1899.] FROM BRITISH CBNTEAL AFBIOA. 687 



longit. tolius y cequans ; peristoma tenue, simplex, margine 

 columellari rejlexo, umbilicam mediocrem partim ohtegente. 

 Longit. 21 millim., cliam. 15 ; apertura 12 Jonga, 7 lata. 

 Hah. Nyika Plateau, 7000 feet, Mount Chiradzulu and Zomba 

 Plateau, 5000 feet. 



Remarkable on account of the spirally lirate protoconch, the 

 difference of sculpture of the normal whorls being sharply defined. 



29. Btjliminus (Conulinus) mbtuloides, sp. nov. (Plate 

 XXXIII. fig. 43.) 



Testa conica, anguste umbilicata, tenuis, pallide fusco-cornea, nitida, 

 oblique tenuiter striata, ad apicem obtusa ; anfractus 6-7, 

 rotundati, regulariter accrescentes, sutura leviter ohliqua sejuncti ; 

 apertura fere perpendicularis ; peristoma tenue, simplex, mar- 

 gine columellari expanso et rejlexo, umbilicum semiobtegente. 

 Longit. 10 millim., diam. 6. 

 Rab. Zomba Plateau, 5000 feet. 



Closely allied to B. metula Martens \ but, although larger, 

 consisting of fewer whorls. Professor v. Martens writes concerning 

 specimens sent for his examination : — " Very near to my metula, 

 but a little broader and lower than all my specimens. Also the 

 umbilicus is a little broader in my examples." 



30. BuLiMiNUS BoiviNi (Morelet). 



Olandina boivini, Morelet, Series Conch, p. 72, pi. v. fig. 5. 



Bulimus {Qerastes) mamboiensis, Smith, Ann. Mag. Nat. Hist. 

 1890, vol. vi. p. 153, pi. v. fig. 7. 



Hah. Nyika Eange, 7000 ft.. Mount Chiradzulu, 6000-7000 ft., 

 Masuku Plateau, 6000-7000 ft., Malosa, 6000 ft,, Zomba Plateau, 

 5000 ft. 



This species is very variable in size and form judging from the 

 series of specimens from the above localities. It also has a wide 

 range, the type being found to the north at Mombasa. 



Dr. E. von Martens^ has erroneously placed the Bidiminus 

 ptycliaxis as a synonym of this species, which does not possess the 

 distinct columeilar fold which is characteristic of that form from 



The following measurements will show the great variation in size 

 which occurs in the present species : — 



Length. Width. Length of aperture, 



mm. mm. mm. 



(1) 25 10 9 



(2) 20 10 8 



(3) 14 7J 6 



Number 1 consists of 8| whorls, no. 2 of 7| whorls, and no. 3 

 of 6|, all appearing equally adult. 



1 Weichth. Deutsch-Ost-Afrikas, p. 66, pi, iii. fig. 27. 

 * Beschalte Weichth. Deatseh-Ost- Afrikas, p. 61. 



