210 Tetragonolepis angulifer, 



the South-cast of England, he had named it Hippurites, in 

 conformity with the opinion of the eminent geologists who 

 had examined specimens discovered by Mr. Mantell many 

 years since, at the Meeting of the British Association at Ox- 

 ford. At the same time, Mr. Mantell expressed his doubts as 

 to the correctness of the appropriation, and particularly pointed 

 out to Mr. Hudson the absence of the two internal longitu- 

 dinal ridges which are peculiar to the Hippurites. It must 

 be an oversight for Mr. Hudson to describe his specimen as 

 unique, when Mr. Mantell had shown him, not only portions 

 of single specimens, but also a group of four large ones. Mr. 

 Hudson's example is interesting, as exhibiting the form of the 

 cone very perfectly. Two still finer specimens have been 

 found lately in a chalk-pit, near Worthing, by Mr. Dixon. 

 Mr. Mantell would also mention that the reticulated structure 

 of these fossils more closely resembles that of the Hippurites 

 than it does that of the Conia, or others of the i?alanus 

 family. — Brighton, Feb. 27. 1836. 



Tetragonolepis angulifer is the name which Professor Agas- 

 siz has given to the species of fossil fish that is figured in this 

 Magazine, V. 549., where a notice of it is given from Mr. 

 Greaves, in whose stone quarry it had been found at Wii- 

 mert's, near Stratford upon Avon. Mr. Weaver, of the 

 Natural History Museum, Birmingham, now possesses the 

 specimen, by the liberality of Mr. Greaves. Professor Agassiz 

 does not know of any other specimen of this species, and 

 has had it drawn on stone. Tetragonolepis : the scales four 

 angled. This information is derived from the Analyst, 

 No. xiii., Oct. 1835, in which a lithograph and a notice of 

 the specimen and species are given. 



Flinty Substances found in the Ashes of burnt Hay-ricks. 

 (VIII. 631.) — I am induced to offer a few remarks on your 

 observation on this subject (VIII. 631.), from having been 

 an eyewitness of the fire that occurred in the Old Kent Road* 

 I believe on Sunday, August 2. 1835. Seven hay-ricks, con- 

 taining upwards of 200 tons of hay, several sheds, farming 

 implements, &c, were almost entirely consumed. The fire ori- 

 ginated in generated heat, and continued burning for eight 

 days. I visited the fire daily ; and, from enquiries I made of 

 the men belonging to the farm, I learned that a ton weight of 

 common salt had been sprinkled among the hay, during the 

 time it was being placed together in the ricks. This circum- 

 stance, I think, may, in some measure, account for the im- 

 mense masses of flinty matter that were found on removing 

 the ashes. It appeared to me that the salt, in a vitrified state 

 (if it be capable of assuming that state ; and here my slight 



