BOETTGER AND HAAS : ON AFRICAN NON-MARINE SHELLS. 357 



basali aiigulum formans. Long. 57 'r), diam. 18 mm. ; apertura, 

 alt. 20-5, lat. 8-5 mm. 



Rab.—Kuh.i, Bahr el Abiad (leg. Otto le lloi, February 20, 1910; 

 Museum Al. Koenig). 



Shell rimate, very long and slender, corneous white, ornamented 

 with fine chestnut stripes, especially above the suture; apex white; 

 wliorls 9, very moderately convex, regularly increasing in size, 

 separated by an almost flat suture ; the last whorl somewhat convex, 

 measuring about one-third of the length of the shell ; apei'ture white, 

 displaying the external striping, narrow; peristome simple, acute; 

 the margin of the white columella widely reflexed, forming an angle 

 with the basal margin. 



This species is most nearly related to Litnicolaria lonr/a, Pils. (Man. 

 Couch., ser. ir, vol. xvi, p. 284, pi. xxxii, figs. 18, 19). Like 

 that species it belongs to the group of L. flamniata (Caill.). From 

 L. longa it is distinguished by being smaller and more delicate. 

 The unique type-specimen was collected at Kaka, l^ahr el Abiad 

 (February 27, 1910). We have named the species in honour of 

 Professor Dr. Al. Koenig, to whose scientific energy the whole 

 expedition was due. 



LiMICOLARIA CANDIDISSIMA, Shuttl. 



We have before us four specimens of this rare Limicolaria., which 

 is found especiallj- in Kordofan. Thei'e are three from the Bahr el 

 (ihazal (February 27, March 2, and March 1, 1910, the last near 

 the mouth of the Bahr el Arab), and one from Abu Doleb, Bahr el 

 Abiad (March 30, 1910). Only the specimen from Abu Doleb was 

 obtained with animal. The four .'shells have no markings at all. 

 The one from Ahu Doleb has a ])ale corneous epidermis, darker than 

 in L. jiammata. It is uniformly coloured, except the columella, 

 which is dull purplish. L. candidissima is certainly specifically 

 distinct from L. flammala, though it belongs to the same group as 

 that shell. 



LiMICOLAKIA lloHLFSr, Kob. 



The well-marked Limicolaria, Rohlfsi, Kob., was described by 

 Kobelt at the request of E. von Martens (Kobelt, J>ie Genera 

 Livinliacia, Pseiulachatiua, Perideris, Limicolaria, und LTomorus, in 

 Martini und Chemnitz : Syst. Conch. Cab., 1895, p. 72, pi. xxiii, 

 figs. 5-6; Martens, Beschalle Weichtiere Beutsch- Ost - Afrikas, 

 Berlin, 1897, p. 107, pi. v, fig. 36). The type (leg. G. Bohlfs) came 

 from the Ngadda River (north-west of the junction of the Benue and 

 the liiger). Some more specimens were obtained by <). Neumann 

 (February, 1894) at Mhugu, north-east side of the Victoria Nyanza, 

 south of Ngowe Bay, and at Kaviroudo, and by Stuhlmann in the grassy 

 steppe in Vitshuinbi, at the soutli-west end of Albert Edward Nyanza 

 (May, 1891), and in a banana plantation in Buginda at Chef Oransi, 

 district of Andetei, west of the Semliki-Issango (December 18, 1891). 

 This species is easily recognized by its peculiar coloration. It is 

 furnished with a row of dark-brown spots close below the suture and 

 a broad dark-brown baiul around the umbilicus, while the space 



