746 STUDIES ON AUSTRALIAN MOLLUSCA, Xll., 



ing the conclusion that Murex capucinus Lamarck, (perhaps 

 related to M. torrefactus Sowerby, or Purpura tuhulata Martyn) 

 is distinct from Murex monachus capuciuus Chemnitz, that the 

 latter has received no other name, and that the polynomial has 

 no standing in nomenclature, it is proper to advance an unnamed 

 Australian species by the new name of Mui'ex permcestus. 



This tropical species is about the size and shape of M. denudatus 

 Perry, but more massive, with the frills suppressed and almost 

 black. Shell very solid, biconical. Colour uniform chocolate- 

 brown to slate-black. Whorls about eight, apex always eroded, 

 contracted below the suture, which undulates across the ribs of 

 the previous whorl. Sculpture : three to each whorl, thick scaly 

 varices, either shorn or with a few short frills, ascending the 

 spire obliquely; these describe a quarter of a revolution. Between 

 the varices are a pair of broadly undulating peripheral ribs. 

 On the last whorl are about twenty spiral cords between which, 

 on the periphery, smaller threads are intercalated. Aperture 

 comparatively small and round, narrowly channelled above, outer 

 lip slightly everted with half-a-dozen entering denticles, inner lip 

 simple, thickened at the margin, and folded over anteriorly. 

 Snout very broad, canal slightly recurved. Figured specimen, 

 55 mm. long, 27 broad. Another from Port Darwin, 65 mm. 

 long, 33 broad. 



Hab. — lO fathoms, oif Mapoon, Queensland, (type, figured 

 specimen, dredged by self); crawling on mud, among the man- 

 groves at Cape York; beach, Port Darwin. 



Kalydon vinosus Lamarck. 

 (Plate Ixxxv., fig.88.) 



In the previous part of this series [antea, xxxviii , p. 330), the 

 identity of Buccinum vinosum, Lamarck, with Purpura littorin- 

 oides Tenison-Woods, was noted. A figure is now presented of 

 a Tasmanian specimen, 14 mm. in length, which was approved as 

 authentic by the Geneva Museum. 



The species has two colour-forms; in the type, as the name 

 implies, the interior is purple; in the other, it is yellow. This 

 latter has already been noticed by Crosse as Ricinula adelaidensis 



