Quarterly Journal of ConcJwlogy 

 BIBLIOGRAPHY. 



ORNITHOLOGY & CONCHOLOGY 



OF THE County of DORSET. 



By J. C. Mansel-Pleydell, F.G.S. 



This little work contains 120 pages, half of which are 

 devoted to Conchology. The Introduction occupies 6 pages 

 and describes some of the habits of several of the important 

 genera, and treats of the relationships of our present fauna with 

 those of preceding periods. It also furnishes the proportional 

 number of the representative species found in Dorset of each 

 of the 9 types into which Professor Forbes divided the British 

 Marine Mollusca : — viz. 



I. The Lusitanian type. The Dorset members of the Lusitanian 

 or Mediterranean group which just impinge upon the British are 

 five out of the fourteen cited by Forbes and Hanley. 



II. The South British type, confined within a well-marked 

 range along the southern and south-western coasts of England; 

 eighteen out of twenty-two. 



III. The European type, represented by species that are equally 

 diffused and abundant in most parts of the British seas ; all out 

 of the forty-three. 



IV. The Celtic type, a group especially characteristic of Great 

 Britain, many of its members being of ancient origin and well 

 known in the fossil state ; thirty-nine out of forty-three. 



V. The British, an assemblage of species little known elsewhere 

 or even quite unknown out of the British seas. Of the seven 

 species cited as representatives of the British type, being most 

 abundant in Great Britain, and well known in a few localities 

 elsewhere, Dorsetshire claims five. 



VI. The Atlantic type, comprising Molluscs common on the 

 western coasts of Britain, scarce in the Irish seas, and for the 

 most part absent from the German Ocean ; sixteen out of thirty- 

 one. 



VII. The Oceanic type, represented in Britain by the genus 

 lanthina and possibly Scissurella crispata, has no representative 

 on our coast excepting the Cephalopods, which are ranked in 

 this group. 



VIII. The Boreal type, an assemblage of northern forms, many 

 of which are either absent in the south, or become rarer as we 

 proceed southwards; of the thirty-three cited by Forbes and 

 Hanley, Dorsetshire has four. 



