Notes upon a Collection of Shells from Borneo, Etc. 23 



NOTES UPON A COLLECTION OF SHELLS FROM BORNEO 

 WITH DESCRIPTIONS OF NEW SPECIES. 



By T. H. Aldrich. 



(Read March 5, 1889.) 



During the past year I had the pleasure of receiving a small collec- 

 tion of shells from William Doherty, Esq., formerly of Cincinnati, 

 who gathered them in f he Kusan and Penggiron districts in South- 

 eastern Borneo and irom the Kinan and Kiwa Rivers. 



The localities are comparatively new, and the distribution of Bornean 

 species so little known, that this list is offered to extend the informa- 

 tion derived from the collection. Examples of many of the species 

 mentioned are now in the collection of the Society. 



1. Clea nigricans, Adams. 

 Four specimens received, two young and two adult. 



2. Melania brookii, Rve. var. 

 The specimens differ from the typical form considerably. One 

 example is subscalaroid, and all are nearly smooth, the more adult 

 ones show traces of tubercles on the body whorl, which is also angu- 

 lated at its periphery. 



3. Melania tube re u lata, var. malayana, Issel. 



Prof. Brot, of Geneva, Switzerland, has kindly confirmed my deter- 

 mination, as well as the other fresh water species mentioned. 



4. Ampullaria pilula, Rve. 



Only young specimens received, but the determination is believed 

 to be correct. 



5. Paludomus lacunoides, n. sp. PI. III., figs. 1, ia, ib and ic. 

 Shell smooth, solid, obovate, spire moderate, whorls five ? con- 

 tracted below the suture and partially shouldered ; color olive, in 

 young specimens three broad bands are upon the body whorl and 

 show through it ; suture distinct. Base of body whorl obsoletely stri- 

 ated ; aperture ovoid, over half the length of the shell ; outer lip 

 slightly denticulated, columella white, bordered with a flattened semi- 

 lunar space behind. 



