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Proceedings of the Pioyal Physical Society. 



Museum, from the late F. M. Balfour, F.E.S., and in 

 particular from the Eev. Dr J. M'Murtrie, they were able 

 to give a substantial list of 201 species and numerous 

 varieties. For subsequent records we are indebted mainly 

 to Dr Henderson and the Fishery Board naturalists — Dr 

 Scott and Mr Pearcey. Their additions, together with a 

 few others I have met with, are given below. These number 

 42,^ and raise the total of the marine section to 243, a figure 

 which, though small as compared with the Clyde list say, is not 

 likely, I consider, to be augmented by more than 30 to 40 at 

 most. Two of Dr Scott's discoveries, namely, the Pteropods 

 Clione limacina, Phipps {Clio horealis, Brug.), and Limacina 

 retroversa (Flem.), are especially interesticg. The paucity of 

 records of Teredo is perhaps also worthy of remark. Of 

 living Brachiopods there appears to be none in Forth. 



To return to the land and fresh-water section, it has been 

 very thoroughly worked up afresh in connection with Mr 

 W. D. Roebuck's " Census " of the Scottish species, published 

 in the Proceedings of this Society in 1890, and supplemented 

 in the Annals of Scottish Natural History in subsequent 

 years. The " Census," it should be explained, takes cognis- 

 ance only of specimens examined and authenticated by a 

 committee of the Conchological Society, all other records 

 being rigidly excluded. Of the many book-records thus 

 purposely omitted, notice need be taken here only of those 

 relating to Ccecilioides acicula (Mull.) from this district, 

 published in vol. i. of our Proceedings (pp. 346 and 398). 

 My own interest in the non-marine section began many 

 years ago, and, though at its height during the preparation 

 of the Census, still continues. But, as may be seen by 

 reference to that paper (including the supplements) and 

 other channels of publication, I have been by no means the 

 only worker in this field. Mr Roebuck himself visited the 

 district, chiefly in search of slugs, and the following have 

 rendered signal service in forwarding specimens for authenti- 

 cation, namely — Mrs Carphin, Rev. Dr M'Murtrie, Dr Scott, 

 Messrs R. G-odfrey, A. M'Lellan (Stirling district), and G-. 

 M'Dougall (Bridge of Allan district). In order to bring 

 together all this scattered information, I have in preparation 



^ Several, however, are probably not native to the Firth, now at any rate. 



