376 Reviews — G. Oaillard on Heterosorex. 



IX. — NOTJTEATT GENEE DES MtJSAHAIGNES DANS LES DEPOTS MIOCENES 



DE LA Geive Saint-Alban (Isere). By Cl. Gaillakd. Arm. 

 Linn. Soc. Lyon, torn. Ixii, p. 83. 



IN this paper Professor Gaillard gives a very detailed description of 

 the skull and mandible of an interesting new Insectivore 

 {Heterosorex delphinus) which, while evidently referable to the shrews, 

 shows some primitive characters, and in some respects approaches the 

 moles, e.g. in the possession of a complete zygomatic arch and in the 

 form of the fourth upper premolar. The skull is notable for its 

 shortness and for the relatively great width of the cranial region. 

 The mandible, so far as its posterior region goes, seems to be very 

 similar in structure to that of Neomys fodiens, but is about one-third 

 larger. The dental formula is as in Crocidura. The new form is 

 said to be most nearly related to certain Asiatic genera of shrews, 

 and also to have some resemblances with Urotrichus, a mole from 

 East Asia. Probably it had undergone considerable modifications as 

 a burrowing animal, but unfortunately the limbs are at present 

 unknown. The last part of the paper consists of a careful comparison 

 of Heterosorex with the fossil shrews hitherto known. 



X. — Patagonian Geology. 

 The Pjroblem of the CREXACEotrs-TERTiAKr BoTJNDAJir IN South 

 America, and the Stbatigraphic Position oe the San Jobge 

 Formation in Patagonia. By A. Windhaitsen. Amer. Journ. 

 Sci. [4], vol. xlv, pp. 1-53, 1918. 



IN California, Chile, and Patagonia it has been claimed that there 

 is a gradual transition from tlie Cretaceous to the Tertiary faunas, 

 with a remarkable mingling of types. Dr. "Windhausen maintains 

 that this is not the case, but that there is good evidence of a marked 

 unconformity in all these regions. He describes and discusses the 

 Upper Cretaceous and Lower Tertiary formations which he has 

 examined in Patagonia, and concludes that they are distinctly 

 separated both by a stratigraphical and by a faunistic break. He 

 agrees with the brothers Ameghino that mammalian remains have 

 been found associated with bones of Dinosaurs; but he considers that 

 this association occurs in Palseocene, not in Cretaceous, deposits. 

 Both sauropodous and theropodous Dinosaurs are met with in the 

 Cretaceous of Patagonia, but only the latter range upwards into the 

 Tertiary. 



XI. — On the Crystallography and Nomenclature of Hollandite. 



By L. L. Fermor. Rec. Geol. Surv. India, vol. xlviii, pt. iii, 



pp. 103-20, 1917. 

 N a former paper the author showed that hollandite is a crystalline 

 mineral having the same composition as psilomelane. Further 

 study of specimens from the original locality has sliown that it 

 belongs to the pyramidal class of the tetragonal system. It is also 

 pointed out that the name romanechite was applied by Professor 

 Lacroix in 1900 to a mineral from Eomaneche in France, which 

 appears to be identical with or closely allied to hollandite. 



