38 F. Stoliczka — Land-shells of Penang Island. [No. 1, 



Plate III. 



Figs. 1. TracJda PenangensiSy n. sp., p. 24 ; three views in natural size. 



„ 2, Pupa \_Pwpisoma] orcella, n. sp., p. 33 ; 2, natural size, 2a, 2b, enlarged. 



„ 3. Pupa [^ScojpelopMla'] palmira, n. sp., p. 32 ; 3, natural size, and two 



views enlarged. 

 „ 4 — 6. Clausilia [^PhfBdusa'] Penangensis, n. sp., p, 27 ; 4, 4a, attenuated var. ; 



5, elongately fusiform var. ; 6, 6a, fusiform variety ; all figures in 



natural size. 

 „ 7 — 8. Clausilia \_P1uEdusa'] filicostata, n. sip.,Y>- 28; views of two different 



specimens in natural size. 

 „ 9 — 14. Philomicus pictus, n. sp., p. 30 ; 9, 9a, 96, three views taken from a 



specimen in spirit ; 10 and 11, two views of the same specimen in 



different states of expansion, taken from life ; all these figures are 



in natural size, but the other figures, representing the genital 



organs, the jaw and teeth, are enlarged. 

 „ 15 — 17. Clausilia Penangensis, vide p. 27. 

 „ 18—20, Trachia Penangensis, vide p. 24. 



Explanation of the letters used on pi. II and III. 



ho = hermaphrodite opening. 

 ut = uterus. 

 al z=z albuminous gland. 

 ^ vd z=i vas deferens. 



ag == amatorial gland. 

 p = penis, 

 m = retractile muscle. 

 rs = receptaculum seminis. 

 po = pulmonary opening. 

 an = inner, or posterior, angle of mouth. 

 pn = peripherical angle. 

 u = umbilicus. 

 rs = right shell-lobe. 

 t*w == „ neck lobe. 

 Is = left shell lobe. 

 In = left neck lobe. 

 The small letters below the teeth refer to the distance of each tooth from the 

 respective central tooth iu each series. 



