118 THE NAUTILUS. 



Type locality: Lac de Tondano, N. Celebes. 



It is not entirely certain that Quoy and Gaimard's name can 

 be retained for this species. 



Frauenfeld (Verzeichniss, Paludina, 1864, p. 571) has con- 

 sidered it to be the same as Lesson's P. tricostata from New 

 Guinea described in 1830 (Voy. Coquille, Zool., II, p. 349). 



Von Martens (Moll. Weber, 1897, p. 21) has also made the 

 same suggestion. If so, Lesson's name would have priority. 



Lesson did not figure his species, but his description may be 

 translated as follows: 



' * Shell conic, inflated, of a uniform yellowish-green color, 

 ornamented with vertical strije, very fine and very close to- 

 gether. Spire moderate, conic, acute, with convex whorls sep- 

 arated by a linear and excavated suture. The fifth whorl is 

 the largest, inflated and dilated, three prominent keels mark its 

 contour, beginning on the preceding whorl. These three light 

 lineations form a ribbon-like, flat carina. The aperture is as 

 high, as wide, rounded, with a thin, sharp lip and smooth on 

 the columellar border, thickened a little at its base by a small 

 lamella, which covers in part the narrow umbilicus. 



"Several individuals in all respects alike were 7 lines in height 

 and 6 in diameter. This Paludina inhabits the sweet, fresh 

 waters of the brooks of New Guinea." 



While in some respects this description would apply to V. 

 costatus, the dimensions given, alt. 17, diam. 15 mrn., if from 

 mature specimens, would indicate a much smaller and more 

 globose species and his statement that the three lirations form 

 a flat, ribbon-like (rubanee et aplatic) carina would seem to in- 

 dicate that they were close together and, probably, at the peri- 

 phery of the shell. 



Moreover, Tapparone-Canefri (Fauna Moll. N. Guinea, Pt. I, 

 1883, p. 23) states that Beccari and d'Albertis found nothing 

 like it in their collections. On the other hand, Pilsbry in com- 

 menting on another of Lesson's lost species, Partula lineata 

 (Man. Con., XX, 1909, p. 312), remarks on "the general re- 

 liability of the locality records in the Zoology of the Coquille." 



Thinking that possibly Lesson's type had been preserved in 

 the Paris Museum, I requested Dr. Louis Germain to ascertain 



