Arthur Burnet — The Upper Chalk of North Lincolnshire. 175 



(or placenta) and BhynclwneUa Cimeri. Judging from the easterly 

 position of this quarry, and also that at Irby, it seems possible that 

 they are in the zone of Micraster cortestudinariuvi. 



The quarry a quarter of a mile west of Great Limber Church 

 is of interest, as it yielded some rather striking specimens, viz. : — 

 ilnfulaster eccentricm, Parasmilia centralis, Bliynchonella octoplicata, 

 and Rhynchonella Cuvieri. The Infulaster is a fine well-marked 

 specimen, and is the second which has been found in Lincolnshire, 

 confirming the occurrence of the species at this low horizon. 



In another pit about half a mile east-south-east of the same 

 village I found Spondylus latus, Terehratula carnea, and Ananchytes 

 sciitatus. 



From the quarry at Limber Parva I obtained Holaster planus (or 

 placenta) and Serpula, sp. The section here is very much overgrown, 

 and a better exposure of the same beds is to be found in the quarry 

 half a mile south-east of Kirmington, where Mr. Hill obtained 

 Holaster planus. I also found here a specimen of that echinoderm, 

 together with Inoceramus Cuvieri, Kingena lima, and Bliynchonella 

 Cuvieri. 



In a quarry three-quarters of a mile south of Ulceby I found 

 Magas pumilus, Terehratula carnea, Bliynchonella Cuvieri (ov reedensis) , 

 and Ostrea vesicularis. 



The quari-y a mile west of Ulceby shows soft white chalk with 

 iflint nodules and several layers of imperfect flint similar to those 

 seen at Lambcroft and Cadeby. The fossils obtainable here have 

 ■consequently a special interest, and those I found were : — 



3Iicr aster cortestudmarium. Terehratulina lata ? 



Holaster planus (ox placenta). Rhynchonella Cuvieri. 



Ostrea vesicularis. Terehratula carnea. 

 Rhynchonella reedensis. 



It is probable that this pit and the tract of chalk which lies between 

 Ulceby and Barrow is in the zone of Micraster cortestndinarium. 



Similar beds with tabular flints are seen at Wootton, and also in 

 a large quarry tlu-ee-quarters of a mile west of Thornton, but the 

 only fossils found were : — Inoceramus Cuvieri, Bhynclionella Cuvieri, 

 Bliynchonella reedensis ? and Terehratulina, sp. 



From a large quarry south of Barrow I obtained a number of 

 fossils as follows : — 



Terehratulina lata, Rhynchonella reedensis. 



Terehratula, sp. Holaster placenta. 



Magas, sp. Echinocorys [Ananchytes) scutatus. 



Kingena lima. Inoceramus, sp. 



Rhynchonella Cuvieri. 



Although the exact correlation of these beds with the chalk zones 

 in other parts of England is necessarily a matter of some difficulty, 

 Mr. Jukes- Browne considers that the pateontological evidence which 

 I have obtained establishes the existence of the zones of Holaster 

 planus and Micraster cortestndinarium in North Lincolnshire. The 

 extreme rarity of fossils, and the fact that we have to deal with 

 isolated exposures separated from each other by a distance of a mile 



