46 RECORDS OF THE AUSTRALIAN MUSEUM. 



through the coil of the penis the tentacle is retracted. Between 

 the lower end of the uterus and the entrance of the spermatheca 

 duct a bulb occurs like the swelling in a similar situation of 

 certain Trochomorpha. The jaw (Fig. 14) is crescentic, with a 

 median projection, and is closely transversely striated. The 

 radula is formed like that of E. coma, Gray, as figured by 

 Pilsbry,* it consists of one hundred and thirty rows of 13:8:1:8:13. 



A near ally of this very distinct species is E. coma, Gray, of 

 New Zealand, from which the Lord Howe Island form is separable 

 by its concave spire, closer ribbing, and larger size. E. jnnicola, 

 PfeifFer, from New Caledonia is also allied, but that has an elevated 

 spire, weaker ribs, and is larger. This trio of kindred Endodonta 

 supports a trio of equally related Placostyli,^ viz., P. bovinus, P. 

 bivaricosus, and P. caledonicus, in linking together the faunas of 

 these islands. 



This species is that recorded in my article on "The Land and 

 Fresh-water Shells of Lord Howe Island, "J as Charopa textrix, 

 Pfr., this being the identification of Mr. J. Brazier in the Memoir 

 on Lord Howe Island. My suspicion of this determination was 

 aroused by comparing the shell with the excellent figures of 

 PfeifFer, § but I was over- ruled by the weight of Mr. Brazier's 

 authority. 



Under the name of C. textrix this shell has been widely dis- 

 tributed. One of the recipients, Mr. John Ponsonby, of London, 

 on comparing this with authentic C. textrix in the British Museum 

 found it to be a different species. Not only am I indebted to him 

 for this information, but he has also generously waived in my 

 favour his right of describing it. 



Now arises naturally the question what C. textrix really is. I 

 am tempted to believe it identical with the small form of Endo- 

 donta costuli/era, Pfr. My reasons are, that a shell from Noumea 

 which I identify as such closely corresponds with Pfeiffer's account 

 of textrix, that Macgillivray collected costulifera as well as textrix, 

 and finally that textrix is unknown from Lord Howe Island 

 which has been thoroughly searched for it. If this be so, then 

 the name Endodonta textrix must pass into synonomy. 



The novelty is dedicated to Mrs. J.'G. Waterhouse, an enthu- 

 siastic and accomplished conchologist of Sydney, whose assistance 

 in studying this and other forms I gratefully acknowledge. 



* Tryon & Pilsbry— Manual Conchology (2) ix., pi. ix., f. 23. 

 t Etheridp'e : " A much thickened variety of Bulimus bivaricosus from 

 Lord Howe Island."— Eec. Aust. Mus. i., 1891, p. 130. 

 X Eec. Aust. Mus., i., 1891, p. 137. 

 § Conchylien Cabinet (2) Helicea, pi. clxii., ff. 14-17. 



