130 Reviews — JVoury's Geology of Jersey. 



this matter of the muscles Iguanodon and its allies are termed by M. 

 Dollo slightly modified types, while Ceratosaurus and Diplodocus 

 are more specialized ; and just as Professor van Beneden has shown, 

 that since Miocene times the form of the skull in Mystacocete has 

 undergone a specialization by shortening, so Diplodocus presents 

 a similar specialization as compared with Iguanodon. Thus, by 

 muscular modification, the primitive terminal narine comes to occupy 

 a more backward position. It would take more space than is here 

 available to discuss these interesting speculations. 



On the prelachrymal vacuity M. Dollo observes that, it is small 

 in Dinosaurs which have the pterygoid muscles feeble, and large 

 when they are greatly developed. The pterygoid muscles are in- 

 serted in birds on the anterior border of the pre-lachrymal fossa, so 

 that it seems possible that the size of the vacuity may depend upon 

 the volume of the muscle which passes through it. 



These papers are but a small fraction of the mass of valuable 

 memoirs which the author has published. Any one who studies 

 them carefully will be impressed by the originality and power of the 

 writer. His method is his own. The memoirs that we have noticed are 

 a landmark in the history of the group to which they relate, greatly 

 adding to our knowledge, and applying the methods of comparative 

 anatomy for the elucidation of Dinosaurian structures in new ways. 

 We trust that the time is not distant when the author may be enabled 

 to issue detailed monographs, like those in which Van Beneden has 

 so well described the Mammalia of the Antwerp Crag ; for the 

 development of exact knowledge of all Dinosaurians cannot but 

 be influenced by the data for comparison which such monographs 

 would afford. When this work is done, we may anticipate that 

 stringent comparisons of form and measurement of bones will be 

 made, and that the same canons of determination will be extended 

 to fossils as have already given to the comparative anatomy and 

 zoology of living animals many of the attributes of an exact science. 



H. G. Seelky. 



III. — Geologie de Jersey. Par Le P. Ch. Noury, S.J. Pp. 173, 

 with coloured map. Price 5s. (Paris, Librairie F. Savy ; Jersey, 

 Librairie Le Feuvre.) 



THIS book is modestly described as intended principally for 

 residents and visitors, but it contains matter that may be 

 useful and interesting to any geologist. 



After a notice of previous writers and some general remarks, the 

 author commences with a " Brief Description of the Eocks." He 

 describes the nature and distribution of the many varieties of 

 eruptive rocks, classifying them as granitic, granitoid, porphyry, 

 diabase dykes, mica-trap dykes, and diorite dykes. The granitic 

 rocks are subdivided as granite proper, forming the N.W., S.W., 

 and much of the S.E. corner of the island, and granulite such 

 as that of the Mont-Mado quarries. " Granitoid " rocks include syenite 

 and diorite, the latter occurring in considerable mass on the S.E. 

 shore. Along with the porphyry are described the remarkable 



