324 PROCEEDINGS OF TQE MALACOLOGICAL SOCIETY. 



Jfal. — Biuldu, western shores of the Victoria Nyanza. 



This is one of the characteristic species of the Great Lake region of 

 Central Africa, and, ranging over a very wide area, is subject to 

 considi'rable nioditicatiou of form. These differences have been noted 

 by the hite jM. Eourguignat,^ who, in a manner characteristic of the 

 ' Kouvelle Ecole,' has created several so-called species, Avhich appear 

 to be but very slight variations. Moreover, he considers that the 

 three figures of this species given by Pfeilfer represent three different 

 forms, one of which he names Biirtoa PethcricJci, another he regards 

 as a form of a different genus {Burtopsis), and only figure 1 is allowed 

 to represent Pfeiffer's nilotica ! His genus Jiurtojjsis, in my opinion, 

 is also founded on forms of the present species, in which the peristome 

 is somewhat more thickened. 



The Limicolaria Bourguignaii of Grandidier is also probably closely 

 allied. It is described and figured in the Bull. Soc. Mai. France 

 1885, vol. ii, p. 157, pi. vii, fig. 1 ; and according to M. Bourguignat's 

 theory of reasoning, the shell figured must belong to a different species, 

 because it does not agree with the description. It is said to be 

 wliitish, with red subundulated flammules iiTegularly scattered, 

 whereas the figure depicts none of these, 



2. LlJIICOLAKIA VENTKICOSA, n.sp. 



Testa pyramidalis, ad apicem obtusa, imperforata, pallide camca, 

 strigis nigris vel saturate fuscis, plus minus undulatis, picta, lineis 

 incrementi tenuibus striisque paucis spiralibus sculpta ; spira ad 

 apicem valde obtusa; anfi-actus 7, perconvexi, infra suturam 

 obli()uam in anfr. duobus ultimis concave et leviter impress!, ultimus 

 brevis, subglobosus ; apertura inverse auriformis, lata, intus obscura, 

 longit totius f ada^quans ; peristoma tenue, margine dextro arcuato, 

 columellari rcctiusculo, reflexo, purpureo. Longit. 44, diam. 22 mm. ; 

 apertura 18 longa, ITS mm. lata. 



Hah.—kVo^iYt Edward ISTyanza, 3,000-4,000 feet. Remarkable for 

 the convexity of the whorls, the obtuse apex, and colour. The stripes 

 on the upper whorls are rich brown, but upon the body-whorl they 

 become almost black. They are wavy and narrow on the upper half 

 of the whorls, but widen out into broad blotches on the lower part. 



3. Limicolaria saturata, n.sp. 



Testa elongata, imperforata, saturate fnsca, strigis obliquis, plus 

 minus undulatis, picta; spira elongata, ad apicem pallida, submain- 

 ilUita ; anfiactus 8 convex!, sutura obliqua sejuncti, lineis incrementi 

 tenuibus obliquis striisque spiralibus levibus plus minus granulato- 

 cancellati ; apertura inverse auriforuiis, intus sordide caeruleo-albida, 

 longit. totius \ fere sequans ; columella subrecta, reflcxa, leviter 

 incrassata ; labrum arcuatum, tenue. Longit. 67, diam. 25 mm. ; 

 apertura 23 longa, 12 ram. lata. 



/irti.— Albert Edward Is^yanza, at 3,000-4,000 feet. 



Moll. Ai'iiiiue eqiuit., pp. 88-100. 



