212 NERBUDDA DISTRICT. 



roots, and that, therefore, there could have been little abrasion. He 

 concludes, however, from the fact of a bed containing abundant remains 

 of shells having been found in continuation of the bed in which these 

 trees lay, that they could not have grown where they are now found. 



Now the force of this latter argument rests solely on the erroneous 

 impression under which Dr. Spry rested, that Physa Prinsepii and its 

 associated shells, were marine, and the conclusion is therefore unten- 

 able : while at the same time the fact of these remains having undergone 

 a siliceous fossilization in a calcareous bed is one to which many well 

 known parallels might be adduced. 



Goraha, measures 0.88—0.22. Other specimens are larger, some being very 

 nearly 1 inch in length. 



2. Lymncea fusiformis (n. s.) A small species common at Goraha and Pulsagur. A 



specimen of 4 whorls retaining the shell, from the latter place, measures 0.40 

 —0.14. Some casts, however, measure as much as 0.65. The last whorl is 

 nearly three times as long as all the rest. 



3. Lymncea elegans ( n. s.) A smaller species than the above but otherwise not unlike it. 



It is common at Telankheri and Pulsagur. An adult specimen of four whorls 

 from the former place, measures 0.44 — 0.1 5. 



4. Lymncea Hislopiana (n. s.) A small species common at Goraha and Pulsa- 



gur. A specimen from the latter place retaining the shell, of 4 whorls, measures 

 0.40—0.14. 



5. Lymncea tumida (n. s.). A small species of 3 whorls, common at Pulsagur. A full 



sized specimen measures 0.34—0.16. 



6. Lymncea infrequens (n. s.) A single specimen only found; whorls rather tumid, 



0.44 — 0.18. It comes nearest to L. subulata, but is little more than one third as 

 large. 



7. Lymncea obtusa (n. s.) A well marked species from Pulsagur ; whorls four, which 



increase rapidly, 0.54 — 0.20. The body whorl is three times as long as the others. 

 There are in addition to the above several, which in the absence of better specimens can- 

 not safely be discriminated, but which appear to be distinct species. 

 Physa. 



1. Physa Prinsepii Sow. This species varies greatly in form and size; yet the most 

 extreme variations appear to be only varieties of the same species. It is the most 



