172 F. Chapman and Irene Crespin.- 



Prom specimens kindly lent us by Dr. Thomson from 

 New Zealand, we note that the species antipoda differs 

 from thomsoni in having a more salient beak and several 

 strong, concentric growth-lines, especially seen on the 

 dorsal valve. 



Miocene. — Curiosity Shop, Rakaia River, Canterbury, 

 N. Z. 



australis, Hemithyris, Buckman. 



Buckman, 1910, p. 12, pi. I., fig. 11. 



This smooth, sub-pentagonal form is referred by Buck- 

 man to the Rhynchonella hipartita series. From its more 

 erect form of beak and even growth-lines, it is possibly a 

 distinct form from the boreal, living hemithyrids; al- 

 though related forms are known from the Eocene and 

 Miocene of Europe, and R. lucida is living in Japanese 

 Seas. It belongs to the hypothyrid section, as pointed 

 out by J. Allan Thompson?, otherwise it is similar to 

 Thomson's generic form, Aetheia. 



Miocene. — Glauconitic Bank, Cockburn Island, Graham 

 Land. 



coelata, Rhynchonella, McCoy (in Tenison Woods). 

 Woods, J. E. T., 1878, p. 77. 



Generally referred to as an Ms. name of McCoy's. T. 

 Wood's gives a short description of the shell, which places 

 beyond doubt its identity with our common Victorian 

 form, (see postea) . 



" From several Miocene beds in Victoria," Miocene 

 (Janjukian). , 



colurnus, Hemithyris, Hedley. 



Hedley, 1905, p. 44, text-fig., 7, 8. 



The nearest ally is Hemithyris heecheri, Dall, found 

 in 313 fathoms at Honolulu. This is a triangular, 

 cordate form, smooth, except for faint growth-lines. From 

 the distinctly epithyrid foramen, this species appears to 

 belong to Thomson's genus Aetheia. 



Recent. — Dredged at 111 fathoms. East of Cape Byron, 

 New South Wales. 



depressa, Hemithyris, Thomson. 

 Thomson, 1918, p. 117. 



A small species with short beak. " Possesses numerous 

 fine ribs with imbrication towards the margin." 



Miocene (Ototaran and Lower Hutchinsonian stages), 

 — One mile north of Kakanui Quarry, Oamaru District. 



doederlevni, Rhynchonella, Davidson. 



Davidson, 1887, p. 172. pi. XXV., figs. 14, 15, text-fig. 19. 



7. Thomson, 1915, p. 390. 



