570 Reviews — J. A. Thomson — Brachiopod Genera. 



various localities, together with, well drawn up faunal lists. Corre- 

 lation data, a bibliography, and well-executed plates stamp the 

 whole work as a contribution of considerable importance to our 

 knowledge of Californian Tertiarv palaeontology. 



R. B. N. 



VIII. — Brachiopod Genera: the Position of Shells with Maga- 



SELLIFORM LOOPS, AND OP SHELLS WITH BoTJCHARDIFORM BkAK 



Characters. By J. Allan Thomson. Trans. New Zealand Inst. 

 1914-15, vol. xlvii, pp. 392-403, with text illustrations. 



AS indicated by the title, this paper deals with the evolutionary 

 characters as observed in the loop and hinge structures of 

 certain Brachiopod shells. The Terebratelliform type is discussed 

 with special reference to Terehratella sanguined of Recent seas. Then 

 follow remarks on the Pachymagoid and Neothyroid types, illustrations 

 being given of the cardinal process in Pachymagas parhi (Hutton), 

 P. huttoni, sp. nov., Neothyris ovalis (Hutton), all from the New 

 Zealand Tertiaries ; and Neothyris lenticularis (Desh.) of recent 

 habitat. The author then describes the new Miocene genus Magella, 

 which possesses a Terebratelliform binge and a Ma^aselliform loop, 

 based on what he formerly determined as Terehratella Icakuiensis, but 

 which on account of the specific name being preoccupied is now 

 changed to Magella carinata. Shells with Bouchardiform beak 

 characters are next discussed, there being certain New Zealand 

 Miocene (Oamaruian) forms described by Hutton, as Bouchardia 

 rhizoida and B. tapirina, which while possessing Bouchardiform 

 beaks are furnished with Magellaniform loops and septa ; for the 

 reception of such the author proposes the new genus Bhizothyris, the 

 selected genotype of which is Hutton's Bouchardia rhizoida. Some 

 shells are said to be provided both with Magaselliform and Terebratelli- 

 form loops, but showing Bouchardiform beak characters and contour, 

 and for these is established the new genus and species Magadina broivni, 

 from the Mount Brown Beds of North Canterbury. Another new 

 genus is described as Magadinella on Tate's type of Magasella woodsiana, 

 in which the beak characters are not strictly Bouchardiform, although 

 bearing considerable external resemblance to Magadina, but with 

 a more advanced loop structure than that genus and representing an 

 early Terebratelliform stage. 



. ■ R. B. N. 



IX. — Revision of the Tertiary Mollusca of New Zealand, based 

 on Type-material. Part II. By Henry Sdter. Palseontological 

 Bulletin, No. 3, New Zealand Geological Survey (P. G. Morgan, 

 Director). 4to ; .pp. 69, with 9 plates, a transmittal letter by 

 P. G. Morgan, and a preface by Henry Suter. "Wellington, 1915. 



fPHE first part of this monograph, which was issued last year and 



1_ of which a review has already appeared (Geol. Mag. 1915, 



pp. 374-5), comprised a revision of the molluscan species described 



in the late Captain P. W. Hutton's Catalogue of the Tertiary 



