28 



Conus (Leptoconus) ligatus, Tate. 



1890. Comes ligatus, Tate, Trans. Eoy. Soc. South Aust. vol. xiii. pt. 2, 



p. 196, pi. ■vii. figs. 4, \a-b; pi. viii. fig. 9. 

 1893. Conus ligatus, Tate and Dennant, id. vol. xvii. pt. 1, p. 221. 



Protoconch (Plate II. Pigs. 2a-l) composed of two smooth 

 volations, the earlier of ■which is somewhat oblique and inflated. 

 The spire of the shell proper is of variable height, in some 

 specimens being comparatively depressed and in others so elongated 

 as to be one-third the length of the shell. Spire-whorls with an 

 obtuse, thick shoulder and ornamented with closely-set, spiral striae, 

 which persist over the whole surface of the body-whorl also, being 

 especially accentuated on the anterior half. The body-whorl 

 varies in shape from pyriform to elongate ovate, the peripheral 

 keel defined anteriorly by a linear constriction, posterior to 

 which there are one or two threads on the peripheral band. The 

 aperture is narrow, with a comparatively shallow anal sinus. 



The range of variation in this species is so great that innumerable 

 "varieties" could be established. One of them, as pointed out by 

 Professor Tate, closely resembles C. deperditus, Bruguiere, of the 

 Eocene of North-western Europe. 



This species partakes of the characters of both Leptoconus and 

 Lilhoconus ; it has been assigned to the former subgenus on account 

 of its elevated and staged spire and striated surface. 



Dimensions. — Length 40 mm. ; breadth 2r5 mm. 



Form, and Loc. — Eocene : Victoria. 



48052. Several specimens, in various stages of growth ; from 

 Schnapper Point. Purchased. 



70424. Pour specimens ; from Meribee Plains. Purchased. 



G. 4242. Two specimens ; from Muddy Creek. 



Presented hxj John Dennant., Esq. 



G. 5490. One specimen ; from Muddy Creek. Purchased. 



Conus (Leptoconus) heterospira, Tate. 



1890. Conus heterospira, Tate, Trans. Eoy. Soc. South Aust. vol. xiii. pt. 2, 



p. 197, pi. vii. figs. 6, 5a. 

 1893. Conus heterospira, Tate and Dennant, id. vol. xvii. pt. 1, p. 221. 



