8 0. F. von MoUendorff — On a collection of Japanese Clausilia?. [No. 1, 



It is well characterised by the small size, the less solid shell, the sculpture, 

 the less oblique upper parietal lamella. 



i8. Subgroup of Clausilia platydera, v. Mart. 



15. Clausilia platydeea. 



1876. Clausilia platydera, v. Martens, Jahrb. D. M. G. iii, p, 362. 



1877. Bottger, Glaus. Stud. p. 67. 



1878. Syst. Verz. p. 57. 



1879. Kobelt, Fauna Jap. p. 91, t. ix, f. 9. 



var. ELO^GATA, Bottger, Syst. Verz. Clausilia, p. 57. 



Mr. Hungerford collected some elongate slender forms of 27^ — 29^ 

 millim. in length at Nara. These I think are Bottger's var. elongata. 



Another form was found numerous near Kobi. It is more ventricose, 

 has a more solid shell, a broader and rounder aperture than the type ; the 

 lunella is shaped nearly as in Bottger's var. lamhda (Claus. Stud. p. 67), 

 forming a right or obtuse angle with the flica principalis. On the other 

 hand, the peristome is always solute above and the subcolumellar lamella 

 always reaches the margin, while Bottger says of his variety, " peristoma 

 superne hand solutum," " lamella subcolumellaris sithimmersa.^^ This form 

 therefore shows a transition from the type to var. lamhda, and might deserve 

 a new name as a variety or a subvariety. 



16. Clausilia fusangensis, n. sp., PL T, Fig. 8. 



Testa gracili-fusiformis interdwn decollata^ soUdula, striatula, cornea ; 

 anfr, 12 convexiusculi, sutura satis profunda disjuncti ; apertura recta^ 

 hasi recedens, ovato -piriformis, peristoma continuum, soliUum, undique ex- 

 pansum et reflexum, alholahiatum. Lamella super a valida, ohliqua, margi- 

 nalis, cum spirali continua, infera a margine satis remota oblique ascendens^ 

 furcata, in prof undo dextrorsum retorta, intus lamellam spiralem superans, 

 subcolumellaris immersa. Plica principalis mediocris, lunella cum plica 

 palatali superiore et inferiors parvis connexa figuram litterae graecae \ 

 instar formans, Clausilium angustum. 



alt. 27 — 30, lat. 5, apert. long. 6, lat. 4 millim. 



Hab. Chin-sin-ji. 



Nearly related to Clausilia platydera, especially to the var. elongata;, 

 this fine form offers by the much slenderer shape, the invisible subcolumel- 

 lar lamella, the more twisted lower parietal lamella etc., sufficient differ- 

 ences to deserve a new name, which I have formed from Fusang, the old 

 poetic name of Japan. 



17. Clausilia aurantiaca, Bottger. 



1877. Clausilia aurantiaca, Bottger, Claus. Stud. p. 68. 



1878. Syst. Verz. p» 57. 



Jahrb. D. M. G. v, p. 101, t. iv, f. 6. 



1879. Kobelt, Fauna Jap. p. 95, t. ix, f. 11. 



