344 Contributions to Indian Malacology. [No. 2, 



Hab. in montibus Arakan a Pegu secernentibus. 



But two perfect specimens of tbis sbell occurred to me at Modi- 

 toung on the Prome and Tongoop road, together with Alycosus gra- 

 phicus, &c. It resembles D. pachycheilus, B. in the shape of the 

 mouth, but is distinguished by the slighter rise of the last whorl, 

 and by its subremote costulate sculpture, which, together with its 

 less rounded aperture, serves also to distinguish it from D. diplochei- 

 lus, B. D. pullula, B. and D. Blanfordiana, B. the two latter of 

 which are closely costulated, and the first named smooth. 



I have met with two other species of Diplommatina in Pegu, both 

 apparently undescribed.* The genus had not previously been met 

 with in the Burmese peninsula. 



During the past year (1861) I have found Uydrocena pyxis, B. 

 as far South as the neighbourhood of Henzada. Cycloplwrus ful- 

 guratus, Pfeiffer, C. Theohaldianus, B. and O. patens, appear to occur, 

 the former abundantly, the others sparingly, throughout the greaterr 

 portion of Pegu, west of the Irrawadd} r . A small Pupina is com- 

 mon at Thondoung near Thayet Myo and in several places furthe 

 south. 



Leptopoma aspirans, B. occurs among Captain Ingram's Arakan 

 collections. Two large species of Cycloplwrus, one of which may 

 perhaps be a variety of C. aurantiacus, Schum. were found near Ton- 

 goop. A solitary specimen of a small Helicina, allied to H. Anda- 

 manicq, B. was obtained from Ramri Island.f 



Thayet Myo, August, 3861. 



Since the above paper has been written, undescribed forms have 

 accumulated upon my hands. Of these the most interesting are a 

 second species of the genus Hypselostoma from Ava, whence I have 

 also had the good fortune to obtain two more Alyccei and two 

 Dvplommatince, as well as a very singular little operculate shell allied 

 to the anomalous Pterocyclos liispidus, Pearson. Two new species of 

 Helix of the section plectopylis of Benson have also occurred to me 

 and a very considerable number of other novelties. 



Bassein, March, 1862. 



* Two other distinct species have since been obtained in Upper Burma. 



f Both Leptopoma aspirans and the small Helicina referred to above, have 

 since been found abundantly in the South Western extremity of Pegu. They 

 are there associated with the Darjiling and Khasi Helix plectostoma 3 B. 



