18(56.] MR. H. ADAMS ON NEW FORMOSAN SHELLS. 319 



my brother and myself in the genus Pupinella, from which, however, 

 on further consideration, I think it would be well to separate them. 

 These species form a natural group having the texture of Pupinella, 

 but with a posterior sinus in the aperture as in Pupina, and for which 

 I would suggest the name Pupinopsis. 



13. Limn^ea SWINHOEI, H. Ad. (PI. XXXIII. fig. 13.) 



L. testa ovata, fragili, irregulariter striata, pallide cornea ; spira 

 acuminata; anfr. 4, convexiusculis ; apertura oblong o -ovata, -f 

 iotius longitudinis aquante ; columella valde sinuata ; labro flex- 

 uoso, in medio subsinuato. 



Long. 21, lat. 12 mill. 



Hah. Takow, Formosa (Mus. Brit.). 



14. Segmentina swinhoei, H. Ad. (PI. XXXIII. figs. 14, 

 14 a.) 



S. testa depressa, orbiculari, concavo-convexa, nitida, luteo-cornea, 

 late umbilicata ; anfr. 5, apicalibus arctissimis, excavatis, ultimo 

 declivi; sutura impressa ; apertura obliqua, lunata, fauce in 

 /undo dentata. 



Diam. maj. 10, min. 9, alt. 4 mill. 



Hab. Tungkang (fifteen miles below Takow), also in ponds and 

 rice- fields at Takow, Formosa (Mus. Brit.). 



15. Unio swinhoei, H. Ad. 



U. testa tenui, ovali-elongata, inccquilalerali, convexiuscula, antice 

 circulari, postice dilatata, subrotundata ; epidermide fusco-cas- 

 tanea induta ; margine dorsali subrecto ; umbonibus parvis, undn- 

 latis, erosis ; dentibus exilibns, rectis, ad marginem parallellis ; 

 margarita argent ata. 



Long. 60, alt. 39, lat. 2? trill. 



Hab. Formosa (Mus. Brit.). 



DESCRIPTION OF PLATE XXXIII. 



Fig. 1. Nanina (Acusta) assimilis, p. 316. 

 2. Helix {Plectotropis) fulvicans, p. 31<i. 

 .3. (Canuena) bairdi, p. 316. 



4. 4«. (Camana) succincta, p. 316. 



5. Bulimus (Amphidroinus) formosensis, p. 317. 



6. Clausilia (Laciniaria) exilis, p. 317. 



7. Clausilia {Phadusa) formosensis, p. 317. 



8. Ennea (Elma) swinhoei, p. 317. 



9. Cyclotus swinhoei, p. 318. 



10, Ci/clotus minutus, p. 318. 



11, \{a. Alyemus (Dion/x) swinhoei, p. 318. 



12, 12a. Pupinella (Pupinopsis) swinhoei, p. 318. 



13, Limncea swinhoei, p. 319. 



14, 14«. Segmentina swinhoei, p. 319. 



