408 Transactions. 



The young stages of Terebratella sanguined differ in no important 

 respect from those of T. rubicunda. 



Young Stages of Neothyrls lenticularis. 



It is known from the observations and figures of Douville* and 

 Davidsonf that the loop of this species passes through Magelliform and 

 Terebratelliform stages during growth, and it is probable that the still 

 earlier stages do not differ jrom those of Terebratella. Unfortunately, I 

 have not yet been able to obtain a series of very young shells in which to 

 confirm this, though such a series should not be difficult to obtain from 

 the oyster-dredges of Foveaux Strait. The study of the development of 

 the cardinal process in this species will be of much interest. 



Additions to the List of Species occurring in the New Zealam> 



Area. 

 Liothyrina sp. ind. Fig. 8. 



Included in Mr. Hamilton's collection from Foveaux Strait there is a 

 single example of Liothyrina. This genus is characterized by a short Tere- 

 bratuloid loop, a thin shell finely punctate, and the presence of 4 radiating 

 furrows in the interior of the dorsal valve for the attachment of the pallial 

 sinuses, all of which characters are well displayed by the present example. 



Fig. "8. — Liothyrina sp., Foveaux Strait, a, dorsal view ; 6, side 

 view ; c, interior of dorsal valve. Length, 14 mm. 



In shape it is suborbicular, and entirely non-plicate, and has all the appear- 

 ance of a young shell, for which reason I do not propose to give it a specific 

 name at present. The beak characters are hardly typical of Liothyrina, 

 which usually has at least slight anterior projection of the lip of the 

 foramen ; but, again, this may be due to its youth. 



Liothyrina occurs in both the Northern and Southern Hemispheres, 

 but has not been before recorded in the New Zealand - Australian area. 

 It is known from the English chalk, and probably occurs in the Italian 

 Tertiaries, but none of the New Zealand or Australian Tertiary Terebratu- 

 loids, though in some cases thin-shelled, appear to belong here. It appears, 

 therefore, to be a recent immigrant to our waters, in contradistinction to 

 our other species, which are all descendants of known Tertiary shells. 



Neothyris ovalis (Hutton). Fig. 9. 



1886. Waldheima ovalis Hutton, Trans. N.Z. Inst., vol. 18, p. 335. 

 1905. Magellania lenticularis ovalis Hutton, Trans. N.Z. Inst., vol. 37, 

 p. 475, pi. xlv, fig. 2. 



This species is related to N. lenticularis, but differs in shape and also 

 in its less incurved beak and much larger foramen, while the cardinal 

 process is also more primitive. It is abundant in the younger Tertiary 



* Bull. Soc. Geol. Fr., ser. 3, t, 7 (1879), p. 256, fig. 3. 

 t Loc cit., pt. i, pi. 9., figs. 11, 12, 13. 



