PISCES. 163 
PROTOSPHYREINA (continued)— 
minor (Agassiz), A. S. Woodward, Proc. Geol. Assoc., vol. x 
(1888), p. 321. 
Tetrapierus minor, L. Agassiz, Poiss. Foss., vol. v, pt. i (1843), 
ip. Ol; pl.ilx a, & 6,10; J. Mortis, Cat. Brit; Foss., 1854, 
p. 345. 
Loc. Chalk ; S. E. England. [Rostrum; Brit. Mus.] 
(fins of). Probably described under the names of Péychodus 
arcuatus, Ag., P. articulatus, Ag., P. gibberulus, Ag., and P. 
Spectabilis, Ag. (L. Agassiz, Poiss. Foss., vol. ili (1837), 
pp. 56-59, pls. x a, x J, f. 18), and also assigned to Pelecop- 
terus, E."2! Cope, Vert. Cret. Form. West (Rep. U. S. 
Geol. Surv. Territ., vol. ii, 1875), pp. 244a—— See A. S. 
Woodward, Proc. Geol. Assoc., vol. x (1888), p. 321. 
PSALIODUS, P. M. G. Egerton, in L. Agassiz, Poiss. Foss., 
vol. iii (1843), p. 351, and Proc. Geol. Soc., vol. iv (1843), 
Pp. 157. 
compressus, P. M. G. Egerton, zd¢d., p. 156; J. Morris, Cat. 
Brit. Foss., 1854, p. 340. 
Loc. London Clay; Sheppey. [Mandib. tooth; R. Coll. 
Surgeons Mus. ] 7. 
PSAMIMODUS, L. Agassiz, Poiss. Foss., vol. iii (1838), p. 110; 
R. Owen, Rep. Brit. Assoc., 1838 (1839), p. 140. 
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. 
candliculatus, M‘Coy. v. Psammodus rugosus. 
cinctus, Agassiz. v. Chomatodus cinctus. 
contortus, Agassiz. wv. Deltoptychius gibberulus. 
cornutus, Agassiz. wv. 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, pl. xxvi, f. 11, 12. T. (Astrabodus.) 
Loc. Yoredale Rocks ; Wensleydale, Yorkshire. [Teeth ; York 
Mus. ] 
gibberulus, Agassiz. v. Helodus gibberulus. 
leevissimus, Agassiz. v. Psephodus levissimus. 
linearis, Agassiz. v. Petalodus linearis. 
porosus, Agassiz. v. Psammodus rugosus. 
rugosus, L. Agassiz, Poiss. Foss., vol. ii (1838), p. 111, pl. sil, 
f. 14-18, pl. xix, f.15; J. E. Portlock, Rep. Geol. London- 
derry, 1843, p. 466, pl. xiv a, f.1; J. Morris, Cat. Brit. Foss., 
1854, p. 341; F. M‘Coy, Brit. Palaeoz. Foss. (1855), p. 644 ; 
