248 



Notes on some Indian and Burmese Helieidw. 



[No, 3, 

 Habitat, 



minor invenitur dente marginali carens. Long. 8 mills, 

 Pegu. Var minor prope fontes fluminis, Pegu dicti. 



A single specimen of this shell was received by me from Mr. W. T. 

 Blanford, and I subsequently found two specimens of the smaller variety. 

 It very closely approaches 8. JBlanfordi, Th. and 8. Andamanica, but 

 is not so depressed in form, and it differs from S. Petiti chiefly in its 

 more triangularly quadrate mouth, marginal tooth and smaller size, 

 (my largest, average, and smallest specimens of 8. Petiti measuring 

 in length respectively, 14.11 and 9 mills.). 



The distinction however between these shells is only sufficient to 

 constitute a well marked race. S« Blanfordi, Th. ranging with & 

 Andamanica, and 8. JBirmanica, Bl. with its ally 8. Petiti. 



Clattsilia Mas oni, Th. 



Testa areuato-rimata, fusiformi, tenui, costulate* striata, pallide cas- 

 tanea. Apice intact o. Sutura excavata. Anfractibus decern, sub-pla- 

 natis, ultimo augustiore, supra aperturam fortiter striato, juxtaque 

 suturam fossa, lamina? interioris cursum monstrante, notato. Lunella 

 distineta ; interdum non. Lamellis quinque, duabus parietalibus te- 

 nuibus, distinctis, intus conniventibus ; reliquorum binis/ortibus ad 

 aperturam divergentibus ; tertia post lunellan valde tenui, incon- 

 spicua. Apertura rotundato-auriformi-soluta. Peristomate expanso, 

 reflexiusculo. Longitudinis 21 ad 29 mills. Latitudinis 4 ad 5 mills. 



Habitat prope Tonghoo in montibus inter Provincias Pegu et Mar- 

 taban. 



This species varies somewhat in size and some specimens have 

 a more slender spire than others. I have named it in compliment 

 to the Eev. F. Mason, D,D., who kindly supplied me with speci- 

 mens, and whose success, among the wild Karen tribes, will ever cause 

 his name and that of his talented and energetic wife, to be enrolled 

 in the foremost rank of missionary labourers in the East. 



Family Cyclostomiixze, 



CyCLOPHOBUS ARTHRITICtTS, Th. 



Testa umbilieata, turbinate, solidissima, striata, lineisque spiralibns 

 flexuosis obscure decussata ; sublaavi, non pohta, fuscente castanea 

 fascia lata, alba mediana, interdum circumdata. Interdum colore om- 

 nino alba, spira pallide castanea, et fascia parva castanea sub-mediana 

 ornata. Anfractibus quinque convexis, hand tarde creseentibus ; ulti- 



