65 



Dimensions. — Of tlie small example of 5 whorls — total length 

 41, of aperture 31 ; width of last whorl, 19 millimetres. Of the 

 larger example — total leng-th by estimate, 53 ; of aperture, 40 ; 

 width of last whorl, 25 millimetres. 



Locality. — One example, cast up at Middleton (Mr Adcock) ; 

 the species previously known to Mr. Bednall by aii example 

 A\'ithout locality in the South Australian Museum. 



This species has the general aspect of F. Pacifica, V. KreuslercE, 

 and V. Thatcher i, and, like them, has peripheral nodulations ; in the 

 arrangement of the colour lines it combines the characteristics of 

 V. BednctUi, A. Brazier, and V. Angasi, Tate. It is a much wider 

 shell with a shorter spire than either V. Kreuslerce or F. Thatcheri, 

 and specially differs from F. Pacifica by its narrow aperture, not 

 widening anteriorly as in that species. 



Stylifer brunneus, spec. nov. Plate xL, fig. 9. 



Shell subgiobose ; spire short, acuminately produced ; apex 

 cylindrical, styliform ; the other whorls are convex, of moderate 

 increase, slightly depressed at the posterior suture ; sutures 

 linear. Last whorl large, faintly angulated at the base and de- 

 pressed at the suture, and in consequence having a perceptibly 

 subquadrate outline. 



Outer lip thin, regularly curved, acutely angled posteriorly ; 

 columella thin, slightly elevated, defined by a superficial groove 

 behind. 



Colour dark brown, shining, black-brown around the suture, 

 marked with microscopic crowded obliquely transverse lines and 

 with distant spiral lines. 



Animal with a large expanded disk-like mantle. 



Dimensions. — Length, 5 ; breadth, 3-5 millimetres. 



Locality. — Parasitic on Strongylocentrotus, invariably on the 

 periproct, in eight to ten fathoms, Capel Sound, Port Phillip {J. 

 B. Wilson). 



This new species resembles in its squat shape S. Turtoni, 

 S. astericola, S. ovoideus, and >S'. dubia; but it has not the insinuated 

 outer lip, obtusely-angled posteriorly, of those species. In its 

 regular curved outer lip and general shape it agrees with S. Stimp- 

 soni, Verrill, and S. Orhignyanus, Hupe ; but the more rapidly 

 enlarging whorls and subquadrate last whorl distinguish it from 

 them. 



Umbrella corticalis, spec. nov. Plate xi., fig, 11. 



Shell orbicular in outline, moderately elevated, with the apex 

 prominent, somewhat incurved, and a little excentric ; covered, 

 except apex, with a well developed epidermis, which extends 

 about half as far again as the shell. The epidermis is raised into 

 about 20 broad rays, diverging from the apex, and is concentri- 



