Reviews — Tertiary Echinoids, California. 375 



which should he welcome to all students of the Tertiary shells of 

 New Zealand as tending to simplify a somewhat complicated subject. 

 The author contributes carefully prepared diagnoses of the species, 

 but has failed to include the original descriptions as given in the 

 Hutton Catalogue : had that been done we should have been better 

 able to institute comparisons between the old and the new deter- 

 minations, a plan which, we think, would have rendered the 

 Revision of greater historical and scientific importance. 



The generic nomenclature adopted in the work appears to be 

 generally on an up-to-date basis, as an instance of which we may 

 observe that Turris of Bolten is used to the exclusion of Lamarck's 

 Pleurotoma, the former finding a place in Gray's Catalogue of 1847, 

 although since that time the name has been more commonly adopted 

 by American rather than by British conchologists. Attention may 

 here be directed to one of the Pelecypod determinations — Pecten 

 ( Camptonectes) huttoni. This is a true Pseudamussium, as long since 

 acknowledged both by G. F. Harris and Professor Park, and therefore 

 quite distinct from Meek's Camptonectes, which is a characteristic 

 genus of the Mesozoic period, possessing very unequal auricles as in 

 Chlamys, and furnished with divergent, bifurcating, and punctated 

 striations which are more or less obsolete over the umbonal half of 

 the valve. 



It is to be regretted that the geological information is of so meagre 

 a description. We could have wished that a scheme of the fossiliferous 

 marine Tertiaries of New Zealand had been inserted for the benefit 

 of the student, together with a good topographical map. In the 

 meantime we may here generally state that the Tertiary rocks of 

 New Zealand are recognized as being divisible into two great groups 

 — the Oamaru and the Wanganui, the former, comprising the Pareora, 

 Waihao, and some other Series, being of Miocene age, whereas the 

 "Wanganui rocks belong to the Pliocene system, and embrace the 

 Petane, Waitotara, and Awatere Series. Prom the horizons that 

 accompany the specific descriptions we gather that the author regards 

 the older Tertiary beds of New Zealand as of Miocene age, and not 

 Eocene as was formerly supposed, this being in agreement with the 

 strictest modern views that there are no true marine Eocene deposits 

 throughout Australasia. Finally, this work is excellently printed 

 and illustrated with good photographic plates, while the genera and 

 species are most completely indexed. We shall look forward with 

 much pleasure to a later fasciculus which is promised, and which is to 

 contain a revision of the specific types of New Zealand Tertiary 

 Mollusca established since 1873. T? "R "N" 



III. — Tertiary Echinoids from the San Pablo Group or Middle 

 California. By William S. W. Kew. TJniv. California 

 Publ. Geol., vol. viii, No. 20, March 2, 1915. pp. 365-76, 

 pis. xxxix-xl. 



OF the variability of the Clypeastroids there is no end, and of the 

 torrent of species thereof described there is little sign of 

 diminution. From the number of intrapetaloid tubercles that have 



