266 JOURNAL OF CONCHOLOGY, VOL. l6, NO. 8, JANUARY, I922. 



found one or two dead shells round the roots of palms in the course 

 of three years' experience." 



In this connection it will be remembered that certain habitats in 

 Britain are not favoured by molluscs, e.g., heather and bracken — 

 also pine woods in which the ground is often bare and covered with 

 fallen needles. 



The following species were collected along with a few more which 

 owing to condition or juvenility it is impossible to identify : 

 Leverville. 



Limicolaria laeta Thiele, sub. sp. medjensis, Pils. "On 



sandy grass plain." Epiphragm pearly with knife-like slit in upper 

 angle. 



Limicolaria distincta Putzeys. " In considerable numbers 

 after rain, crawling on sandy paths and in elephant grass." 



Subulina thysvillensis Pils. " Amongst soil in leaf bases ot 

 oil palms." 



Aetheria elliptica Lam. " The common fresh water edible 

 ' oyster,' occurring in beds, especially on the northern bend of 

 R. Congo from Lisala to Basoko. In many parts the shells are 

 collected and burnt for lime for building purposes." Several fine 

 examples (from R. Kwilu) with well developed tubular spines, 

 showing the aptness of Sowerby's name hibifera applied to this 

 species, but now relegated to synonymy. 

 Tango. 



Limicolaria distincta Putzeys. In grass by road side. 



BOTEKE. 



Homorus (Subulona) ischnus Pils. 



Subulina angustior (Dohrn). 



Pseudoglessula (Kempioconcha) leopoldvillensis Pils. 



Pseudoglessula (Ischnoglessula) subfuscidula Pils. A 

 beautiful dark little species with whitish columella margin. 



Ourvella ovata Putzeys. 



Ptychotrema (Parennea) aequatoriale Pils. Under dead 

 wood in damp undergrowth. 



Gulella laevigata (Dohrn). 



Mesafricarion (Belonarion) putzeysi Pils. One fragment- 

 ary example which I cannot definitely determine but which agrees 

 with description — especially as to colour and the white, glittering 

 first whorl. 



All except P. cequatoriale " ni moist damp wood in high forest." 



