the South- African Species and Varieties o/Pupa. 71 



give special attention to the genus. This he at once promised 

 to do, and to him alone belongs the full credit of the survey 

 now instituted. lie has, witii most infinite pains and patience, 

 succeeded, firstly, in unravelling the majority of the difficulties 

 arising from insufficient delineation or description, and, 

 secondly, in weighing each form separately in the balance 

 and judging as to its specific or varietal value. 



It is not surprising that, in tiie careful examination of 

 hundreds of specimens, collected from widely distant localities, 

 his observations should have led him to take a broader view 

 than had heretofore been possible, enabling him to correct 

 many erroneous conclusions. He has now entrusted to us 

 his valuable notes and drawings with full permission to use 

 tiiem. Indeed, without his aid this revision could not 

 possibly have been attempted, and well has he merited, not 

 our own thanks only, but the gratitude of every student of 

 the South-African moUuscan fauna. 



1. Pupa crawfordiana (M. & P.). 



Fauxulus crawfordicmus, Melvill & Ponsonby, Ann. & Mag. Nat. Hist, 

 ser. 7, vol. xii. (1903) p. 605, pi. xxxi. fig. 5. 



A fine species, allied to P. layardi^ Bens., with a cylindric- 

 fusiforni contour, attenuate towards the apex. It was de- 

 scribed as a dextral Fauxulus, but seems better included in 

 Pupa proper. 



Alt. 8, lat. 3-75 mm. 



Ilab. Mossel Bay (/. Crawford). 



2. Pu2)a cryptoplax, M. & P. (PI. I. figs. 1, 2.) 



Pupa cryptoplax, Melvill & Ponsonbv, Ann. & Mag. Nat. Hist. ser. 7, 

 vol. iv. (1899) p. 198, pi. iii. tigs. 11, 11 a. 



"VVe give two of Mr. Burnup's drawings, taken from a 

 juvenile and mature specimen respectively, and in these will 

 be seeir : — 



(a) the deep-seated and much inwardly extending parietal 

 plait, with 



(i) a plait, occasionally duplicated, encircling the colu- 

 mella, and 



(c) a broad, apparently transverse, labial plica ; while 



[d) there exists on the young shell an evident septum. 

 We quote Mr. Burnup's remarks in lift., as follow : — 



*' Observing some strange-looking plaits or septa in some 

 young shells, 1 made an internal examination, to see how far 

 in the growth these were continued. Two [)laits are shown 



