 to Mr J. M. Brown, B.Sc, Sheffield, for examination for Rhizopods. 

 As recorded in one of his papers on Scottish Rhizopoda (Scot. Nat., 

 191 2, p. 108), he found the following thirteen species in the material, 

 namely : -Amoeba verrucosa, Corycia radiata, Arcella arenaria, 

 Difflugia globulus, D. constricta, Nebela lageniformis, Euglypha 

 compressa, Assulina ?nuscorum, Sphenoderia dentata, Tritiema 

 enchelys, T. li/ieare, Corythion dulnum, and C. pulchellum. In that 

 paper Corycia radiata was described for the first time. 



