74 F. Chapman and Irene Grespin : 



VUcigera^ Rhynchonella, Iliering. 



Ihering, 1897, p. 270, text-fig. 7. 



Id., 1903, p. 334. 



Ortmann, 1901, p. 70, pi. XII., figs. 3a-e. 



This species by its coarse plication, transverse shape 

 and anterior tegulation, closely approaches our new 

 species, Tegulorhynchia thomsoni. 



Miocene (Lower, Middle and Upper Patagonian). 

 Patagonia. 

 plicigera^ Hemithyris, Buckman (non Ihering). 

 Buckman, 1910, p. 12, pi. I., fig. 10. 



This species appears to differ from Ihering's R. pUci^ 

 gera on account of the narrow form of valves and char- 

 acter of ornament, which appears to be confined to the 

 anterior margin, 



Miocene. — Glauconitic Bank, Cockburn Island, Graham 

 Land. 

 racovitae, Rhynchonella, Joubin. 



Joubln, 1901, p. 5, pi. I., figs. 1-3. 



A smooth, sub-pentagonal hypothyrld rhynchonellid, 

 with only faintly sinuated anterior. 

 Recent. — Antarctic Seas. 

 squamosa, Rhynchonella, Hutton. 

 Hutton, 1873, p. 37. 



A suborbicular, finely ribbed form, tending to become 

 elongated vertically, rather than transversely. The topo- 

 type from New Zealand shows the species to be distinct 

 from the Victorian one, which we now refer to T. coelata, 

 T. Woods sp. 



(?) Oligocene (Ototaran stage). Broken River, New 

 Zealand. 

 .striata, Hemithyris, Thomson. 



Thomson, 1918, p. 11, pi. XVI., figs. 30, 31, 32, 45. 



This appears to belong to the Hemithyris Mpartita 

 group. Thomson suggests that it is the adult form of 

 the Hemithyris (Frieleia) gerlachei. It is quite distinct 

 from the Tegulorchynchia type of the nigricans series by 

 the fine radial ornament and lack of folding, as pointed 

 out by Thomson. The short beak is rather striking as in 

 that character it agrees with the nigricans type, excepting 

 for the small foramen. 



Recent. — Off Shackleton Glacier, Davis Sea, at 358 

 fathoms. 

 .sublaevis, Hemithyris, Thomson. 

 Thomson, 1918, p. 117. 



" Narrowly and strongly folded and possess numerous 

 fine ribs, little imbricated, and in many specimens almost 

 obsolete." 



Miocene (Ototaran stage). — Everett's Limestone Quar- 

 ry, Kakanui, Oamaru District. 



