BihUograijhical Notices. 397 



the types of the various names are indicated. This will be very 

 useful for future reference. 



At the end of the volume we find a list of unrecognized species, 

 Borae of -which will probably be identified and referred to their 

 proper position at some future time. 



The Fauna of British India^ indudlng Cej/Ioii and Burma. Pub- 

 lished under the authority of the Secretary of State for India in 

 Council. Edited by W. T. Blanford. — Mhynchota. Vol. II. 

 Part 1 (Heteroptera). By W. L. Distant. London, 1903. 

 Pp. X, 242; figs. 1(57. 



As we are informed that the next part of this work, completing the 

 second volume, will appear very shortly, we will defer our detailed 

 notice until then, and confine ourselves for the present to recording 

 the publication of the present instalment, which extends from 

 Fam. 4. Lygoeida) to the commencement of Fam. 12. Ileduviida;. 



Memoirs of the Geological Surveif. — Paltnontologia ladica. Series IX. 

 'The Jurassic Fauna of Cutch. Vol. Ill, Part 2. The Lamelli- 

 hranchiata. No. I. Genua Trigonia. By F. L. Kitchix, M.A., 

 Ph.D., Geol. Survey England. 122 pages, Ful. Plates I.-X. 

 Calcutta, London, and Berlin, 1903. 



The Trigonia; of Cutch here figured and described have been selected 

 from among the Lamellibranchs collected by Wynne, Tedden, 

 Stoliczka, and Blanford, and entrusted to Dr. Kitchin, of London, 

 lor examination and description. The strata from which they came 

 are known as the following groups : — I. The Oomia group, probably 

 combining the Cretaceous, Neocomian, partly the Portlandian ; 

 II. The Katrol, probably combining the Kimmeridgian and Ox- 

 fordian, and constituting the L^pper Jurassic of Cutch ; III. The 

 Charec, probably representing the Kelloway strata, Middle Jurassic 

 of Cutch ; IV. The Patclmm, probably representing the Bath Oolite 

 group. These are enumerated in the second edition of the ' Manual 

 of the Geology of India,' 1893, p. 217. 



The classification of the known fossil Trigoniai into sections, 

 groups, and genera is carefully considered and clearly explained. In 

 some cases these serial divisions and subdivisions of recognized 

 forms are separated from their several allies by gaps variable in 

 extent and value, but evideiitly reducible by better knowledge of 

 the types. The most reliable observers and avithors concerned in 

 this classification have been: — Agassiz, 1840; d'Orbigny, 1843; 

 Pictet, 1866; Stoliczka, 1871 ; Lycett, 1872-1883; Bayle, 1878; 

 Choff"ar, 1885; and Bigot, 1892. Their methods and results are 

 succinctly stated at pages 7-9. 



The difi'erences due to the progress of growth in individuals (as in 

 growth-slagc);) are taken into considerati'jn on the lines more or 



