2 26 PEACH : ON CAITHNESS MOLLUSCA. 



Journal here, have entered on the pursuit successfully ; and, 

 although at present they have added no new species, they have 

 greatly assisted in extending localities, and from their quick 

 observation I have great hopes. At present, until more facts 

 have been collected, it is not desirable to enter on a comparison 

 of this district with others, nor anything else beyond giving the 

 numbers stated in three local lists which I have. First, Mr. 

 Alder's ' Catalogue of Northumberland and Durham' ; that of 

 Aberdeen, by the late Professor Macgillivray, in the work on 

 ' Dee Side' ; and that of the ' Province of Moray,' by the Rev. 

 Dr. Gordon, published in the ' Zoologist' 



Northumberland and Durham ... ... 80 species. 



Aberdeen ... ... ... ... 53 „ 



Province of Moray ... ... .'..46 ,, 



Caithness ... ... ... ... 30 ,, 



I would here remark that when the well-known fact of the 

 diminution [in number] of the Pulmonifera as we proceed north 

 is taken into consideration, with the little examination made, and 

 the small area included in the list — viz., Caithness only — there is 

 little cause for either surprise or dissatisfaction, and it only 

 requires more eyes and willing hands of the lovers of Carnabia 

 to be set in motion to increase the number for a supplementary 

 list. When this is the case I hope to return, to the subject, for 

 the present be pleased to accept of this as an instalment only. 



LIST 



Arranged and named agreeably to the 'British Conchology' 



of J. G. Jeffreys, Esq., Vol. I., 1862 :— 



Sphaerium corneum. — Brickigo, River of Wick, &c. 



Pisidium nitidum. — River of Wick, and Loch of Sarclet. 



Unio margaritifera. — River of Wick, rather plentiful. 



*Valvata piscinalis. — Loch of Brickigo, and River of Wick. 



*Planorbis nautileus.— Reiss, and near the Mill of 



Thrumster. 

 *P. albus. — Very rare, Loch of Brickigo. 



J.C, iv., Oct., 1884. 



