5706 Mollusks. 



ralist, whose name will be familiar to all, the Rev. David Lands- 

 borough, D.D. : he was the author of ' The Excursions to Arran, 

 Ailsa Crag and the two Cumbraes, with reference to the Natural 

 History of these Islands.' This work, which was published by 

 Johnstone and Hunter, of Edinburgh, gives us an insight into Dr. 

 Landsborough's Natural-History trips over just that district which T 

 have already described, and from his researches these papers will 

 derive much of their value. I had looked forward to forming the 

 acquaintance of a naturalist, who had taste so congenial to my own, 

 and who was so conversant with almost all branches of Natural His- 

 tory, but this was not to be ! Soon after I went to Scotland, the 

 ravages of cholera carried off one who was even more regretted as a 

 man than he was as a naturalist. 



Major Martin, who resides at Ardrossan, has for many years devoted 

 much time to the study of the Marine Zoology of that neighbourhood, 

 but I believe that he has attended more to some other branches of 

 Natural History than he has to the Mollusca. There are many other 

 familiar names which will here and there occur in these notes as 

 contributors to the zoology of the Clyde, but 1 have now mentioned 

 the only naturalists who have done more than paid a passing visit to 

 its waters. 



The arrangement and nomenclature used is that of Forbes and 

 Hanley's ' British Mollusca. 1 Where the first name is succeeded by 

 others between brackets, such names are the synonyms by which the 

 mollusk is designated in Mr. Smith's catalogue and Dr. Lands- 

 borough's work. If a name between brackets has an asterisk attached, 

 it is one that occurs in Mr. Smith's 'Catalogue of the Shells from the 

 Newer Pliocene Deposits of the British Islands,' and is not used in 

 reference to a recent shell by either of the writers referred to. Any 

 deviations from the nomenclature of Forbes and Hanley will be 

 noticed when they occur. 



Class I. ACEPHALA. 

 Div. I. Tunicata. 

 This branch of the Mollusca has hitherto been greatly neglected. 

 It presents an obstacle which unfortunately stands in the way also of 

 many other branches of Natural History, namely, the impossibility of 

 preserving its members without their suffering a total loss of beauty ; 

 added to this, the want of a good book upon the subject is greatly 

 felt by those who would be willing otherwise to embrace it in 



