Mr. W. H. Benson on new species of Burmese Helices. 253 



The spire is more depressed and the apex less prominent than 

 in H. Theodori, Phil. ; the shell also is more solid, the aperture 

 wider, and the columellar lip descends moj-e horizontally. 



10. Helix Laidlayana, n. s., nobis. 



Testa constricte perforata, sinistrorsa, turbinato-depressa, tenui, ob- 

 lique striata, striis confcrtissimis spiralibus decussata, nitidiuscula, 

 transbiceute, albida, fascia 1 supera angusta, rufo-castanea, peri- 

 pbperiaui tangente, interdum 1 supera lata, et altera infera rcnio- 

 tiuscula ornata ; periomphalo ct parieto apertnrali castaueis ; spira 

 dcpresse conoidea, apice obtusiusculo, svitura leviter iinpressa ; 

 anfractibus .5 sensim accrescentibus, ultimo ad peripbferiani angu- 

 lato, autice breviter desceudente, subtus convexo ; apertura valdc 

 obliqua, subquadrato-luuata ; peiistomate recto, acuto, margiue co- 

 luinellari subrecte desceudeute, auguste reflexo, perforatiouem cou- 

 strictam subtegeute. 



Diam. major 27, minor 23, axis 15 mill. Apert. 15 mill, lata, 13| 

 alta. 



Ilab. in Provincia Beugaleusi Bhecrbhoom, ubi cxemplum unicum 

 Junius dctexit J. W. Laidlay ; nuperrime in Proviucia Orissse, 

 nou procul ab urbe Cuttack, exempla majora non raro invenit 

 W. Theobald. 



Named after a former Secretary of the Asiatic Society of 

 Calcutta, to whom I am indebted for a specimen found by him 

 many years ago in the region of the late Santhal insurrection. 

 The rediscovery of the shell in about 20° N. lat., as well as the 

 detection of H. Capitium in the same quarter, shows that these 

 species range through nearly .5 degrees of latitude. The colour- 

 ing of H. Laidlayana has much resemblance to that of H. qucBsita, 

 Fer., but the shell has nearer relations to //. interrupta, nobis, 

 and H. trifusciata, Miill. It difiFers from H. interrupta in colour, 

 depressed form, greater number of whorls, contracted perfo- 

 ration, descent of the last whorl above the aperture, and in the 

 disposition of the bands. When a single broad dark band is 

 present in interrupta, it touches the angulatc periphery. From 

 //. Z-fasciata it differs in lustre, less depressed form, want of 

 solidity, contracted perforation, more vertical columellar lip, and 

 in the disposition of the bauds, that which is above the periphery 

 in S-fasciata never touching the angle. The colour of the pcri- 

 omphalus and parietes of the aperture is also peculiar. 



Among the known Burmese Helices, H Achat.ina, Gray {an- 

 yuina, Gould), var. /3, Pfr., was taken by Mr. Theobald at ^laul- 

 main, and at the Rangoon Caves on the Salween River. A 

 small variety of H. refuga, Gould, occurred at Kwadouk, near 

 Thyet Myo, on the Northern Frontier, and an interesting dex- 



