140 Annals of the South African Museum. 



256. TRACHYCYSTIS METALLAKTEB, sp. nov., pi. 2, f. 6. [S.A.M.] 



Shell small, depressed globose, urabilicate, thin, fulvo-corneous, 

 semitransparent. Spire little raised, apex rounded. Whorls 4, 

 convex, gradually increasing ; beautifully sculptured above on the 

 second, third, and part of the fourth with delicate, curved, rather 

 distant, transverse lirae, which are clear, but less pronounced, on the 

 underside ; towards the aperture the striation becomes closer and 

 fainter. Suture deep. Aperture sub-ovate, descending slightly; 

 peristome thin, simple. Umbilicus not very wide, but deep, extend- 

 ing to the apex. Columella weak, margin slightly reflexed, but in 

 no way concealing the umbilicus. 



Diam. maj. 4'0, rnin. 3'4 ; alt. 2-2; apert. alt. 1-9, lat. T5 mm. 



Type in British Museum. 



Hob. CAPE OF GOOD HOPE. Caledon (Connolly). 



As with the far smaller hottentota, M. & P., the distant lirae, which 

 are such a beautiful feature in immature shells, wear off with in- 

 creasing age, and do not seem to be produced after the first 

 3J whorls. I have chosen the type carefully, as being in a tran- 

 sitional stage, for specimens of exceptional size possessing 5 whorls 

 show hardly a trace of the early sculpture, and might well be 

 mistaken for a different species. 



257. TRACHYCYSTIS MICROSCOPICA (Krauss). 



1848 Helix microscopica, Krs., Svidafr. Moll. p. 76. pi. 4, f. 20. D.F. 



,, Pfr., Zeitschr. f. Malak. v. p. 93. D. 

 1853 ,, Mon. Hel. iii. p. 83. D. 



1887 Helix (Pella) microscopica, Krs., Try on, Man. of Conch, iii. 

 p. 106. pi. 20, f. 77, 78. D.F. 



Type in Stockholm Museum. 



Hab. NATAL. Mooi Eiver (Wahlberg). 



Through the courtesy of Dr. S. Theele, of Stockholm, I am enabled 

 to give, on p. 159, a photograph of this little-known species. It 

 will be seen that it can hardly be placed in Pupisoma, but its exact 

 generic position is extremely doubtful. 



258. TRACHYCYSTIS MICROSTRIATA, Preston. 



1912 Trachycystis microstriata, Prest., Proc. Mai. Soc. x. p. 18. D.F. 

 Type in coll. Dautzenberg. 

 Hab. CAPE OF GOQD HOPE. Knysna (Cox). 



