1871.] F. Stoliczka — Notes on terrestrial Mollusca. 165 



towards the aperture ; the size is also smaller. Mr. Theobald's 

 typical specimen had beside the parietal fold a small tooth about 

 the middle of the inner side of the outer lip, as shewn in fig. 8 ; this 

 specimen perfectly equals in size the type. However, the tooth on 

 the outer lip, upon which Mr. Theobald strongly relied as a dis- 

 tinctive character, is not constant. I found a specimen exactly similar 

 to the type on the Eangoon Pagoda, bat without an outer tooth ; and 

 quite similar specimens have also been collected by Mr. Fedden 

 in the Shan States. The same, but slightly larger, variety occurs 

 in Pegu ; this is represented in fig. 9, pi. vii. Its only difference 

 consists in size, approaching that of Burmanicus. 



Mr. Blanford (1. c. p. 95,) considered the form, called by Theobald 

 Blanfordianus, as identical with Benson's Andamanicus, and both 

 certainly are most closely allied to each other. I possess numerous 

 specimens of the last species, and most of them seem, as compared 

 with Blanfordianus, a little more longitudinally stretched j all have 

 the spire peculiarly depressed,* the whorls being separated by rather 

 deep sutures, and are somewhat convex above ; the costulation also 

 appears to be a little coarser and the umbilicus more spacious ; but 

 all these distinctions are only relative, and it is very difficult to ap- 

 preciate them without a large number of specimens for comparison. 



The animal of Blanfordianus is very similar to that of Burmani- 

 cus, except that the yellow and red colours are paler. The com- 

 parative measurementsf of the two species are : 



Burmanicus. Blanfordianus. 



Typical. Yar. Typical. Yar. Yar. mag. 



Piam. maj., 105 8'-8-6 7-3 7 6 9- m.m. 



„ minor, 7*6 6--5'8 5" 5- 6-2 m. 



Altitudo, 9- 6-2-6-6 5' 5-4 7- „ 



Arracan. Rangoon Pegu. Shan Pegu. 



Pagoda. States. 



* Fig. 6, pi. viii, given in the " Conch. Indica," is in this respect toot a 

 characteristic one. 



f In taking the height of Streptaxis the shell is placed in such a position that 

 the axis of the upper regularly coiled whorls stands vertical, the two last 

 whorls always somewhat deviate from the direction of this axis. 



