Edicard Wilson — Type Fossils in the Bristol Museum. 367 



Chomatodw (Psammodus) cinctus, L. Agassiz, Poiss. Foss. vol. iii. p. 107, pi. xv. fs. 



13, 15, 1(5, 17. Undetermined anterior teeth of Cochliodont Sharks, A. S. 



Woodward, Cat. Foss. Fish. B. M. pt. i. p. 218 [teeth]. Carb. Limest. (black 



rock), Avon Gorge, Clifton. 

 Chomatodus (Psammodus) linearis, L. Agassiz, Poiss. Foss. vol. iii. p. 108, pi. xii. fs. 



5, 7 — 13. Petalodus (Chomatodus) linearis, Agass., A. S. Woodward, Cat. 



Foss. Fish. B. M. pt. i. p. 45, as to specimens, fs. ? 5, 9, 10, ? 11 (supra) ; 



Helodus expansus, J. W. Davis, Scient. Trans. Roy. Dublin, Soc. vol. i. ser. ii. 



p. 457, as to specimens, fs. 7, 8, 12, 13 (supra), [teeth]. Carb. Limest. (black 



rock), and L. Limest. Shales (bone bed), Avon Gorge, Clifton. 



Note. — The specimens fs. 9 and 10 supra are from the L. L. 

 Shales, fs. 7, 8, 12, 13, from the Carb. Limest. 



Cladodus Milleri, L. Agassiz, Poiss. Foss. vol. iii. p. 199, pi. xxiiJ. f. 22 ; syn. of 

 Cladodus mirabilis, Agass., A. S. Woodward, Cat. Foss. Fish. B. M. pt. i. p. 

 16 [tooth]. Carb. Limest. (black rock), Avon Gorge, Clifton. 



Cochliodus (Psammodus) contortus, L. Agassiz. Poiss. Foss. vol. iii. p. 115, pi. xiv. f. 

 22, and fs. 24, 27. 33; (pars) syn. of Tomodus convexus, Agass. MS., J. W. 

 Davis, Scient. Trans. Roy. Dublin Soc. vol. i. ser. ii. p. 446, as to f. 24 (supra), 

 A. S. Woodward, Cat. Foss. Fish. B.M. pt. i. p. 191; (pars) syn. of Delto- 

 ptychius gibberulus, Agass. MS. J. W. Davis, op. cit. p. 435, as to f. 33 

 (supra) ; A. S. Woodward, op. cit. p. 214 ; (pars) syn. of Pseplwdus, sp. as to 

 f. 22 (supra) [teeth]. Millstone Grit, Honeypen Quarry, Brandon Hill, 

 Bristol. Carb. Limest. Avon Gorge, Clitton. 



Note. — Specimen f. 22 is from the Millstone Grit, the remainder 

 from the Carb. Limest. 



Ctenacanthus brevis, L. Agassiz, Poiss. Foss. vol. iii. p. 11, pi. ii. f. 2 ; J. W. Davis, 

 Scient. Trans. Roy. Dublin Soc. vol. i. ser. ii. p. 337 [dorsal spine]. Carb. 

 Limest. (black rock), Avon Gorge, Clifton. 



Ctenacanthus major, L. Agassiz, Poiss. Foss. vol. iii. p. 10, pi. iv. fs. 1, 2; J. W. 

 Davis, Scient. Trans. Roy. Dublin Soc. vol. i. ser. ii. p. 334 [dorsal spine], 

 Carb. Limest. (black rock), Avon Gorge, Clifton. 



Cyclarthrus macroptcrus , L. Agassiz, Poiss. Foss. vol. iii. p. 382, pi. xliv. f. 1; Te.cto- 

 spondyli incertce sedis, A. S. Woodward, Cat. Foss. Fish. B.M. pt. i. p. 156 

 [fragments of pectoral finj. L. Lias, Lyme Regis. 



Gyronchus oblongus, L. Agassiz, Poiss. Foss. vol. ii. pt. ii. p. 202. pi. lxixa. fs. 10, 11 ; 

 Mesodon, K. A. von Zittel, Handb. Palseont. vol. iii. ( 1889), p. 247 ; A. S. 

 Woodward and C. D. Sherborn, Brit. Foss. Vert. p. 120 [vomer]. Stones- 

 field Slate, Stonesfield. 



Note. — In Morris's Cat. British Fossils, 2nd ed. p. 344, we find 



the following : — " Scaphodus, Agassiz, 1845 ? Gyronchus, Agassiz ; 

 heteromorphus, Ag.. Bristol Museum, Gr. O. Stonesfield." The type 

 specimen of Gyronchus oblongus, Agass., in the Bristol Museum 

 was formerly labelled Scaphodus heteromorphus, Ag., and this was 

 evidently the origin of the above. In the " Poissons Fossiles " I 

 find no reference to any such form as Scaphodus heteromorphus, and 

 know nothing of any such name, nor any authority for considering 

 it synonymous with Gyronchus oblongus, Agass. 

 Helodus (Psammodus) gibberulus, L. Agassiz, Poiss. Foss. vol. iii. p. 106, pi. xii. f. 1 ; 



A. S. Woodward and C. D. Sherborn, Brit. Foss. Vert. p. 93 ; undetermined 



anterior teeth of Cochliodontidse, A. S Woodward, Cat. Foss. Fish. B.M. pt. 



i. p. 219 [teeth]. Carb. Limest. Avon Gorge, Clifton. 

 Helodus (Psammodus) Icevissimus, L. Agassiz, Poiss. Foss. vol. iii. p. 104, pi. xiv. 



fs. 8. 11, 13, 14, 15; A. S. Woodward, Cat. Foss. Fish. B.M. pt. i. p. 181. 



Psephodus as to fs. 8, 11, 13, 14, ? Tomodus as to f. 15 [teeth]. L. Limest. 



Shales (bone bed), Avon Gorge, Clifton. 

 Helodus (Psammodus) subteres, L. Agassiz, Poiss. Foss. vol. iii. p. 105, pi. xii. f. 4; 



Orodus, J. W. Davis, Scient. Trans. Roy. Dublin Soc. vol. i. ser. ii. p. 399, 



pi. i. f. 15; syn. of Orodus ramosus, Agass., " a much abraded tooth," A. S. 



Woodward, Cat. Foss. Fish. B.M. pt. i. p. 231 [tooth]. Carb. Limest. (black 



rock), Avon Gorge, Clifton. 

 Helodus (Psammodus) turgidus, L. Agassiz, Poiss. Foss. vol. iii. p. 106, pi. xv. 



fs. 5-12; A. S. Woodward and V. D. Sherborn, Brit. Foss. Vert. p. 95; 



