138 Reviews — The PalceontograpJdcal Society of London. 



stratigraphy is full of interest and value to the student of Jurassic 

 geology. At the commencement of the work the author adopted the 

 term " Sowerhyi-&\x\)ZO\iQ " for the highest bed of the Lower 

 Division, though not without protest. Subsequently he realized 

 that this important life-horizon should bear the name of its most 

 characteristic Ammonite, A. concavus. The Sauzei-hed, which is 

 much more nearly on the Soioerbyi-horlzon, forms the base of the 

 Upper Division, and is included broadly in the Mumphriesianus-zone. 



Among the species described ai'e two fresh-water forms — Paludina 

 Langtonensis and Valvata comes: these come from a " mortar-like 

 deposit," apparently the ancient decomposed surface of the Chipping 

 Norton Limestone. Associated with them there is " apparently 

 a Bathonian fauna," so that the evidence tends to show that these 

 fresh-water forms may belong to the (local) base of the Great 

 Oolite Series. 



In a footnote (on p. 492), the author describes a new genus from 

 the junction-bed of the Middle and Upper Lias at Thorncombe, 

 Dorset, naming it Wilsonia Liassica, in honour of Mr. E. Wilson. 

 The species is figured on plate xliv. 



3. Dr. Wheelton Hind's monograph on Carbonicola, Anth-acomyn, 

 and Naiadites (Pai't III) is brought to a termination, and completed 

 with one plate, an appendix, and index. 



4. Dr. Wheelton Hind commences a fresh monograph on the 

 British Carboniferous Lamellibranchiata i why this new departure ? 

 Could not the earlier described forms have been included in the 

 later and more embracing title? The plates by Mr. A. R. Searle 

 are admirable. The author deals in his Inti-oduction with the 

 horizons in the Coal-measures in which molluscan fossils occur; he 

 then gives a bibliographical sketch of the works which have been 

 already published dealing with the fossils of this formation ; 

 commencing with the Rev. David Ure's classic work " The Natural 

 History of Rutherglen " (1793); and adding descriptions of the 

 species of Modiola and LitJiodomus. We shall notice Dr. Wheelton 

 Hind's work again later on. 



5. The Rev. G. F. Whidborne continues his monograph on the 

 Devonian Fauna, taking up in this volume the Fauna of the 

 Marwood and Pilton Beds of N. Devon and Somerset. The author 

 deals with fish-remains in the form of scales of Holoptychius from 

 Ashford ; a new Myriopod named Cariderpestes gyius, an obscure 

 form, possibly part of a Jiuphoberia ? but difficult to determine. We 

 have also Phyllocarids ; a supposed cirripede {Anatifopsis) ; three 

 Trilobites (Brachymetopus, Fhacops, and Phillipsia) ; numei'ous 

 Ostracods ; and many Mollusca; carefully illustrated in sixteen plates. 

 We cannot but admire Mr. Whidborne's industry and energy in 

 working out, both in the field and in the study, the fauna of his own 

 Devonian formation, and making so many fossils known, by means 

 of figures and descriptions, from these ancient rocks. 



