GEOMITKA. 243 



G. tetrica Paiva., iv, 44. v. papilio Lwe., iv, 45. 



O. polyraorpha Lwe., iv, 44. calcigena Lwe., iv, 45. 



elegantula Jan. v. discina Lwe., iv, 45. 



saccharata Lwe. v. gomesiana Pva., iv, 4-5. 



tmniata Rv. v. attrita Lwe., iv, 46. 



v. salebrosa Lwe., iv, 44. G. cheiranthicola Lwe., iv, 46. 

 v. poromphala Lwe., iv, 44. v. mustelina Lwe., iv, 46. 



v. pittse Pva., iv, 44. G. tabellata Lwe., iv, 46. 



v. alleniana Pva., iv, 45. G. testudinalis Lwe., iv, 46. 

 v. lincta Lwe., iv, 45. bulveriana var., Rv. 



v. arenicola Lwe., iv, 45. G. lyelliana Lwe., iv, 41. 



cinerea Lwe., iv, 45. G. albersi Lwe., iv, 42. 



v. barbosse Pva., iv, 45. G. bulverii Wood, iv, 42. 

 v. pulvinata Lwe., iv, 45. bulveriana Lwe. 



(Umbilicate, lenticular, with a compressed and deflexed keel ; 

 base coarsely granose ; texture chalky ; white). 



G. tectiformis Sowb., iv, 42. . var. ludovici Alb., iv, 42. 



Section Disculella Pils., 1894. 



Ochthephila BECK, Index Moll., p. 17. A LEERS-MARTENS, Die 

 Hel., p. 118, type H. maderensis. Not Ochthiphila Fallen, 1823 

 {Diptera'). Placentula LOWE, Ann. Mag., Nat. Hist. (2),ix, p. 118, 

 Feb., 1862 ; P. Z. S., 1854, p, 194, type H. maderensis. Not Pla- 

 centula Lam., 1822. 



Shell discoidal, umbilicate, with convex base and spire, the periph- 

 ery keeled ; solid, brown or whitish banded and maculated with 

 brown. Surface striate above, smoother below. Whorls about 6, 

 the last deflexed ; aperture circular, oblique, the lip slightly ex- 

 panded, narrowly white lipped within. Type G. maderensis, pi. 

 68, figs. 10, 11. 



Distribution, Madeira Is. Distinguished from the very closely 

 allied section Discula by the smoother, hardly granulate surface, 

 and the rounder mouth. 



G. compar Lwe., iv, 37. G. leptosticta Lwe., iv, 37. 



G. tseniata W. & B., iv, 37. G. micromphala Lwe., iv, 37. 



G. maderensis Wood, iv, 37. G. dealbata Lwe., iv, 38. 



cyclostoma Mke. G. fictilis Lwe., iv, 38. 

 G. spirorbis Lwe., iv, 41. 



