124 LAND- AND FRESHWATER MOLLUSKS 



however ouly a few with the brown epidermis. Mr. Gude, 

 who has of' late described it after a specimen from Bangaya 

 in the British Museum, has had the kindness to compare 

 the specimens with the type. They vary in altitude of the 

 spire, in the width of the umbilicus, and in the upper 

 margin of the aperture, which is more or less ascending; 

 the last whorl is less descending near the aperture than 

 in the figure of Gude. The largest diameter of the shell 

 varies from 42 to 45 Mill. 



6. Chloritis biomphala Pfr. 



Pfeiffer, Proc. Zool. Soc. Lond. 1862, p. 272.. 



» Mon. Helic. Viv. Vol. V, p. 391. 



Two of the specimens are young and bleached, one adult 

 is bleached and broken; it is however interesting to state 

 that this species, which Pfeiffer knew only from Ceram, is 

 living also on Taliabu. I owe to Mr. Gude, who has just 

 made a special study of Chloritis, the identification of these 

 worn specimens. 



7. Obba marginata Mull., forma major Pfr. 



Pfeiffer, Mon. Helic. viv. Vol. I, p. 396. 



Reeve, Conch. Ic. Helix, fig. 129. 



Rather numerous specimens, which with only one exception 

 have been collected dead, agree sufficiently with a typical 

 specimen from the Philippines; they are however larger, 

 their largest diameter varying from 28 to 31 Mill., and 

 consequently they belong to Pfeiffer's forma major. In shape 

 they vary in altitude of the spire, corresponding to a flatter 

 base. This is, as far as I know, the first locality for more 

 typical specimens, since Martens (Ostas. Landschn. p. 295, 

 PI. 17, fig. 4) has described Helix sororcula from Celebes, 

 and Möllendorff (Binnen-Moll. von den Talaut-Inseln : Abh. 

 und Ber. des Kön. Zool. u. Authropol.-Ethnogr. Mus. zu 

 Dresden, 1896/97) Obba Meyeri from the Talaut-isles. The 

 majority of the specimens is more elevated, but as also 



Notes from the Leydeii Museum, Vol. XXVIII. 



