IREDALE : LAND MOLLUSCA OF THE KKRMADEC ISLANDS. .379 



Genus Charopa, Albers. 

 Charopa, Albers, Die Heliceen, 2nd ed., 1860, p. 87. 

 T3-pe (by original designation), Helix coma, Gray. 

 (Not Charopus, Erichson, Entomogr. 1840, p. 119.) 

 This genus name provided for the toothless 'Endodout' Helix 

 coma, Gray, has been used to cover many different styles of toothless 

 ' Endodonta '. It seems certain that instead of lumping, if splitting 

 were indulged in we should have a better chance of gauging the 

 immediate relationships of the species described. It would be easj^ 

 to form sections of Piychodon where teeth in varying numbers and 

 shapes are present, but it is not so easy in Charopa, yet my Charopoid 

 forms arc certainly of diverse origin. I am of the opinion that my 

 tree-living Charopa has a caudal mucous gland, and its shell characters 

 certainly differ from those of the ground species. As noted previously, 

 Pilsbry has recently advocated the splitting of the genus Endodonta, 

 though it was due to his influence that these well-marked genera 

 were merged into Endodonta. Australasian workers have not yet 

 accepted his retraction, and most recently described species of 

 Charopa have been placed in Endodonta. 



Charopa Macgillivrayana, n.sp. PI. XVIII, Fig. 6. 



Shell sub-discoidal, whorls regularly coiled, spire not sunken, last 

 whorl scarcely descending, widely umbilicate. Colour cream. Whorls 

 3A ; first whorl and a half, constituting the protoconch, smooth ; adult 

 sculpture consisting of straight, evenly spaced, erect lamella3, about 

 sixty on the first adult whorl and 80 to 90 on the next, becoming 

 uneven and more widely spaced towards completion of whorl ; 

 interstices with, minor threads. Aperture regularly lunate, outer 

 lip thin, sharp. Mouth unarmed. Umbilicus deep, about one-fourth 

 the diameter of the shell, exposing all the previous whorls. Diam. 

 max. 2, min. r75 mm. ; alt. 1 mm. 



Hal. — Sunday Island, Kermadec Group. Living under stones, 

 rotten logs, etc., on high land only. 



Chaeopa (Discochaeopa, n.subgen.) exquisita, n.sp. PI. XVIII, 



Fig. 8. 



Shell minute, discoidal, thin, spire slightlj'' sunken, widely 

 umbilicate. Colour cream. Whorls 3, well rounded, last whorl 

 scarcely descending. Sculpture : apical quarter whorl unsculptured ; 

 the remainder of the first whorl sculi)tured with very fine radial 

 lamellae, 40 in number ; succeeding whorl with straight, even-spaced 

 very closely set radial lamellae, about 100 in number, increasing on 

 last whorl to about 120, only due to rather wider spacing. Aperture 

 lunate, lip thin, mouth unarmed. Umbilicus deep and very wide, 

 exposing all previous -^^horls and more than one-half the breadth of 

 the shell. Diam. max. 1-25, min. 1 mm. ; alt. 5 mm. 



Hob. — Sunday Island, Kermadec Group. Living under rotten 

 wood, stones, etc. 



Mr. J. H. Ponsonby has generously allowed me to examine his fine 

 collection of Australian Endodouts, and among them I noted a series 



VOL. X. — SEPTEMBER, 1913. 26 



