SOAVERBY : S. AUSTKALIAN PLEUROTOJIID^. 29 



by tlie decided outward curve of the lip forming a sharp angle on 

 each side of the sinus. 



From the description I think Tenison-Woods' Mangilia philomena 

 is a synonym for (Jlathurella 2')C-rvula, but, in the absence of a figure, 

 and not having seen an authentic specimen, I cannot say with 

 certainty. 



21. Clathtteella bicolor, Angas, Proc. Zool. Soc. 1871, p. 18, 

 pi. i, fig. 20. This species may be distinguished from the smaller 

 forms of C. parvula, by its more elongated and less angular form. 



22. Mangilia Adcocei, nom. nov. 



I propose this name for the 31. hella of Adams and Angas (Proc. 

 Zool. Soc. 1863, p. 419, pi. xxxvi, fig. 6), their name being pre- 

 occupied by Hinds. Tryon (Manual of Conchology, vol. vi, p. 270) 

 considers it identical with M. BoaJcei, Nevill, a Ceylon shell with whieli, 

 from the figure and description, it seems to me to have but little 

 afiinity. Adcock's list gives as a synonym 31. gracilina, Ten. -Woods, 

 but I have sought the records in vain for the name. M. Adcochi is 

 an elegantly formed shell, with a very acute spire and moderately 

 attenuated base ; the ribs are numerous, thick and rounded, crossed 

 by numerous rather faint spiral sulci. Fresh, adult specimens are 

 much larger than Adams' type, measuring 16-19 mm. in length. It 

 is a true Mangilia., though approaching Cgthara in form. 



23. Mangilia picta, Adams and Angas, Proc. Zool. Soc. 1863, 

 p. 419, pi. xxxvii, fig. 7. 



= Meredith(2, Ten. -Woods, Proc. Eoy. Soc. Tasm. 1875, p. 142. 



= t(dmata, Ten. -Woods, ibid. 1878, p. 36. 



This species varies somewhat in form, and considerably in colouring. 

 The type has a broad brown baud occupying the upper half of the 

 body- whorl ; some specimens are pale straw-colour without markings, 

 and others are covered with brown spiral linear bands ; and usually 

 a brown line appears just above the angle. 



JIab. — Spencer's and St. Vincent's Gulfs. 



24. Mangilia St.-Gall^, Ten. -Woods, Eoy. Soc. Tasm. 1876, 

 p. 137; and var. Benedicti. I have not been able to identify this 

 species. 



25. Mangilia alucinans, n.sp. PI. Ill, Fig. 12. 



Testa breviter fusiformis, straminea, spiraliter fusco interruptim 

 lineata; spira acuminata, acutiuscula, gradata ; anfractus 7-8, obtuse 

 angulati, spiraliter leviter sulcati, costis longitudinalibus crassis, 

 rotundatis, rectis instructi ; anfractus ultimus spiram aequans, superne 

 obtuse angulatus, deinde leviter convexus, basim versus attenuatus, 

 hand rostratus ; apertura mediocriter lata, utrimque angustior ; 

 columella rectiuscula ; labrum arcuatum, postice vix sinuatum. 

 Long. 6-50, diam. 3 mm. 



iZaS.— Yankalilla Bay. 



This species may be distinguished by its thick, rounded, straight 

 ribs ; the spiral grooves are more or less distinct. Some specimens 



