1876.] collected during the Dajla Expedition. 183 



Hab. — KMsi and Naga Hills, in damp situations among decaying 

 vegetation at aboivt 4000 — 5000 feet, not by any means abundant. I at first 

 considered it to be a Jerdonia, from its remarkable similarity in external form 

 to J. trochlea, Bs., from Southern India, but on comparison of the opercula 

 I found a considerable difference. It is a smaller sbell tban J. trochlea. 



3. Ctathopoma Garoejstse, n. sp. 



Sbell openly umbilicated, turbinate, white, multilirate. Whorls 5, well 

 rounded ; there are six well marked longitudinal ribs on the last whorl, 

 the interval between the 4th, 5th, and 6th being wider than that between 

 the ribs above. Succeeding these below near the umbilicus can be counted 

 eight very close lines of ribbing ; the whole surface between this ribbing is 

 sharply and regularly striate, giving it rather a lace-like appearance. Spire 

 conoid, apex high and papillate. Peristome simple, quite circular, single. 

 Opercidani exposed in front close to the margin of the aperture, multispiral, 

 flat in front, thick and shelly in appearance. Animal not observed. 



Alt. - 08, major diam. - 09 in. 



Hab. — It was first taken on limestone rocks in the South Graro Hills, 

 and was particularly abundant at Bywuk on the Sumessary river in the 

 limestone cliff on the left bank of the river ; it must extend all along the 

 southern face of the hills with the run of the Nummulitic rocks, for I have 

 two specimens in my collection from the South Jaintia Hills. G. Garoense 

 is very like the South Indian G. Deccanense, W. Blf ., in the sculpture and 

 position of the operculum. 



No species of Cyathopoma have as yet been obtained anywhere to 

 the north of this line of hills, not one occurred among the large collection 

 of shells made in the Dafla Hills, the most eastern part of the Himalayan 

 range that has as yet been explored. 



EXPLANATION OF THE PLATES. 

 Plate VII. 



Fig. 1. Cyelopfiorus nivicola, n. sp., nat. size. 



„ 2. Spiraciilum Nevilli, n. sp., nat. size. 



„ 3. Pterocyclos mac/nus, n. sp., nat. size. 



„ 4. Spiraciilum hispidum, Bs., sutural tube, nat. size. 



,, 5. Megalomastoma tanycheilus, n. sp., nat. size. 



„ 6. Diplommatina Homeii, n. sp., enlarged. 



„ 7. levigatus, n. sp., enlarged. 



„ 8. Austeni, Blf., large var., enlarged. 



„ 9. Alyeceus notatus, n. sp., enlarged. 



„ 10. Theobaldi, Bs., var., the operculum, enlarged. 



„ 11. mutalus, n. sp., enlarged. 



„ 12. Dqflaensis, n. sp., enlarged. 



„ 13. Fomatias grandis, n. sp., slightly enlarged. 



