APPENDIX TO SUPPLEMENTS, PLATE XX. 



jurassic. 

 Fig. 



1, 1 a. Bhynchonella Gingensis, Waagen. Inf. Oolite, Bradford Abbas, Dorsetshire. Coll. of Mr. 



S. S. Buckman. (P. 275.) 



2, 2 a, b, c. „ Dorsetiensis, S. S. Buckman. Inf. Oolite, zone of Am. Humphriesiana, 



Half- Way House, Sherborne, Dorset. Coll. of Mr. S. S. 

 Buckman. 2. Nat. size. 2 c. Enlarged. (P. 277.) 



3, „ Ballnensis, Szajnocha (according to Mr. S. S. Buckman). Inf. Oolite, 



zone of Am. Soiverbyi, Bradford Abbas, Somersetshire. Coll. 

 of Mr. S. S. Buckman. (P. 277.) 

 4 a, b, 5. „ fallux,H. Desl. Middle Lias, Huish Quarry, Radstock. 5. Coll. of Rev. 



G. F. Whidborne. (P. 275.) 



6, 6 a, b, c. „ Portlandica, Blake. Portland sand, Blackven, Portland. 6. A specimen 



with one rib on mesial fold, nat. size, after Blake. 6 a, b, c. 

 A Implicated example enlarged, also from the coll. of Rev. 

 J.F.Blake. (P. 273.) 



7, 7 a, b. „ Buteo, Szajnocha (according to Mr. S. S. Buckman). Inf. Oolite, zone of 



Am. Sowerbyi, Bradford Abbas, Dorset. Coll. of Mr. S. S. 

 Buckman. (P. 276.) 



8, 9, 9 a, 10, 10 a. „ Benechei, Haas (according to Buckman). Inf. Oolite, zone of Am. Jurensis, 



Bradford Abbas. Coll. of Mr. S. S. Buckman. (P. 274.) 



11, 11 a. ,, sp. Inf. Oolite, Bradford Abbas, Dorset. Collected and given to 



me by Rev. G. F. Whidborne. (P. 271.) 



12, 12 a, b. Terebratula ma.villata, Sow. Inf. Oolite, Rodborough. Collected and given to me by 



Rev. F. Smithe. (P. 264.) 



13, 13 a, b. Waldheimia reversa, S. S. Buckman. Inf. Oolite, Bradford Abbas, Dorset. Coll. of Mr. 



S. S. Buckman. These figures are added in order to com- 

 plete the illustration of the same shell in PI. XIX. (P. 267.) 



14, 14 a. „ subnumismalis, Dav. An abnormal form of the species from the A. spinatus 



zone, Middle Lias, Churchdown, Gloucestershire. Collected 

 and given to me by the Rev. F. Smithe. (P. 270.) 



15, „ anglica, Oppel. A very large example. Inf. Oolite, zone of Am. Murchisoni, 



Corton, near Sherborne. Coll. of Mr. E. Cleminshaw. (P. 270.) 



16, 16 a, b. Terebratula, sp. Inf. Oolite, zone of Am. Murchisoni, Corton, near Sherborne. 



Coll. of Mr. E. Cleminshaw. (P. 265.) 



17, 17 a. ,, curvifrons, Oppel. A very large and fine example. Inf. Oolite, zone of Am. 



Murchisoni, Corton, near Sherborne, Dorset. Coll. of Mr. E. 

 Cleminshaw. (P. 264.) 



18, 18 a, b. Koninckella liasiana, Bouchard, sp. 18. Nat. size. 18 a, b. Enlarged. Middle Lias, 



Cymbium zone, Chideock. Coll. of Rev. G. F. Whidborne. 

 (P. 278.) 



19, Discina Gunnii, Dav. Inf. Oolite, Hocknorton Railway Cutting (Banbury and Chelten- 



ham Railway), seven miles south-west of Banbury. Coll. of 

 Mr. T. Beasley. (P. 279.) 



CARBONIFEROUS SPECIES. 



20, 20 a, b, 21, 21 a. Chonetes Laguessiana, De Koninck. 20. Part of the interior of ventral valve, enlarged, 



showing a row of tubular hollow spines on the cardinal edge, 

 that open with round orifices on the inner surface of the 

 shell. The tubes on the area shown by etching of the 

 surface of the area, at first converging towards the beak 

 under the surface of the area, but on arriving at the outer 

 edge being prolonged as spines, and bending suddenly in 

 the opposite direction. This specimen was prepared by Mr. 

 John Young, F.G.S., of the Hunterian Museum, Glasgow. 

 20 a. Inner perforations between the ribs, considerably 

 magnified. 20 b. Vertical section showing the perforations 

 directing themselves towards the beaks, and passing through 

 a very small portion only of the thickness of the shell. 21. 

 Outer surface of the shell, when slightly etched, showing 

 the larger perforations due to spines and minute perfora- 

 tions on the surface of the ribs. 21 a. "Vertical section, 

 showing minute perforations,/, and spine pores, e. Carb. 

 shales, Capel Rig, East Kilbride, Scotland. (P. 280.) 



22. Aulacorhynchus Davidsoni, Barrois. After Barrois. Interior of ventral valve, showing 



muscular impressions. Carb. limestone, Villayana, Spain. 

 Given here as the species occurs in Great Britain, and is 

 described in my ' Carb. Mon. ' under the name of Chonetes 

 concentrica, De Koninck. (P. 283.) 



DEVONIAN SPECIES. 



23. Leptaena irregularis, Roemer. Middle Devonian, Lummaton, near Torquay. Coll. of 



Mr. A. Champernowne, F.G.S. (P. 285.) 



