318 MR H. ADAMS ON NEW FORMOSAN SHELLS. [May 22, 



This species appears to be the type of a new group, possessing a 

 strong sinus at the insertion of the outer lip, the aperture being 

 edentulous. It may be designated Elma. 



9. Cyclotus swinhoei, H. Ad. (PI. XXXIII. fig. 9.) 



C. testa umbilicata, subdiscoidea, tenuiuscula, irregulariter striatula 

 et elevatim spiraliter Virata, fulvida ; spira parum elevata, apice 

 acuminata, purpurea, sutura profunda ; anfr. 4%, convexis, ultimo 

 rotundato, desccndente ; umbilico conico, pro/undo; apertura ob- 

 liqua, subcirculari, superne leviter angulata ; perist. simplici, 

 continuo, expansiusculo, ad anfractum penultimum breviier adhce- 

 rente. 



Diam. maj. 11, min. 9, alt. 7 mill. 



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



10. Cyclotus minuttjs, H. Ad. (PI. XXXIII. fig. 10.) 



C. testa umbilicata, depressa, tenuiuscula, minutissime striata, luteo- 

 fulva, nitidula ; spira parum elevata, apice acuta, fusco-cornea ; 

 anfr. 4, convexis, ultimo cylindrico , parum descendente ; apertura 

 subverticali, circulari; perist. simplici, recto, continuo, breviter 

 adnato. 



Diam. maj. 7, min. 6, alt. 4 mill. 



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



" This species appears to grow larger further south." — Sivinhoe. 



11. Alyc^eus (Dioryx) swinhoei, H. Ad. (PI. XXXIII. 



figs. 11, 11a.) 



A. testa anguste umbilicata, globoso-turbinaf a, tenuiuscula, dense ob- 

 lique tenuissime striata ; pallide fulva ; spira turbinata, apice 

 acutiuscula, sutura profunda; anfr. 4±, convexis, ultimo ventri- 

 coso, ad aperturam valde constricto, c strictura canalem elongatam 

 in sutura retrocedentem emittente ; apertura verticali, spira bre- 

 viore, circulari; perist. continuo, vix adnato, undique expanse 



Diam. maj. 6|, min. 5, alt. 6| m ^- 



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



12. Pupinella(Pupinopsis) swinhoei, H. Ad. (PI. XXXIII. 



figs. 12, 12 a.) 



P. testa perforata, pupaformi, solida, sub lent e subtilissime striata 

 et lirulis spiralibus distantibus sculpta, fulvo-cornea ; spira con- 

 vexo-conica, apice acutiuscula, sutura simplici, conspicua ; anfr. 

 1 , summis convexiusculis, sequentibus planioribus, ultimo infra 

 medium sulcato, circa perforationem valde cristato ; apertura sub- 

 verticali, circulari, I totius longitudinis tcquante, callo parietali 

 prominente, arcuato ; columella profunde incisa ; perist. incras- 

 sato, expanso, reflexo, albo, margine externo sulco superficiali 

 circulatim bipartito, superne subito attenuato, cum callo juncto. 



Long. 14, diam. 5| mill. 



Hab. Tamsui, Formosa (Mas. Brit.). 



This species is allied to P. mindorensis, humilis, &c, included by 



