316 S. A. Hill — Solar Thermometer Ohservations at Allahabad. [Ko. 4, 



operculum has on the inner side a small disli-like prominence with, a 

 central nucleus, the outer side is more convex than in the last species. 

 Axis 45, diam. 21, apert. diam. 15 mill. As the author does not mention 

 how many specimens he found of this species which accompanied fl, 

 ele^has, it may be but an individual deviation. 



HYDHOCENID^. 



57. Georissa MONTE rosatiana, Godwin-Aueten & G. Nevill, 



Godwin-Ansten & Nevill, Proc. Zool. Soo., 1879, p. 739, t. lix, f . 6. 



Buket Pondong (Dr. Townsend^ B. Hungerford) . 



68. Geoeissa semisculpta, Godwin- Austen & G. Nevill. 



Godwin- Austen & Nevill, 1. c, p. 740, t. lis, f. 8, 8(X. 



Based on a broken specimen from Buket Pondong, not found by 

 Mr. Hungerford. 



I have not seen any freshwater shells from Perak ; the second 

 volume of Nevill's Handlist (1884) mentions only the following species 

 from that region :— 



p. 6. Ampullaeia TUiiBiNis, Lea, var. subampullacea, G. Nev. 

 Perak (Br. Townsend). 

 p. 22. Paludina bengalensis. Lam., subspec. poltgramma, v. Mart, 

 Qualla Kangsa (Dr. Toivnsend), 



p. 256. Melania episcopalis, Lea. 

 Qualla Kangsa (Dr. Toiunsend) . 



p. 280. Melania jugicostis, Hanley, 

 Qualla Kangsa (Dr. Townsend) , 



Manila^ August^ 1886, 



XVII. — On Solar Thermometer Observations at Allahabad. — By S. A. 

 Hill, B. Sc, Meteorological Bejporter to the Gover^iment of N.-W, 

 Po'ovinces. 



[Received October 26th ;— Read November 3rd, 1886.] 



In April, 1883, I sent to the Society a paper on the measurement 

 of Bolar radiation by means of the black-bulb thermometer in vacyiio,* 

 in which paper a very decided variation of solar heat emission dui'ing 



* See Journal Vol. LII, Part II. 



