BOOG WATSON: CIRCE VersuS GOULDIA. 299 



winter, I found one Vertigo angustior-. V. edentula, E. and W. 

 Sutherland, and one near Ben Armine near the watershed. I 

 have some beautiful varieties of II. neinoralis and arbustorum. 

 Pisidium pusillum extends round the whole county east and west, 

 and also most of Caithness; I think I have two other species of 

 Pisidia. Unio margaritifer, Naver River in the west and Brora and 

 Helmsdale Rivers in the east. Valvata piscinalis, dead shells, 

 Loch Assynt, west. Planorhis nautilejis, I found three living 

 specimens about one mile south-west of Mound Station in a deep 

 drain inclined to brackish water. P. contorhts seems common in 

 the lochs and rivers, often washed down to the sea-side, where I 

 find them dead pretty often. lijnncEa pereg7-a, I. tjiincatula 

 and Ancylus fiuviatilis extend over nearly all parts of Sutherland 

 and Caithness. I found this summer (1882) another limncea near 

 Dornoch Firth, either half grown palustris or glabra. 



CIRCE versus G QUID I A. 



By the Rev. R. BOOG WATSON, B.A., F.R.S.E., F.L.S., &c. 



The genus Gouldia of C. B. Adams, had fallen into disfavour, 

 till in the Proceedings of the Zoological Society for 1879, p. 131, 

 Mr. W. H. Dall of the Smithsonian Institution, Washington, 

 whom all his friends respect no less for his patriotism than for his 

 conchology, claimed for it a new generic recognition. Mr. Edgar 

 A. Smith in a very interesting paper published in the P. Z. S., 

 1 88 1, p. 489, set aside these claims and maintained the Circe of 

 Schumacher as the most satisfactory title. Mr. Dall in the Bul- 

 letin of the Museum of Comparative Zoology, Nov. 28, 1881, de- 

 clined to accept Mr. Smith's verdict. 



