Quarterly Journal of Conchology. 51 



one was sent to me, an empty, dead shell, but quite in fresh eonflition' 

 found in an hedge near Uppingham, Rutland. Here we have five 

 examples of a rather abnormal form, all oocurriiag in the same year 

 and in different localities. Many people would no doubt say they 

 were found, owing to extra diligence in search ; nor did it occur to 

 me to look for any other cause, until this summer my attention was 

 attracted to an analogous case in the vegetable kingdom. In the succu- 

 lent house, at Kew, I noticed a form of Haworthia tepulata, 

 marked as var. asperica. It was a solitary specimen. In the 

 course of a few days I met with a single specimen in two private 

 gardens ; here I was able to trace with some degree of certainty 

 whence they came. I entertain no doubt that they were portions of 

 a batch of seedlings raised in one of the most eminent private 

 gardens in the country. I returned to my own garden much dis- 

 satisfied that I was unable to procure a specimen, when, upon 

 examining a lot of seedlings raised from seed of my own savino-, I 

 discovered what I considered an identical plant. Kow, what I wish 

 to call the attention of your readers to is the fact of the simultaneous 

 appearance of these forms in diflferent localities, and to ask if any of 

 them can give a satisfactory theory for these occurrences. No doubt 

 many of your correspondents are interested in other branches of 

 Natural History, and have noticed similar cases, and well considered 

 the subject. The only idea I can form is, that it must be due to 

 atmospherical or electrical effects. — John E. Daniel 6 The Terrace 

 Epsom, December 28th, 1874. ' ' 



Limnsea gliitinosa Mailer. — At Sandwich, during last autumn, I 

 found this species in a ditch near Sandwich in tolerable plenty. The 

 peculiarity about it was, that it was rather smaller in size and of a 

 darker colour than usual. Several of my conchological friends have 

 told me that their experience has been that they float at or very near 

 the surface of the water. In this instance the water was of con- 

 siderable depth, and they were at the bottom, I suppose crawling on 

 the mud, so that it entailed the necessity of a species of dredging to 

 procure them. Perhaps if this shows their usual habits, it may 

 account for the rarity of their occurrence. — [Mrs.] J. Fitzgerald 

 Folkestone, December L5th, 1874. ' 



NOTES OS THE GENUS CYLINDllELLA (Pfeifper.) 

 By C. p. GLOYNE. 



The generic division now known under this name was originally 

 founded in 1828 by the Eev^. L. Uuilding (a naturalist of great 

 attainments, and to whom we owe some of the first light thrown on 

 the hitherto neglected subject of West Indian Conchology) under the 

 name of Bmchypus. Guilding seems, however, to have been un- 

 fortunate in the choice of names, as both Brachypus and Siphonos- 

 toma, to which he changed the name in 1840, had been previously 

 used in zoology, and Pfeiffer's name, Cylindrella, also dating from 

 1840, must thei'efore be employed. 



