Geological Society. 399 



Of these thirty species only two were determined as occurring 

 in Cutch previously, namely THgonia Smeei and T. ventricosa. The 

 former has long been known as an Indian species, and the latter 

 also in India as well as in the Uiteuhage strata of South-east Africa 

 and lately it has been found in German East Africa. 



In the Appendix at page 121 Dr. Kitchin refers to the Mesozoic 

 Mollusca collected during W. Bornhardt's Journey in German East 

 Africa (1895-97), and described by Dr. G. Miiller in 1900, who 

 regards two of the species as Jurassic ; but two of the others he 

 considers to be of Lower Neocomian age, namely T. ventricosa 

 Krauss, and its associate T. Bcyschleyi, Miiller. T. Kuehni Midler' 

 is said to be of Upper Neocomian age. It is evidently certain that 

 there is a resemblance (Dr. Kitchin says) of the German East- 

 African fossils to those of the Oomia group and those of Uitenhao-e 

 as far as the lamellibranchs bear evidence at present (nacres 9 1 lV 

 121, &c.). U ° ' ' 



The numerous figures of Trigonia? in the ten lithographic plates 

 are excellently well drawn, of natural size, by Miss G. M. Wood- 

 ward, of London. 



Circulars on Agricultural Economic Entomology 

 Issued by the Trustees, Indian Museum. " 



We have received the following numbers of these useful publications 

 which are accompanied with good recognizable uncoloured illustra' 

 tions, and are issued at the price of 3 or 4 annas per dozen for 

 general circulation in India. ' 



No. 1. The Rice Sapper {Leptocorisa acuta). 



2. The Bengal Rice Hispa (Hispa cenescens). 



3. The Sugar-cane Borer (Chilo simplex). 



4. The Rhinoceros or Date-Palm Beetle (Oryetes rhinoceros) 



5. The North-west or Migratory Locust (Aeridium pere- 



gnnum). l 



6. The Cut- Worm (Agrotis ypsilon). 



PROCEEDINGS OE LEARNED SOCIETIES. 

 GEOLOGICAL SOCIETY. 



January 20th, 1904.— Sir Archibald Geikie, D.C.L., D.Sc, Sec.R S 

 Vice-President, in the Chair. 



The following communication was read: 



v '•? 1 n ^ e / aWS T ° f Pt V cJl0 ' lus from the Chalk.' B v Arthur 

 Smith Woodward, LL.D., E.R.S , F.L.S, E.G.S. 



Hitherto no traces of the cartilaginous jaws of this fish have been 

 found m association with the dentition ; but Mr. Henry Willett haa 



