400 . Zoological Society. 



The following " Descriptions of some new species of Helicina, in 

 the collection of H. Cuming, Esq.," by Mr. G. B. Sowerby, jun., 

 was read : — 



Helicina striatula, Thesaurus Conchy liorum, by G. B. Sowerby, 

 jun., fig. 43. Hel. testa subdepressd, concentrice substriatd, fulvo- 

 rufescente ; aperturd subquadratd, margine albo, crasso, reflexo, 

 integro, subsinuato, postice subdepresso. 



Alt. -23 ; lat. '30 poll. 



Hab. ? Mus. Cuming. 



The margin of the aperture in this species is slightly lobed, and 

 sinuous above and below. 



Helicina maxima, Sow. jun., Thes. Conch, fig. 11. Hel. test / 

 globosd, subdepressd, laevi, alba ; aperturd magnd, semilunari, 

 margine reflexo, acuto ; labio interno crassiusculo ; columella ob- 

 tuse angulatd. 



Alt. -50 ; lat. 1 poll. 



Hab. ? Mus. H. Cuming. 



Rather more depressed and larger than H. Major, with the base 

 of the columella angulated instead of being notched. 



Helicina acutissima, Sow. jun., Thes. Conch, fig. 92 to 95. 



Hel. testa plus minusve depressd, concentrice leviter striatd, an- 



gulari, acutissime carinatd, infra angulos paululum complanatd; 



aperturd triangulari ; labio interno tenuissimo ; columelld subcom- 



planatd, ad basim subundatd ; labio externo acuto, valide reflexo, 



expanso, super angulum subdepresso. 

 Hab. apud ins. Philippinas. H. Cuming legit. 

 Var. a. T. luted, rufescente, fascid rubra infra angulo positd. Alt. 



•35 ; lat. *70. Hab. Jacna, ins. Bohol. 

 Var. b. T. luted, rufescente, fasciis rubris tribus ornatd. Hab. Jacna, 



ins. Bohol. 

 Var. c. T. pallide luted, fascid rubra infra angulum, et altera prope 



suturam positd. Alt. *25 ; lat. '40 poll. Hab. Siquijor. 

 Var. d. T. pallide luted. Hab. Argao, ins. Zebu. 

 Var. e. T. luted, subtus rubrd ; carina albd. Hab. Argao, ins. Zebu. 

 Var./. T. fused, nigricante. Hab. Loboc, ins. Bohol. 

 Var. g. T. rubrd, absque fasciis. Hab. Loboc, ins. Bohol. 

 The above are found on leaves of small shrubs. 



Helicina Trochiformis, Sow. jun., Thes. Conch, f. 90. Hel. 

 testa luted, Helicinse acutissimse simillimd, sed spird altiori ; labio 

 externo postice subdepresso. 

 Alt. -20; lat. -30. 



Hab. Ins. Negros, Philippinarum. H. Cuming legit. 

 Found on leaves of palms on mountains. It differs from H. acu- 

 tissima principally in being much more conical, and in having the 

 upper part of the outer lip more depressed. 



Helicina minuta, Sow. jun., Thes. Conch, f. 40, 41. Hel. 

 testd parvd, depressd, subangulatd, rubrd vel stramined ; margine 



