350 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



aperture. This new species and the var. gracilis are due to the zeal 

 of Mr. G. Naegele. 



5. GoNAXis HELicoiDEs, n.sp. PL XV, Figs. 10-12. 



Testa perforata, subsolida, luride lactea, supra anguste costulato- 

 striata, infra laevis, nitens. Anfractus 7, convexiusculi, sutura plana 

 separati ; ultimus celeriter accrescens, antice uon descendeus, supra 

 sulco superficiale impressus. Apertura ovata, obliqua, margine 

 superiore in lobum producto ; peristoma moderate incrassatuin, 

 subreflexum, marginibus callo tenuissimo junctis. Alt. 10 mm.; 

 diam. maj. 14'5, min. 12 mm.; apertura, alt. 8, lat. 7 mm. 



Hah. — Kipatimu, German East Africa. 



Shell perforate, not very thick, but solid, dirty milky white, 

 closely costulately striated on the upper sides, smooth and shining 

 below. Whorls 7, moderately convex, separated by a flat suture ; 

 the last whorl rapidly increasing in size, not descending in front, 

 furnished on the upper side with a very low furrow. Aperture 

 ovate, oblique, its upper mai'gin produced ; peristome somewhat 

 thickened, moderately reflexed, the margins united by a very 

 thin callus. 



Mr. G. Naegele has kindly sent me this characteristic new Gonaxis. 



6. AcHATiNA Hessei, n.sp. PL XVII, Fig. 1. 



Testa imperforata, f usiforme ovata, brunnea ; anfractus superiores 

 flammulis brunneis indistinctis, iu anfractu ultimo evanescentibus, 

 ornati ; anfractus ultimus praecedentibus saturatius coloratus; apex 

 albescens. Superficies subnitens, granulis distinctissimis, sulcis 

 spiralibus longitudinalibusque valde incisis induta. Anfractus 8, 

 moderate convexi, regulariter accrescentes, sutura subplana separati ; 

 ultimus subconvexus, \ longitudinis totius sequans. Apertura ovata, 

 intus alba, colore externo translucente ; peristoma simplex, acutum ; 

 margo columellaris albescens, cum basuli angulum formaus. Long. 

 128, diam. 64 mm.; apertura, alt. 71, lat. 37 mm. 



Hah. — Yaunde, Southern Cameroons. 



Shell imperforate, fusiform-ovate, of a chestnut colour ; the upper 

 whorls painted with very indistinct darker chestnut stripes, which 

 disappear on the last whorl, which is somewhat darker-coloured than 

 the preceding; apex whitish. Surface nearly lustreless, furnislunl 

 with strong granules, produced by deeply-cut spiral and longitudinal 

 furrows. Whorls 8, very moderately convex, regularly increasing in 

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

 convex, measuring about one-half of the shell. Aperture ovate, 

 white within, displaying the external colour; peristome simple, 

 acute ; the margin of the whitish columella forming an angle with 

 the basal margin. 



This pretty Achatina is related to A. halteata, Rve., but is distinctly 

 separated from that s[)ecies by its very different sculpture, which 

 recalls the granulation of ^. reticulata, Pfr. A. JjT^ssei is named in 

 lionour of Mr. P. Hesse, from whom I received this new species. 



