THE CONCHOLOGIST. 



NOTES AND QUERIES. 



Molluscan Parasites. — Very little, I 

 believe, has been written on the subject of 

 Molluscan Parasites, and yet the subject is 

 one of great interest. I write these few 

 notes hoping that some conchologists may 

 be able to add to our present knowledge. 

 The PhilodroDius h'/iiacu/n of Jenyns is well 

 known to all conchologists, but there is a 

 species I have often found on Helix 

 arbustorum which seems to differ from this 

 On a number of the Livinxidc^ I have 

 often noticed a worm-like parasite ; some 

 Mr. W. E. Collinge sent me appear to 

 differ from those I have generally found ; 

 careful examination may prove them to be 

 another species. Mr. Collinge also sent 

 me a number of parasites found on Arion 

 ater, which were certainly not Philo- 

 droimis lima cum. They unfortunately came 

 to grief in course of transit, but he hopes 

 to be able to obtain more, which will be 

 duly described in the pages of " The 

 Conchologist." — J. Galton. 



Literature on the Sphaeriidae.—Will 



any of your readers kindly give me a list 

 of the principal writings on the life-history, 

 anatomy, and variation of this family ? — 

 Thos. R. Walker. 



Illustrations of Varieties.— Can any of 



your readers inform me where I can find 

 illustrations of the following varieties : — 

 Limrura paliistris \'ar. ti/icta, Jeff, Z. 

 truiicatula var. ventricosa^ Moq., and Helix 

 arbiistornm var. conoidea, Westrl. — J. E. 

 Maud, 



ANSWERS TO CORRESPONDENTS. 



All com niitjiiiat ions i)ite)ided for fiibUcation must he 

 authenticated ivit/i natnc and address of sender. 



J. W. — We thank you for your letter and good 

 wishes. We may treat of the subject you name 

 in future numbers. 



J. F. B. — The shigs received are all Arion ater, with 

 a number of the variety rufa. \Ye ihank you for 

 the same. 



C. M. N. — We should recommend glass-top boxes 

 for the type collection, and glass tubes for the 

 remainder. 



L. B. T. — The list you require was published in the 

 "Zoologist," p. 4022, 1853. 



W. E. M. — You will find the "Science Gossip" the 

 best paper for what you require. It has a very 

 large Colonial and foreign circulation. Nearly all 

 the back numbers can still be had. 



A. T. H. — There are a number of mediums you might 

 make experiments with. Try the following : — 

 (i) Equal parts of glycerine and methylated spirit. 

 (2) Water, 800 parts ; chloride of zinc, 100 parts ; 

 dissolve. 



Rev. T. 

 list. 



-Thank; 



for your promise and interesting 



