162 



The n.arrow tuberculose band and the geniculate varicose costfe 

 distinguish this species. 



7. Terebra mutica, spec. nov. Plate x., fig. i. 



Shell small, narrowly cylindrical, ending in a relatively large 

 subgiobose pullus of one and a half turns. Ordinary whorls six 

 and a half, flatly convex, separated by an impressed suture, 

 transversely plicate. 



PlicfB stout, slightly arched, subnodulose near the suture, in- 

 terrupted in the posterior-third or so by a broad shallow constric- 

 tion, there are about 20 on the penultimate w^horl; axial furrows 

 •obscurely longitudinally striated ; base smooth. 



This species has some resemblance to the young of T. additoides, 

 but is much narrow^er, has more plications and a different pullus. 



Dimensions. — Length, 7 ; breadth of last whorl, 1-75. 



Locality. — Lower beds at Muddy Creek. 



8. Terebra subspectabilis, spec. nov. Plate ix., fig. ii. 



Shell stout, rather broadly pyramidal, apex obtuse, of one and 

 a half turns. Ordinary whorls seven, flatly convex, suture linear, 

 transversely plicate. PHceb stout, subangular, nearly straight, 

 interruptecl in the posterior-third by a very broad shallow con- 

 striction there are about twenty on the penultimate whorl; 

 base obscurely spirally wrinkled. 



This species differs from T. mutica by its shape, and from 

 T. additoides by being broader, and by its stout plicae, different 

 pullus, and antesutural constriction. 



Dimensions. — Leng-th, 18; breadth of last whorl, 5. 



Locality. — Upper beds at Muddy Creek. 



9. Terebra simplex, Tenison Woods. 

 Reference. — Proc. Roy. Soc, Tasmania, for 1875, p. 21, tab. 1, 



ffg. 1. 



This species has the general form of T. macidata, Linnaeus, but 

 the whorls are slightly shouldered and strongly arcuately Avrinkled 

 transversely; the posterior whorls have straight, distant, angular 

 plications. There is no infra-sutural groove, though the anterior 

 whorls of large examples show a faint depression in the posterior- 

 i:hird. 



Dimensions of largest examples of 15 whorls: — Length, 70; 

 breadth of last whorl, 15 millimetres. 



Localities. — Table Cape, Tasmania (T. Woods): lower beds at 

 Muddy Creek, Hamilton, Victoria (R. T.). 



The specific name given to this fossil is preoccupied by a Cali- 

 fornian shell described by P. Carpenter; but as that -'is very 

 probably a minor variety of T. variegata (Gray)," Tryon, there is 

 no need to apply a new designation. 



