NOTES ON TONKINESE CLAUSILL2A, WITH ILLUSTRATIONS OF 
SOME UNFIGURED FORMS, AND THE DESCRIPTION OF A NEW 
SPECIES. 
By E. R. Syxzs, B.A., F.L.S., ete. 
Read \1th April, 1902. 
PLATE III. 
Recentiy I have examined a large series of specimens, some named by 
Dr. von Moellendorff and others needing determination, which were 
collected in Tonkin by Herr Fruhstorfer. It became necessary, for 
my own use, to compile a list of the forms recorded from the district, 
and I thought that the references, etc., might be of service, if 
published in an alphabetical list. In addition to those catalogued, 
one species, C. Dautzenbergi, will, 1 understand, be described by 
Dr. von Moellendorff, and I append the diagnosis of another, 
C. Chiemhoaensis, which appears to me to be new. ‘The present 
opportunity has also been taken to illustrate a number of species 
and forms, described but not figured by Dr. von Moellendorff. 
Localities given in the following references without any recorder’s 
name are those cited in the original descriptions of the forms; the 
letter (F.) denotes unpublished localities due to the energy of Herr 
Fruhstorfer. 
Geographically the country is not well defined, but may, I think, be 
taken broadly as the region watered by the Song-Ka. 
LIST OF SPECIES. 
1. Arpovrnrana, Heude. 
Clausilia Ardowiniana, Heude: Moll. terr. Fleuve-Bleu, 1882, 
p- 118, pl. xxi, fig. 4. Bavay & Dautzenberg: Journ. de 
Conchyl., 1899, vol. xlvii, p. 50, pl. iii, fig. 3. 
Synonym: Wenia horrida, Mabille : Moll. Tonk. diagn., 1887, p. 16 ; 
Bull. Soc. Malac. France, 1887, vol. iv, p. 109, pl. iii, figs. 9, 10. 
Hab.—Baie d’Aiong (B. & D.). 
2. aurtcoma, Bav. & Dtz. 
Clausilia auricoma, Bavay & Dautzenberg: Journ. de Conchyl., 
1899, vol. xlvu, p. 277, pl. xii, fig. 2. 
HTab.—Cha-Ra and Lakes Ba-Bé. 
3. Baserensis, Bav. & Dtz. 
Clausilia Babeensis, Bavay & Dautzenberg: Journ. de Conchyl., 
1899, vol. xlvii, p. 278, pl. x1i, fig. 3. 
Hab.—Lakes Ba-Bé. 
4. Bacxanensis, Bav. & Dtz. 
Clausilia Backanensis, Bayvay & Dautzenberg: Journ. de Conchyl., 
1899, vol. xlvii, p. 281, pl. xu, fig. 5. 
Hab.—Bac-Kan. 
