242 



Mr. Williamson on the Fossil Remains in Yorkshire. 



GENUS AND SPECIES. 



REFERENCE- 



FORMATION. 



Belemnites Aalensis 



compressus 



Nautilus astacoides 



Ammonites cornucopia 



planicostus . . 

 Clevelandicus 

 Stokesii . . . . 



■ Hawkerensis 



• annulatus . . . . 



• communis . . 



■ crassus 



elegans 



• exaratus . . . . 



• fibulatus . . . . 



• heterophyllus 

 ovatus 



• Walcotii . . . . 

 • concavus . . . . 



■ inornatus . . . . 

 ' striatulus . . . . 



• Blagdeni . . . . 



Pisces 



Reptilia. 

 Ichthyosaurus communis .... 

 ' tenuirostris .... 



Megalosaurus ? 



Plesiosaurus 



Teleosaurus Chapmanni, 



Voltz 



De Blainville, Sow. 590 



Y. & B. 13, fig. 2. Phill. 12, fig. 16 

 f Y. & B. 12, fig. 8. A. fimbriatus,"! 



I Sow. 164 J 



Sow. 73 



Y. & B. 13, fig. 7. Phill. 14, fig. 6. . 



Sow. 191 



Y. & B. 14, fig. 6. PhiU.13, fig. 8.. 



Sow. 222, fig. 2 



Sow. 107, fig. 2, Y. & B. 12, fig. 3. 



Young and Bird, p. 253 



Sow. 94, upper fig 



Y. &B. p. 266. Phill. 13, fig. 7 



Sow. 407, fig. 2 



Sow. 266 



Y. & B. 13, fig. 4. PhUl. 13, fig. 10 



Sow. 106 



Sow. 94. lower fig 



Nobis, MS 



Sow, 421, fig. 1 



Sow. 201 



Conyb., Geol. Trans., 1st series, 

 vol. v., & De la Beche, 2nd series, 

 vol.i 



Great oolite. 



Young and Bird, PI. XVI. fig. 



Alum shale. 

 Lower lias. 



Marlstone. 



Marlstone. Alum shale. 

 Alum shale. 



Inferior oolite. 



Great oolite. 



Alum shale. 



Alum shale. 



Great oolite. 



Alum shale. G. oolite ? 



Alum shale. 



