380 PROCEEDINGS OF THK MALACOLOGICAL SOCIETY. 



bearing the data " Bassi, Brazier, 6 miles S. of Hobart. Under rocks 

 3 or 4 feet deep. Beddome". Under the microscope these were seen 

 to be, comparatively speaking, gigantic facsimiles of the shell above 

 described in form and sculpture, even to the apical characters. The 

 coincidence of habitat must certainly indicate relationship, and I note 

 that Suter (Ann. Mag. Nat. Hist., ser. vi, vol. xiii, ]). 64, 1894) refers 

 ' bassi ' to the section Gerontia of Flammulina. Such a location is 

 conchologically impossible, so that if Suter's shells were similar to 

 the ones I have examined the species cannot be correctly placed in 

 Char Of a. As the apical features differ from those of Charopa and are 

 constant in such distant localities as the Kermadecs and Bass's Straits, 

 I propose the new sub-generic name Discochaeopa with Charopa 

 exquisita as type. 



Chaeoi'a pseud anguicula, n.sp. PI. XVIII, Fig. 9. 



Shell discoidal, whorls loosely coiled, spire slightly elevated, last 

 half whorl somewhat descending, widely umbilicated. Colour buff, 

 regularly flammulate with rich red brown. Whorls 3^ ; first 

 whorl and a half unsculptured, including a bulbous first whorl 

 a little tilted ; the succeeding sculpture consists of very slender 

 straight distant lamellae, becoming more separate on last whorl ; the 

 interstices are finely threaded, and about fifty lamellae occur on the 

 first adult whorl. Aperture regularly lunate, lip thin, mouth un- 

 armed. Umbilicus wide, cavernous, exposing all previous whorls. 

 Diam. max. 1-9, min. 1-6 mm. ; alt. •9 mm. 



Hah. — Sunday Island, Kermadec Group. Living upon moss- 

 covered trunks of trees. 



Genus Pakalaoma, nov. gen. 



The first turbinate land shell I noted on Sunday Island was that 

 which I call Paralaoma Maotilensis. I was quite unable to generically 

 locate it, and provisionally called it " Charopa", but the shape and 

 sculpture seemed to effectually remove it from that genus. I knew 

 of no New Zealand shell which remotely suggested this, and I felt 

 convinced it should not be placed in Midodonta, sensu lata. Recently 

 Mr. J. H. Ponsonby loaned me a large number of Australian 

 Endodonts to look over, and almost at once I noted a shell from New 

 South Wales which was apparently congeneric. This was labelled 

 '' Morti". In the Mem. Nat. Mus. Melb., No. 4, p. 7, 1912, Cox 

 and Hedley place this species in Laoma and synonymize with it 

 a shell Tate called Flammulina retinodes. In the same place figures 

 are given (pi. ii, figs. 9-12) of Laoma mucoides, considered closely 

 related. This was a generic location that had never suggested itself 

 to me, and as my shells do not seem to have the least resemblance to 

 typical Laoma, 1 am proposing the above generic name. 



Laoma was thus introduced : In the Proc. Zool. Soc. Lond., 1849, 

 p. 167 (1850), Gray described a new species of shell from New 

 Zealand under the name '■' Bulhmis ? {Laoma) Leimonias", writing, 

 " I am inclined to regard this shell as the t)'pe of a particular sub- 

 genus of shell which may be characterized by the simple peristome, 



