BOETTGEE : ON NEW AFRICAN LAND SHELLS. 351 



7. AcHATiNA KiLiM^, Daiitz., var. Rollki, n.var. PI. XVI, Fig. 1. 



Differt a typo colore et pictura. Testa flava, flainraulis nigro- 

 brunneis ornata ; flammulse in medio anfractuum interdura zigzag- 

 formes, confluentesque. Anfractus superiores subtiliter rosaceae. 

 Testa indistincte granulata, subnitens, solida. Long. 88, diam. 43 mm. ; 

 apertura, alt. 47 '5, lat. 25-5 mm. 



Hab. — Bulwa, TJsambara, German East Africa. 



This new variety differs from the typical Achatina Kilimce. in colour 

 and painting. The shell is straw-yellow, ornamented with blackish 

 chestnut stripes, which in the median zone of the whorls sometimes 

 become zigzag, flammulate, and confluent. The u])per whorls are 

 pale roseate, but are never so intensely coloured as in A. Zanzibarica, 

 Bourg., and its allies. The granulation of the shell is not so distinct 

 as in that species, and the shell has more lustre and is heavier. 

 I have also a specimen before me which is rather more elongated, 

 but does not justify a new sub-specific name. This pretty Achatina 

 is named in honour of Mr. H. Rolle, from whom I received it. 



8. Achatina Zanzibarica, Bourg., var. Naegelei, n.var. 

 PI. XVI, Fig. 4. 



Differt a typo figura minore et graciliore et anfractibus rapidius 

 accrescentibus ; testa flava, flammulis brunneis ornata. Long. 78, 

 diam. 38 mm. ; apertura, alt. 39, lat. 20 mm. 



Rah. — Kwiro, post-ofiice Mahonge, German East Africa. 



This variety difl'ers from the type in being smaller and more 

 slender, even than var. Lhotellerii, Bourg. ; the whorls increase 

 more rapidly than in the type. Tlie shell is straw-yellow, 

 ornamented with chestnut stripes. The shape of the new form is 

 quite different from that of the type of A. Zanziharica, Bourg., and 

 nobody, seeing only these two forms, would suppose that they belonged 

 to the same species. The variety Lhotellerii, Bourg., however, is 

 intermediate between them. We now see that A. Zanzibarica is 

 a species, the shape of which varies from tumid ovate to slender ovate. 

 All forms clearly show that they belong to one species by their upper 

 whorls being intensely roseate, by being not very heavy, and by other 

 features mentioned in Bourguignat's diagnosis (^Description de diverses 

 especes terrestres et fluviatiles de dijferents genres de mollusqzies de 

 P Egypte, de V Abyssinie, de Zanzibar, du Senegal, et du centre de 

 V Afrique, Paris, 1879, pp. 5-6). A. Usambarensis, Rolle (Nachrichts- 

 blatt der Deutschen Malakozoologischen Geselischaft, 1895, p. 100) 

 is a synonym of A. Zanzibarica. I figure (PI. XVI, Fig. 2) 

 a typical specimen of A. Zanzibarica (a cotype of A. Usambarensis 

 preserved in the Senckenberg Museum), also (PL XVI, Fig. 3) 

 a specimen of var. Lhotellerii, neither of which has ever been figured, 

 ami the type of var. Naegelei, showing the considerable variation in 

 form which occurs in this very variable species. The new variety 

 (var. Naegelei) was received from Mr. G. Naegele, with whose name 

 I have associated it. 



