226 rROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



DESCRIPTIONS OF FOTTR NEW SPECIES OF ENGINA AND A NEW 

 SPECIES OF DEFllANCIA. 



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



Read January Wth, 1895. 



Last year, when studying tlie various forms associated under the 

 genera Engina, Sistrum, and Feristernia, in our National Collection, 

 the following four species were put aside as meriting further 

 examination ; and it is at the request of Mr. E. A. Smith, F.Z.S., 

 that I now describe them, especially as numerous specimens of one 

 {E. Xatalensis) have now come to hand, and arc in various collections, 

 from South Africa. 



1. Engina Cumingiana, n.sp. PL XIV. Fig. 13. 



E. testa ovata, angulata, solida, gilva, apud apicem acuminata, 

 anfractibus sex, longitudinaliter paucicostatis, transversim liratis, 

 in medio pallida fascia cingulatis, apertura constricta, columella 

 paullulum plicata, labro exteriore incrassato, denticulate. Long. 1 1 -50, 

 lat. 6 mm. 



mih.—St Thomas. 



A single shell, fonning part of the Cumingian Collection in the 

 British Museum. A compact Ricinuloid shell, with acuminate apex, 

 few ribs, transversely banded with delicate lira?, the spaces between 

 them being alternately of slightly darker or lighter shade, the central 

 fascia on the last whorl being lighter, mouth constricted, columella 

 slightly plaited, outer lip denticulate. The last whorl is angidar. It 

 resembles E. contracta, Reeve, to some extent; in form is nearer 

 E. turbt?iella, Kien. 



2. Engina Natalensts, n.sp. PI. XIV. Fig. 12. 



E. testa oblonga, fusiformi, solida, ad apicem attenuata, apud basim 

 subcontracta, anfractibus scptem, longitudinaliter obscure costulatis, 

 undique transversim tenuistriatis, albis, brunneis nudulis variegatis et 

 tessellatis, apertura oblonga, libro exteriore incrassato, denticulato. 

 Long. 10-12, lat. 4 mm. 



Ilab. — Natal (Mr. Furse and others). 



Allied to E. concinna, Beeve, with which it has been confounded 

 hitherto. The base is more produced than in that species, which is also 

 a little broader ; the tessellated marking in the species before us is 

 more variegated, and at first sight irregular, and at the same time it is 

 precisely the obverse of that obtaining in concinna, the tips of the 

 nodules being brown, the main body of the shell white. In concinna 

 the tips of the nodules in tlie centre of the whorls are white, forming 

 a slightly variegated median band. The disposition of the marking in 

 Natalensis is quite regular when carefully examined. Immediately 



