60 LAURIA. 



Lauria fanalensis pyramidula (P. & S.). PI. 7, figs. 11, 12. 



The form named pyramidula P. & S. is more robust and 

 darker colored than typical fanalensis. One of the original 

 lot (fig. 11) measures: 2.7x1.6 mm., 514 whorls. The orig- 

 inal description follows. 



Pupa pyramidula Ponsonby & Sykes. Shell small, conic, 

 unicolored brown, thin; whorls 5%, rather swollen, longitu- 

 dinally very lightly striate, the last inflated, large ; spire ob- 

 tuse, rather flattened, the apex minute; aperture semioval, 

 provided with a thin, oblique, entering plait at the insertion 

 of the right margin ; margins remote, narrowly reflected 

 throughout; umbilicus moderate, funnel-shaped. Length 3.5, 

 width 1.5 mm. Icod, Island of Teneriffe. 



Ethiopian Species. 



As a whole, these forms are remarkably similar to those of 

 Europe. The Abyssinian species, bruguierei, differs but little, 

 in the adult stage, from some forms of L. cylindracea anccmo- 

 stoma and the scarcely separable dohrni of the Cape Verdes. 



The single Mascarene species known, L. bourbonensis, 

 stands a little apart by the very thin anterior end of the an- 

 gular lamella, which is more removed from the lip-insertion 

 than in the Cape species. The Cape of Good Hope species 

 are not far from the same type, though certainly distinct 

 specifically. They form an intimately related group, separ- 

 able by the following characters : 



a 1 . Angular lamella long, curving into the interior, its outer 

 end not quite connected with the lip-insertion. 

 b 1 . Base subangular; length 3.4 to 4.24 mm. 



L. farquhari, no. 11. 

 b 2 . Base narrowly rounded ; length 3 to 3.5 mm. 



c 1 . Radial basal laminas strongly developed in the 

 early stage, persisting weakly nearly to ma- 

 turity. L. cryptoplax, no. 13. 

 c 2 . Basal laminae very small, present only in 

 earlier youth. L. dadion, no. 12. 

 a 2 . Angular lamella short, its outer end connected with the 

 lip-insertion ; base pinched out into a short, blunt keel. 



L. taiularis, no. 14. 



