60 A Visit to Damma Island: 



The species of Neritma, Septaria, and Cassidula also belong 

 to forms which have a great range, as might be expected, 

 for the species of these genera, in many instances, are notorious 

 for their wide distribution. 



In comparing the terrestrial fauna of Damma Island, we 

 naturally seek a comparison with that of the most adjacent 

 localities. The islands of Timor and Timor- Laut are the 

 largest tracts of land in the vicinity, and Damma lies about 

 midway between them, but a little more northward. The 

 terrestrial mollusca of both Timor and Timor-Laut are more 

 or less perfectly known, and there certainly is a close resem- 

 blance between the shells of those islands, especially Timor- 

 Laut, and those occurring at Damma. All the genera found 

 by Mr. Walker at the latter locality are represented on 

 Timor-Laut with one exception — the Macrochlamys, and the 

 Lamprocystis mentioned by Dr. O. von Mollendorff* may be 

 considered its equivalent. In one instance the species are 

 extremely closely related, namely, Eulota subcornea with 

 E. hemi'sphce7*ica, and in the case of Gorasia and Leptopoma 

 the same species occur in both localities. 



1. Macrochlamys pseadosuccinea. 



Testa minute perforata, conoideo-depressa, nitida, semipellucida, 

 flavo-cornea, lineis incrementi tenuissimis striata ; spira brevis, 

 conoidalis, ad apicem obtusiuscula ; anfractus 5, convexiusculi, 

 infra suturam concave marginati, ultimus in medio acute rotun- 

 datus, sed haud angulatus, vix descendens ; apertura oblique 

 lunata ; peristoma tenue, margine columellari leviter incrassato, 

 superne dilatato et reflexo, umbilicum semiobtegente. 



Diam. maj. 12 millim., min. 10 3, alt. 8 ; apertura 6 lata, 5 alta. 



Four specimens of this species were collected by Mr. Walker. 

 The largest, the measurements of which are given above, has 

 half a whorl more than the rest and is probably adult. 



In the younger shells the columella is more upright than 

 in the more mature shell, and forms a more or less distinct 

 angle with the basal margin of the aperture. 



M. succinea, Pfr., from the Philippines, recalls the general 

 appearance of this species. It is, however, smaller, and yet 

 has more numerous whorls. 



2. Nanina (Xesta) dammaensis. 



forata, depresse conoidea, in medio c 

 am linea rufa angusta supra caring 



* Nachrichtsblatt deutsch. malak. Gesell. 1892, pp. 81-102. 



Testa minute perforata, depresse conoidea, in medio carinata, fusco- 

 cornea, interdum linea rufa angusta supra carinam pallidam et 



