141 



GN A SMALL COLLECTION OF LAND AND FRESH-WATER SHELLS 

 FROM OMAN, ARABIA. 



By Edgah a. Smith, F.Z.S., etc. 

 Bead May llth, 1894. 

 A FEW species of terrestrial and fluviatile shells from Oman recently 

 presented to the Bi-itish Museum by Dr. A. S. G. Jayakar, of Muscat, 

 are of particular interest, being the first received by the Museum 

 from that locality, and no collection having hitherto been recorded 

 from that part of Arabia. Of the eight species sent by Dr. Jayakar, 

 three appear to be undescribed. They were collected in the interior 

 of Oman, from Jebel Akhdar and places at the foot of it, and are as 

 follows : — 



1. Helix Derbentina, Andrzejowski. 



A single specimen only, apparently belonging to this species. 



2. BuLinnNus Omanensis, n.sp. Fig. 1. 



Testa elongata, cylindraceo-ovata, rimata, alba, lineis incrementi 

 obliquis tenuibus striisque spiralibus tenuissimis sculpta; spira con- 

 vexe conoidea, ad apicem obtusa; anfractus 7 convexiusculi, ultimus 

 antice lente ascendens ; apertura inverse auriformis, cum perist. 

 longitudinis totius J fere aequans ; peristoma undique late dilatatum 

 at reflexum, marginibus callo tenui junctis. Longit. 20-24, diam. 

 10-10-5 mm. ; apertura intus 7"5-8 longa, 5 lata. 



Hah. — Green Mountain, Oman. 



Fig. 1. BuUminus Omanensis. 

 ,, 2. ,, Jousseaumei. 



,, 3. Limncea Arabica. 



The peristome of this species is very like that of the well-known 

 B. labiosus, Miiller. That species, however, has a much more pointed 

 spire and is furnished with a promincat tooth or fold on the columella, 

 a feature entirely absent in £. Omanensis. B. labrosus, Olivier, is 

 rather like the present species as regards form : it is, however, 

 much larger, the aperture is more perpendicular and longer, and 

 the columella is more plicate. 



