XVIII. NEW SPECIES OF SLUG-LIKE MOLLUSCS 



BELONGING TO THE FAMILY ZONITIDAE 



FROM THE DAWNA HILLS, TENASSERIM, 



COLLECTED BY Dr. F. H. GRAVELY. 



By Lieut. -Colonel H. H. Godwin-Austen, F.R.S. 



(Plate XVIII.) 



So long ago as 1912 I received a collection of shells made in the 

 winter of 1911 in the Amherst District, Tenasserim, by Dr. F. H. Gravely 

 of the Indian Museum, Calcutta. Undoubtedly the most interesting 

 new species obtained are those I now describe, slug-like forms belonging 

 to the genera Anstenia and Girasia. I am much indebted to Dr. 

 Gravely for seeing them, and I have much pleasure in naming one 

 Girasia after its discoverer. Unfortunately there are few examples to 

 deal with, and I have hesitated to cut w^ type specimens to see the 

 internal anatomy. It is, I know, very difficult at certain seasons to 

 find many specimens of these molluscs ; if it be possible 6 at least should 

 be collected, the whole anatomy can then be seen and a couple reserved 

 for the Museum. 



The photographs have been made by my friend Mr. J. S. Gladstone, 

 they are very good and my best thanks are due to him. 



These and allied genera are very abundant at the wettest season 

 of the year, but with diligent search under stones and logs of wood 

 they may be found at any time. Their preservation in alcohol is a 

 difficulty and the collector must be prepared to face leeches and 

 malaria. From the malacological point of view they form a most in- 

 teresting group. Their exact distribution specifically is little known. 

 Take for instance Girasii peguensis. Theobold.^ Nothing is known of 

 those inhabiting Hill Tipperah, the Chin Hills, Northern Burma and the 

 Shan States, this large forest- clad area would yield many many species, 

 probably even new jjenera. 



This paper would have been published before now, but the large 

 Abor collection took \\\) much of my time. The times besides have been 

 against and affected work of this kind. 



Girasia ? sukliensis, n. sp. 

 (PI. XVIII, figs. 1—3.) 



Locality.— ^\Mi, Dawna Hills, 900-2,300 ft., Tenasserim, November, 

 1911 (F. H. Gravely). 



Shell extremely thin, filmy and undeveloped ; colour near the 

 rounded apex white, rest pale green. 



Size. — Major diameter about 9 mm. 



1 Moll. India, vol. I, p. 227, pi. lix, figs. 6, 6a, 66 animal, 6c, (xl shell. 



