Thomson. — Brachiopod Genera. 



399 



case, the hinge-pattern of these shells prevents their inclusion in either 

 Magellania or Neothyris. Consequently a new genus is necessary, for which 

 I propose — 



Rhizothyris|^en.^nov. 



Genotype, Boxichardia rhizoida Hutton. 



The other species, Boachardia tapirina Hutton (non Waldheimia tapirina 

 Hutton), I now rename Rhizothyris curiosa, the holotype being a specimen 

 in the Dominion Museum from the Curiosity Shop beds, Rakaia River, 

 Canterbury (fig. 6). 



Fig. 6. — Rhizothyris curiosa Thomson, holotvpe, Curiosity Shop. 

 (Figs, by Dr. C. A. Cotton.) 



Fortunately, we can point to shells both with Magaselliform and with 

 Terebratelliform loops which possess rouchardiform shape and beak cha- 

 racters, and thus fill the gap between Bouzhordia and Rhizothysis TheSv. 

 shells require separate generic recognition, and for the former I propose — 



Magadina gen. nov. 



Genotyp'f, Magadina browni sp. nov., Mount Brown beds, Waipara 

 district, North Canterbury (fig. 7). (Fee appendix.) 



Besides the genotype and Magadina waiparensis (fig. 8), another new 

 species {torn the Mount Brcwn beds, there are several already-described 





Fig. 7. — Magadina browni Thomson, Mount Brown beds, Waipara, 

 Weka Pass district, a, b. Holotype (twice natural size). 



c. Interior of dorsal valve, paratype (twice natural size). 



d. Partial interior of both valves, paratype (natural size). 



forms, all Australian, which combine Bouchard-form shape with Magasel'i- 

 form loops. Such are Magasella cretacea Etheridge (fig. 9), 7\irebratula 

 compta Sowerby (fig. 10), Magasella compta Tate (? of Sowerby), a species 



