1899.] GENERA STREPTAXIS AND ENNEA. 769 



Hah. ad Moiilmeiii (Theobald). 



This is allied to E. ci/Undrelloidea Stol. and to E. seatoni Bedd. 

 (P. Z. S. 1891, p. 315), and intermediate iu size between them ; it 

 is distinguished from the smaller E. ci/Undrelloidea by coarser and 

 more distant sculpture, and by the free part of the last whorl 

 near the aperture being rather shorter. From the larger E. seatoni 

 the present species may be known by its differently shapefl mouth, 

 which, as iu E. cijUndrdloidea, is nearly as high as broad, and by 

 the absence, so far as can be determined in the only specimen 

 available for examination, of the internal columellar plait. The 

 parietal lamella is almost vertical in front, but the crest of it, 

 inside the whorl, is bent towards the centre of the aperture, 

 as in E. cylindrdloidea '. 



The type of E. brevicolUs is a single specimen in the British 

 Museum collection, labelled Daraotha, Moulmein. This shell was 

 obtained with others from Mr. Theobald in 1888, and has hitherto 

 been supposed to be E. njlindreUoidea, of which there is no 

 specimen in the collection. Whether the locality Damotha is 

 correct it is impossible to say ; probably E. ajliudrelloidea and 

 E. brevicollis are representative forms, found on different isolated 

 limestone hills. 



A single specimen of another Ennea belonging to the same 

 group with the last whorl solute near the aperture has been pre- 

 sented to the Britisii Museum by Dr. Hungerford and is also said 

 to be from Damotha, Moulmein. It approaches 0. ci/lindrelloidea, 

 but is still smaller, being only 4 mm. long. It has 8 whorls and 

 is smooth, not oostulate. This is probably an undescribed species, 

 but the only specimen looks slightly distorted, so I shall not 

 propose a name for it. 



Ennea nagaensis G.-A. MS. (Plate L. fig. 22.) 

 l\sta lonqe curvaio-rimata, ci/lindrico-ovata, oblique confertim 

 Jlexuoso-costulata, cereo-albida, apice convexo, obtuso, sutura 

 impressa ; anfr. 7, convexiusculi, ultimus minor, compressus, 

 basi angustior ; apertura auriformis, snhaxialis, sinu sub- 

 rotumlo dextrali, a plicis duabus vulidis intrantihus proximis, 

 unci parietali, altera j^alatali in margine dextro, fere ahscisso ; 

 peristoma albidum, undicpie incrassato-dilatatam, marginibus 

 callo crasso longe ascendente junctis. Long. 4,|, diam. 2 ; ap. 

 loiK/. Ij mm. (perist. incl.). 

 Hub. in montibus Naga dictis (God win- Austen). 

 This shell is allied to E. vara Bs. and E. stenopijlis Bs., the 

 aperture, with its broadly expanded peristome and the subcircular 

 sinus to the right almost cut off by the parietal and palatal plaits, 



• 1 I have beea able, since the above was written, thvough the kindness 

 of Dr. Alcock, Superinter.dent of the Indian Museum, Calcutta, to examine the 

 type of E. cylindrelloidea. The parietal lamella is not curved into a hook, as 

 might be supposed from the figure, J. A. S. B. 1871, pt. 2, p. 171, pi. 7. f. 4, and 

 the°copy of the same- in the ' Conchologia Indica.' The hook-like appearance 

 is due to the sbadii g in the lithograph, intended to represent the curvature of 

 the lamella inside the aperture, having been printed too darkly. 



