Mollusks. 4459 



Additional Localities, fyc. 



Since the first part of this list was printed several specimens 

 of Circe minima, along with one of Astarte triangularis, have been 

 found in shell-sand from Caithness. 



In place of one, as stated (Zool. 4435), Mr. Murray found several 

 specimens of Cenia Cocksii, on Algae, that were gathered between 

 tide-marks, and put into a small vivarium. These rare mollusks were 

 first observed while crawling up the sides of the glass vessel. Mr. 

 Macdonald, to whom they were sent in the first instance, forwarded 

 them to Mr. Hancock, who obligingly named them. 



Mr. Macdonald has lately obtained several specimens of Eolis nana 

 at Burghead, on shells and zoophytes from deep water. 



Tritonia plebeia has also been got by him in great abundance, 

 on Alcyonium digitatum, dredged off Lossiemouth. 



The following table will exhibit a comparison between this district 

 and some others where the molluscous tribes have been examined 

 and the result published. The first column (B.) contains the 

 numbers in the ' History of British Mollusca,' by Messrs. Forbes and 

 Hanley, as given by Mr. Templer (Zool. 399*2). The second column 

 (M.) contains the number of species hitherto discovered in the Firth 

 and Province of Moray. The third column (A.) contains the numbers 

 of those species of Dr. Macgillivray's ' Mollusca of Aberdeenshire, 

 &c.', that remain after the doubtful and spurious species, so called by 

 Messrs. Forbes and Hanley, have been excluded. The fourth column 

 (N.) is made up from Mr. Alder's i Catalogue of the Northumberland 

 and Durham Mollusca.' And the last column (D.) from Mr. Walpole's 

 papers on the Dublin Mollusca (Zool. 4022 and 4101). 



B. M. A. N. D. 



I. Acephala tunicata 75 6 4 30 



II. Acephala lamellibranchiata. ... 181 97 88 108 101 



III. Acephala palliobranchiata (Brachipoda) 5 1 1 



IV. Pteropoda 4 1 



V. Gasteropoda prosobranchiata. . . 221 89 72 110 70 



VI. Gasteropoda opisthobranchiata. . . 113 43 18 59 8 



VII. Pulmonifera 101 46 44* 80 50 



VIII. Cephalopoda 14 5 4 6 



Sum of species. ..71 4 288 230 394 229 



* Including 1 Carychiura minimum (see Mr. Taylor's list, Zool. 3880), and also 

 " var. B." of Plauorbis voriex, viz., spirorbis, as a distinct species. 



