MOLLUSCA OF INDIA. 137 



whorls 6, small and closely wound near apex, somewhat convex ; 

 aperture lunate, directed laterally downwards ; peristome thin, 

 sinuate below, obliquely descending at columellar margin and very 

 slightly reflected. 



Size: maj. diam. 12'5, min. 11'3; alt. axis 5*4 mm. 



Animal. Has a right shell-lobe, and the mucous gland an over- 

 hanging hooked process, well seen in a soaked-out specimen. 



The jaw has a strong central projection, and the radula is like 

 that of typical MacrocMamys. 



In another specimen the curious shaped spermatophore (or what 

 I take to be such), figured on Plate XCIV. fig. 3, was seen and 

 mounted on a slide ; it is shown as it appeared squeezed out of the 

 spermatheca. I have lately soaked out two more specimens, bub 

 in neither did I find it again : the form is so abnormal that 

 verification is necessary ; we must not be too sure of these microscopic 

 objects in specimens treated in this way. 



Mr. Ogle obtained it also in the Diyung Valley, Singpho Hills, 

 Mr. Chennell sent it to me from the Lhota Naga Hills, and I found 

 it myself originally in the North Cachar Hills. 



These shells will be duly figured in another Part with other 

 glassy forms of the genus, such as lecytliis, lionesta, &c., together 

 with the anatomical details, which are ready. 



On nearing the completion of another Part, I must acknowledge 

 the title of this work lays me open to criticism. It was my original 

 intention to include the Freshwater Molluscs, and in the Prospectus, 

 referring to the ' Conchologia Indica,' I promised to " include 

 species not published in that work and the numerous species that 

 have since been discovered." I have only partially succeeded. As 

 time went on, the acquisition of a large number of species preserved 

 in alcohol belonging to the family Zonitidae has led to far more 

 illustration of anatomical details in this family alone than I ever 

 anticipated. Although these plates will not interest so many 

 individuals as plates of new species of shells would have done, 

 yet I have felt detail to be much more important and I trust of 

 more use towards solving questions of relationship and distribution. 



There still remain to be examined very many species even in 

 this family from Darjiling and Assam, Central India and Ceylon, 

 the Audamans, &c. Several families have not been dealt with, 

 only a few dissections have been made in the Heiicidae ; happily, 

 Mr. H. A. Pilsbry has been at work at some of the Eastern 

 genera, and figured the genitalia and teeth of the radula. The 

 Zonitida) yet remain the least known group, especially the minute 

 forms. 



I well know how vast the area of British India is, yet I think 

 the majority of naturalists will agree with me, the limit of political 

 boundaries cannot be tolerated. However, one of my critics, writing 



