2'96 



Queries and Answers. 



assemblage of disturl>ed and shattered flints which covers, in a great measure, 

 the entire superficial area of the chalk formation of this country. 



The shells consist chiefly of Inoc^rami, of the species before figured and 

 described at page 69. in Volume I. of this work (fig. 39 and 40.). They often 

 occur in groups, and a single flint may be seen marked with the distorted 

 casts and impressions of a numerous assemblage of these Testacea, without 

 any visible traces of their shells remaining. Thus, in one of Mr. Tyssen's 

 specimens, we perceive sixteen or' eighteen Inoc^rami. These surround the 

 cast of an Echinus, iS'patangus (c(5r marinum), also distorted. 



Another flint exhibits the cast of a single tubercle of a mammillated 

 echinite, of the genus Cidaris. Similar detached impressions are common 

 on fragments of flint, but entire siliceous specimens of the Cidaris are less 

 abundant, particularly in Norfolk. There is also a small plicated Terre- 

 brdtula of a species rather abundant 

 in chalk. — ii. C. T. 



The species from the chalk itself 

 are as follows : — Radiata : C6nu- 

 lus albogal^rus Mantel, t. 17.; 

 Galerites ? Lamarck ; Conulus 

 (Galerites) Rotula Brong. Acepha- 

 lous Mollusca: Inoc^ramus inter- 

 m^ius, n. s. {fig. 85. a) Mm. Con. 

 t. 440., and its hinge {b) ; Gryphae'a 

 globosa Min. Con. t. 392.; Terre- 

 bratula carnea Min. Con. t. 15. one 

 of the same cast in flint ; Terre- 

 brdtula obliqua Min. Con. t. 277. 

 — J.D.C.S. 



Minute Objects on Flints. — 

 Some time about last midsummer, 

 walking on the Precinct Meadows, 

 I was struck with the appearance 

 of the flints and other hard sub- 

 stances being partially covered with 

 a white powder, particularly in 

 the crevices. I found this powder 

 fixed, and, on further examin- 

 ation with a lens, that they must be either minute plants of the order 

 Cryptogamia, or the nidi of insects. I also found them on the high ground 

 on the opposite side of the river. The annexed sketch {fig. 84.) is from 



84 





a flint In my possession, which shall be forwarded if requested. The objects 

 appear to be in the same state as when I first brought them home. The 

 portion of the flint is one tenth of an inch in length, and the sketch is 

 magnified thirty times. The disks of the objects are finely radiated, and 

 two of them {a b) are globular. An explanation will much oblige. Sir, 

 yours, &c. — Samuel Woodward. Diana Square , Norwich y Aprils. 1829. 



I have ever considered these to be the eggs of a red J'carus, which 

 always accompanies them, as far as I have observed, J, D. C. S. 



