CHLORITIS LANSBERGEANA. 141 



Recently the Leyden Museum received a collection of 

 mostly marine shells from Mr. C. L. J. Palmer van den 

 Broek, collected by himself at Fak-Fak, on the west coast 

 of Dutch New Guinea. Among them were a few landshells, 

 two of which were agreeing in every respect with Dohrn's 

 description and figures of Chloritis landshergeana. I agree 

 with Dohrn '), Tapparone Canefri ^), Pilsbry ^) and Gude ^) 

 in giving this species its systematic position in the genus ^) 

 Chloritis^ near C. circumdata Fér., C. maforensis Tapp. 

 Can. and C. pervicina Smith. P. and F. Sarasin ^), in 

 placing it in the genus Planisjnra, are obviously misled 

 by the superficial resemblance of this shell with P. zodiacus 

 Fér., and by its supposed occurring in Celebes. 



Chloritis maforensis Tapp. Can. PL 7, f. 1«, \h. 



Helix maforensis^ Tapparone Canefri, 1880, Ann. Mus. Civ. 



Genova, XXIV, p. 139, T. I, f. 1—3. 

 Hab. — Waigeoe, island west of New Guinea. Mr. Bernstein. 

 Misool, island west of New Guinea. Mr. Iloedt. 

 Morotai?, island north-east of Halmaheira. 



Mr. Bernstein. 



This species and the nearly allied C. circumdata Fér. 

 (f. 2a, 2h) can easily be distinguished by the shape of the 

 aperture, and by the last whorl much more descending in 

 front and the greater obliquity of the aperture in the latter 

 species (PL 7, f. Iff, 2rt). The other differences between the 

 two species, mentioned by Tapparone Canefri, viz. larger 

 and thicker shell, different colouring of the bands, and 

 larger and deeper umbilicus, do not prove to stand the 

 test (PL7, f. l/>, 2/;). 



Largest specimen, diam. maj. 31,5; min. 26,5; alt. 13 m.M. 



Smallest specimen, diam. maj. 26; min. 21,5; alt. 11 m.M. 



1) Dohrn, 1. c. 



2) Tapparone Canefri, Ann. Mus. Civ. Genova, XXIV (1886), p. 142. 



3) Pilsbry, Man. of Conch. 2nd series, vol. IX, p. 119. 



4) Gude, Proc. xMal. Soc. Vll (1906), p. Ill, 



5) The two first quoted authors call it still a "section" of the genus Helix. 



6) P. und F. Sarasin, Landmollusken von Celebes (1899), p. 197. 



Notes from the Leyden JVIuseum, Vol. XXXV. 



