224 PEOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



DESCRirXIONS OF TWO NEW SPECIES OF TERRESTRIAL 

 MOLLUSCA FROM THE IIADRAMAUT DISTRICT, SOUTH 

 ARABIA. 



By Jajies Cosmo Melvill, M.A., F.L.S., etc. 



Bead December lA^th, 1894. 



It is unfortunate that no special arrangements were made to collect 

 the Mollusca during Mr. and Mrs. Theodore Bent's first expedition 

 to the almost unexplored region of the Iladramaut, 1893-94. 



Mr. William L)int, of Kcw, Avas appointed Botanist to the expedition, 

 and a very interesting collection of pUuits was made, several of which 

 were new to science, and the results of his work have been recently 

 published in the Kew Bulletin. Two species of land-shells were, 

 however, found by Mr. Lunt, both together on an arid and elevated 

 plateau a few miles inland, about 400 miles cast of Aden, and prove 

 new to science, though allied to known forms in other parts of Arabia, 

 E. Africa, Socoti'a, etc. 



1. BuLiMiNus Ltjnti, n.sp. PI. XIV. Fig. 7. 



B. testa ovato-acuminata, cylindracca, compresso umbilicata, sub- 

 pellucida, anfractibus septem, oblique luugitudinaliter densi-striatulis, 

 columella uniplicata, apertura orbiculari, peristomate albido, nitido, 

 late-reflexo. Long. 27, lat. 15 mm. 



j];(ii. — Plateau 400 miles east of Aden, Iladramaut, South Arabia 

 (Mr. William Lunt). 



This interesting Bulimimis is near to B. latirejlexus, Eeeve, and 

 occupies an intermediate position between that species and B. F&rskalii, 

 Beck., both coming from other parts of Arabia. From the former, which 

 it resembles in its large white reflexed lip and texture, it may be 

 distinguished by there being seven, instead of eight, whorls, and in 

 the greater ventricosity of the body-whorl. From B. Forskalii, which 

 it is like in form, it can be separated easily, the lip being not reflected 

 in that species, and the conspicuous red colour at the outer aperture 

 being here absent. 



Two specimens were collected, both in good condition, though dead 

 shells. I have much pleasure in associating with this sliell the name 

 of its discoverer, Mr. William Lunt, now of the Botanical Gardens, 

 Trinidad. 



2. Otopoma Bentianum, n.sp. PI. XIV. Fig. 8. 



0. testa solida oblique depresso-orbiculan, cxtus albo-calcaria, circii 

 Galium umbilicarem flavescente, anfractibus (piin(pie, yentricosulis, 

 IjEvibus, sub lente supra transversim spiraliter liratis, ultimo anfractu 

 rapido accrescente, infra lajvi, callo nitido, magno, apertura rotunda 

 peristomate incrassato, pauUum reflexo, nitcnte. Long. sp. maj. 15, 

 lat. 24 mm. 



