136 On Mollusca from South Africa. 



obtuso, cseteris multum ad suturas impressis, tiimidulis, irregu- 

 lariter sed arete liratis ; apertura ovata, peristomate tenui. 

 Alt. 1-53, diam. 2-65 mm. 



Bah. Alexandra Park, Maritzburg, Natal, November 1906 

 [H. C. Burnup). 



A small species, with uniform corneous epidermis with 

 decidedly ruddy tinge, closely longitudinally Urate, the Mxm 

 somewhat irregular. Allied to T. ordinaria (described iu 

 this paper), T. iiricostata, laticostata, &c., and also possessing 

 some affinity to T. paula, M. & P., described in January 

 1907 *, from Johannesburg. From all of these, however, it 

 can be differentiated very easily. 



EXPLANATION OF THE PLATES. 



Plate VII. 



Fiff. 1. Ennea darglensis. 



Fiy. 2. kosiensis. 



Fig. 3. vitreola. 



Fig. 4. Helicarion vitalis. 



Fi(js. o, o a, 5 b. Kaliella euconuloides. 



Fig. 6. Afrodonta bilamellaris. 



Figs. 7,1 a, 7 b. Afrodonta trilamellaris. 



Figs. 8, 8 a, 8 b. Trachycystis ordinaria. 



Figs. 9, 9 a, 9 b. rutilans. 



Plate VIII. 

 Peltatus Jmdsonice (Bens.). 



Fig. 1. Shell. X 1-4. 



Fig. 1 (I. Genitalia. X 37. 



Fig. 1 b. The kale-sac, with spermatophore forming within it. x 11. 



Fig. 1 c. Spinules, immature 1" x 53. 



Fig. 1 d. Teeth of the radula. X 340. 



Fig. 1 e. Jaw. X 84. 



alg, albumen-gland, position of; ep, epiphallus ; crp, caeeum of 

 the retraetor penis ; k, kale-sac ; ov, oviduct ; p, penis ; rmp, re- 

 tractor muscle of penis ; sp, spermatheca ; vd, vas deferens. 



Afrodonta bilamellaris^ M. & P. 



Fig. 2. Shell, xl-7 ; basal side, xlO. 



Fig. 2 a. Shell from above with animal, drawn before it was broken to 



extract its radula. 

 Mg. 2 b. Teeth of the radula. X about 1000. 

 Fiff. 2 c. Jaw. X 167. 



* Ann. & Mag. Nat. Hist. ser. 7, vol. xix. (1007) p. 99, pi. vi. 

 fiff. 11. 



