276 HADRA. 



This is allied to H. quadrivolvis, v. Martens, which has a narrow 

 colored band and differs in form. I have named it after H. M. 

 frigate " Meander " which did much good service in Bornean waters 

 in the early days of Kajah Brookes occupation. 



C. PLENA Godwin-Austen. PI. 56, fig. 16. 



Shell depressedly globose, openly umbilicated ; umbilical margin 

 hollow, subangular; sculpture finely granulate, covered with a 

 strong epidermis ; color pale umber-brown, with a faint indication 

 of a peripheral band ; spire low ; apex flat, slightly raised above 

 the body -whorl ; suture shallow ; whorls nearly 5, gradually 

 increasing; aperture oval, nearly vertical ; peristome milky white, 

 reflected ; columellar margin suboblique. Size of specimen drawn, 

 maj. diam. 18'8, min. 15*5, alt. axis 8*5 mill. Largest specimen, 

 maj. diam. 19'0, min. 16'0 ; alt. axis 8'9 mill. (G.-A.) 



Labuan (Sir H. Low, in coll. Dr. Hungerford). 



Helix (Chloritis) plena G.-A., P. Z. S. 1891, p. 44, t. 2, f. 8. 

 There were five examples of this shell in the collection. 



Subgenus HADRA Alb. (Vol. VI, p. 125) 



The main feature distinguishing Hadra from Chloritis is that the 

 apex in the former is neither concave, notably flattened nor sculp- 

 tured by regularly arranged hair-points. 



This group seems to be more justly regarded as a subgenus of 

 Chloritis than as a separate genus. Hedley suggests to me that the 

 microscopic sculpturing of Hadra is a reminiscence of the hair- 

 granules of Chloritis. 



Section Hadra s. str. 



H. BIPARTITA Fer. 



Dr. Cox proposes to call the unicolored yellow form of this spe- 

 cies var. unicolor. 



Section Badistes Gould. 

 (Group of H. bitceniata, Vol. VI, p. 144.) 



H. BITCENIATA Cox. For figS. SC6 Vol. IX. 



A much more globose form of this species than that already 

 described is here figured. It has quite the contour of a Xanthome- 

 Ion. 



