174 ORGANIC REMAINS. 



Turbinacese. Cirrus, 1, depressus,* Kelloways rock ; 2, cingulatus,* cnlcareous 



grit. 

 Trochusidae. Solarium, 1, tabulatum,* Speeton clay ; 2 calix,* inferior oolite. 



Trochus, 1, granulatus, coralline oolite, cornbrash, and inferior oolite ; 



2, reticulatus ? Speeton clay ; 3, pyvamidatus,* 4, bisertus,* inferior 

 oolite ; 5, monilitectus,* Bath oolite ; 6, bicarinatus, 7? tornatus,* 

 coralline oolite ; 8, guttatus,* Kelloways rock ; 9, anglicus, lias. 



Neritaceae. Nerita costata, inferior oolite. 



Natica, 1, tumidula,* (minuta, Min. Conch.) inferior oolite ; 2, arguta,* 



3, nodulata,* 4, cincta,* coralline oolite ; 5, adducta,* Bath and 

 injerior oolite ; 6 ? lias. 



REMAINS OF CEPHALOPODOUS MOLLUSCA. 



(CHAMBERED UNIVALVE SHELLS.) 



Orthoceridse. Belemnites, 1, gracilis,* Oxford clay ; 2, fusiformis, Speeton clay and 



coralline oolite ; 3, Listeri, red chalk ; 4, mucronatus, white chalk ; 



5, sulcatus, coralline oolite, calcareous grit, Oxford clay, Kelloways 



rock, (Speeton clay ? and Kimmeridge clay ?) 6, abbreviatus, Bath 



oolite ; 1, conicus, 8, tubularis, 9, compressus, lias. 



Nautilidae. Nautilus, 1 lineatus, inferior oolite ; 2, astacoides, lias ; 3, hexa- 



gonus, Kelloways rock ; 4, annularis, lias, and others in Speeton 

 clay and Brandsby slate. 



Ammonites. Section 1. Without a dorsal keel or furrow ; 1, sublaevis, coralline oolite 

 and Kelloways rock ; 2, marginatus,* 3, nucleus,* Speeton clay ; 



4, terebratus,* 5, Herveyi, cornbrash , 6, Gowerianus, Kelloways 

 rock; 1, crassus, 8, Henleyi, 9, heterogeneus, 10, heterophyllus, 

 lias ; 11, Sutherlandia?, coralline ooHte and calcareous grit; 12, 

 rotula, 13, trisulcosus,* 14, venustus,* 15, concinnus,* Speeton clay ; 

 16, Lamberti ? Speeton clay and coralline oolite ; 7, plicomphalus ? 

 Kimmeridge clay ; 18, Blagdeni, Bath oolite ; 19, subarmatus, 

 20, fibulatus, 21, armatus, 22, communis, 23, angulatus, 24, annu- 

 latus, lias ; 25, plicatilis, 26, triplicatus, coralline oolite , 27, Ver- 

 noni, Oxford clay ; 28, Koenigi, 29, bifrons,* Kelloways rock ; 

 30, fissicostatus,* Speeton clay ; 31, Williamson!,* coralline oolite; 

 32, maculatus, 33, planicostatus, 34, gagateus, 35, brevispina, 36, 

 Jamesoni, 37, balteatus,* 38, erugatus,* 39, arcigerens,* lias ; 40, 

 hystrix,* Speeton clay ; 41, athleta,* Oxford clay and Kelloicays rock ; 

 42, perarmatus, calcareous grit and Kelloways rock ; 43, curvinodus,* 



