PISCES. 163 



FROTOSFHYESNA (continued)— 



minor (Agassiz), A. S. Woodward, Proc. Geol. Assoc, vol. x 

 (1888), p. 321. 

 Tetrapterus minor, L. Agassiz, Poiss. Foss., vol. v, pt. i (1843), 

 p. 91, pi. Ix a, f. 9, 10; J. Morris, Cat. Brit. Foss., 1854, 

 P- 345- 

 LOC. Chalk ; S. E. England. [Rostrum ; Brit. Mus.] 



(fins of). Probably described under the names of Ptychodus 

 arcuatus, Ag.,P. artiadatus, Ag., P. gibberulus, Ag., and P. 

 spectabilis, Ag. (L. Agassiz, Poiss. Foss., vol. iii (1837), 

 pp. 56-59, pis. xa,xb, f. 18), and also assigned to Pelecop- 

 terus, E. D. Cope, Vert. Cret. Form. West (Rep. U. S. 

 Geol. Surv. Territ., vol. ii, 1875), pp. 2i t \a-f. See A. S. 

 Woodward, Proc. Geol. Assoc, vol. x (1S8S), p. 321. 



PSALIODUS, P. M. G. Egerton, in L. Agassiz, Poiss. Foss., 

 vol. iii (1843), p. 351, and Proc. Geol. Soc, vol. iv (1843), 

 p. 157. 

 compressus, P. M. G. Egerton, ibid., p. 156; J. Morris, Cat. 

 Brit. Foss., 1854, p. 340. 

 LOC. London Clay ; Sheppey. [Mandib. tooth ; R. Coll. 

 Surgeons Mus.] T. 



PSA1VI2VIODU3, L. Agassiz, Poiss. Foss., vol. iii (1838), p. no; 



R. Owen, Rep. Brit. Assoc, 1838 (1839), P- 1 4°« 

 Homalodus, J. W. Davis, Trans. Roy. Dublin Soc. [2] vol. i 



(1883), p. 481. 

 Astrabodus, J. W. Davis, Quart. Journ. Geol. Soc, vol. xl, 



1884, p. 629. 



caualiculatus, M'Coy. v. Psammodus rugosus. 

 cincttis, Agassiz. v. Chomatodus cinctus. 

 contortus, Agassiz. v. Deltoptychius gibberulus. 

 cornutus, Agassiz. v. Copodus cornutus. 



expansus (Davis), A. S. Woodward, Cat. Foss. Fishes B. M., 

 pt. i, 1889, p. 105. 

 Astrabodus expansus, J. W. Davis, Quart. Journ. Geol. Soc, 

 vol. xl, 1884, p. 630, pi. xxvi, f. 1 1, 12. T. (Astrabodus^) 



LOC. Yoredale Rocks ; Wensleydale, Yorkshire. [Teeth ; York 

 Mus.] 

 gibberulus, Agassiz. v. Helodus gibberulus. 

 Icevissimus, Agassiz. v. Psephodus laevissimus. 

 linearis, Agassiz. v. Petalodus linearis. 

 porosus, Agassiz. v. Psammodus rugosus. 



rugosus, L. Agassiz, Poiss. Foss., vol. iii (1838), p. in, pi. xii, 

 f. 14-18, pi. xix, f. 15 ; J. E. Portlock, Rep. Geol. London- 

 derry, 1843, p. 466, pi. xiva, f. 1 ; J. Morris, Cat. Brit. Foss., 

 1854, p. 341 ; F. M'Coy, Brit. Palasoz. Foss. (1855), p. 644 ; 



