192 



The Natuealist. 



exhibited on their surface the peculiar suture-like appearance due 

 to the presence of minute films of fullers' earth deposited on 

 the irregular surface of the chalk when forming. Attention was 

 called by the conductor to the needle-shaped structure which accom- 

 panied the sutures, and specimens were taken by Mr. G. R. Vine, 

 for analysis. A magnificent potstone of flint, or paramondra, was 

 found on the shore, measuring 4ft. in diameter, with a height exposed 

 of 2ft. 6in. On returning to the true red chalk, or Hunstanton lime- 

 stone, near Speeton Gap, the following fossils were obtained : — Some 

 ■fish teeth, spines of Cidaris, BeJemnites minimus, Terebratula semi- 

 globosa, T. biplicata, and Inoceramus Coquandianus. A palatal tooth 

 of Ptychodus, from the white chalk, was also picked up. The Speeton 

 Clays were next examined — they have been carefully worked and 

 classified by Prof. Judd. They are a marine formation, equivalent to the 

 freshwater Wealden beds of the south, and are divided into upper, 

 middle, and lower, each from 150 to 200 feet thick. At the base of the 

 upper is a persistent line of cement stones. At the base of the middle, a 

 line of nodules, containing shrimps. At the base of the lower is a 

 coprolite bed. The characteristic fossils for the three divisions are : — 

 Upper, Belemnites semicaniculatus ; middle, B. jaculum, Pecten cinctus, 

 and Ancyloceras ; lower. Ammonites Speetonensis, A. Noricus, A. 

 Astierianus, Belemnites lateralis, and Exogyra sinuata. The Coprolites 

 represent beds of a Portlandian age. The upper clay is the equivalent of 

 the Atherfield Clay of the Isle of Wight. The middle clay is represented 

 in Lincolnshire by the Tealby beds, and an irony sandstone in Penis- 

 thorpe Dale, on the outer edge of the Wolds, near Kirby Underdale, in 

 Yorkshire. The Speeton Clay is overlaid by Boulder Clays — but under 

 the lowest Boulder Clay, lying on the Speeton Laver Clay, is a preglacial 

 shell-bed, of Estuarine formation, containing Cardium edule and 

 Mytilus edulis ; also Scrobicularia piperata and Tellina balthica. The 

 bed has been described in the Geol. Mag. (April, 1881) by Mr. G. 

 Lamplugh. The contorted beds of Kimmeridge Clay in the clifis and on 

 the shore were next examined. After tea some of the party visited the 

 Brigg and examined the Middle (Filey Brigg) calcareous grit and the 

 ball-bed " of the lower Calc. grit. In addition to those mentioned 

 ftbove the following fossils were found during the day : — In the Upper 

 Speeton Clay — Crioceras Duvallii, Yermicularia Sowerbii, Area, Nucula 

 obtusa, Isocardia angulata, Rostellaria Parkinsoni, and fossil wood ; in 

 the Middle Speeton Clay — Myeria ornata, Pleurotomaria, Amm. rotula, 

 A. marginatus, A. nucleus, ; in the Lower S^Deeton Clay — Astarte 

 laticosta, Thetis Sowerbii, Thracia Phillipsii, and Rhynchonella ; in the 

 Kimmeridge Clay — Amm. biplex, &c. At the Sectional meeting Messrs. « 

 Davis, Cole, Mortimer, Lamplugh, Chad wick. Vine, &c., were present. 

 For the Vertebrate Section the chairman reported. A vote of thanks 

 to Mr. Cordeaux for presiding, proposed by Mr. W. Barwell Turner, 

 F.C.S., of Leeds, closed the proceedings. — W. D. R. 



