A RRVISION OF THE AUSTRALIAN TURRIDS HKDLEY. 273 



effuse exteriorly. Outer lip stroiif,'!}^ inflected. Aperture about a quarter 

 of the total heiglit. Sculpture: — Prominent rounded ribs, suddenly 

 swelling ou the peri[)Iiery, but not e.xtending to either base or suture. 

 The wliole shell, except the nucleus, is usually over-run by fijie, dense, 

 beaded threads. Colour white, langing through buff and brown to 

 chocolate, variously' disposed, but frequently with a dark patch on the 

 lip at the right insertion, and juiother near the c:inal. Fasciole not 

 differentiated by sculpture from the rest of the whorl. Type Maugilia 

 (Glyphostoma) alicice Melvill and Standen, 1895. 



This group has been included by most recent writers in Glyphostoma , 

 a genus whose history therefore acquires an interest in this connection. 

 Briefly it is sketched thus : 



Foi- a West Indian Turrid, G. deutifera, having an aperture toothed 

 almost as strongly as that of Cijpnea, Dr. W. M. Gabb*^^ proposed in 1872 

 a new genus, Glijphostoma. Soon afterwards Semper <36 re-grouped under 

 Glyphofstoiiia the following tropical Indo- Pacific species : — M. spnrca, cinerea, 

 Candida, and argiUacea Hinds ; M. roseutincta Montrouzier ; and M. obesa 

 Garrett. An Australian species in the form of G. paucimacnlaAa was 

 added by Angas.^^ Jn the hands of Bouge and Dautzenberg this genus 

 aggregated a considerable number of new New Caledonian species. A 

 revulsion then occurred, and Schepman and Melvill have lately transferred 

 several of these Indo- Pacific Glypkostovia to Lienardia. 



Hervier^s i^^d already noticed that several species grouping round 

 G. crassilabrum Reeve were distinguishable from the body of the genus as 

 he knew it. 



Dr. W. H. Dall with his usual kindness gave me, in addition to a 

 characteristic specimen, the benefit of his experience. With reference to 

 Gl ij2jhostom a he writes : — " It appears tome a good genus. The shell is 

 essentially like the shells Carpenter used to call Clathurella (not tlie genus 

 Defra)icia),hnt is lai'ger, and is especially characterised by the denticulate 

 calluses on the pillar lip and outer varix. It has no operculum. The 

 protoconch is sharply carinate, and the shell is invariably more or less 

 axially ribbed and with some spiral sculpture." 



Comparing an example of G. gahbi Dall witli the so-called Australian 

 Glyphostoma, I find that in each the protoconch is on the same general 

 plan — a small smooth helicoid tip of a whorl and a half, followed by one 

 or two whorls with a sharp peripheral keel. In the fasciole there is a 

 marked distinction. Glyphostoma has the fasciole on the larger whorls 

 traced by discrepant sculpture, but in Etrema the fasciole is obliteiated in 

 a sculpture uniform with the rest of the shell. In Etrema the tubercles 

 of the columella never ascend to the parietal wall. In other features of 

 the aperture there is a general resemblance. 



6» Gabb— Proc. Acad. Nat. Sci. Philad.. 1872, p. 270, pi. xi., fig. 4. 



66 Semper- Verb. Ver. Hamburg, ii., 1876, pp. 199-203. 



«" Angas— Proc. Zool. Soc, 1880, p. 416. 



«* Hervier — Journ. de Conch., xliv., 1896, p. 85. 



