CESTBACIOXTIDJE. 
321 
Strophodus punctatus % L. Agassiz (ex Minister MS.), tom. cit. 
p. 128 b , pi. xxii. figs. 1, 2.—Cenomanian: Kelheim, 
Bavaria. 
Strophodus radiato-punctatus, L. Agassiz, tom. cit. p. 128, pi. xviii. 
fig. 27.—C'allovian : Yorkshire. 
Strophodus tridentinus , X. A. von Zittel. Fanna Aelt. Cejhalopo- 
denfiihr Tithonbild. (Snppl. to Palaeontogr. 1870j, p. 24, 
pi. i. fig. 2.— Tithonian ; Trient, Tyrol. 
Teeth of Strophodus are also figured and noticed by Pictet and 
Campiche, Foss. Terr. Cretace St. Croix (1858), p. 92, pi. xii. 
figs. 1-6 (Lower Xeocomian) and p. 24 (Aptian ) ; and by G. G. 
Gemmellaro, Studi Paleont. Calc, a Terebratula janitor , pt. i. 
(1868-76), p. 9, pi. i. figs. 35-47. 
Genus BDELL0DU3, Quenstedt. 
]MTirtt. Jahresh. vol. xxxviii. 1882, p. 137.] 
Teeth quadrate, with slightly arched, but flattened crown, super¬ 
ficially ornamented by reticulate markiugs. Symphysial teeth few. 
Teeth of series i. to m. scarcelv increasing in size, those of series iv. 
relatively very large and elongated. Dorsal fin-spines unknown. 
Bdelloclus bollensis, Quenstedt. 
1882. BdelJodus boUensis , F. A. Quenstedt, W'iirtt. Jahresh. vol. xxxviii. 
p- 187 > p l Ui - #//. 
Type. Associated upper and lower dentition : Tubingen Univer¬ 
sity Museum. 
Anterior teeth tumid, not keeled ; those of series iv. five times as 
long as these. 
Form. Sj Loc. Upper Lias : Boll, Miirtemberg. 
*£*} . 
Genus PALiEOSPINAX, Egerton. 
]Figs. and Descrips. Prit. Organic Bemains (Mem. Geol. Survey, 
1872), dec. xiii. no. vii.] 
Body long and slender; the first dorsal fin opposite the space 
between the pectorals and pelvics, the second partly in advance of, 
partly opposite, the anal. Dentition comparatively specialized, the 
anterior teeth being high-crowned and prehensile, those placed pos¬ 
teriorly having the cusps reduced to minute beads and adapted for 
crushing. Symphysial teeth with a single pair of lateral denticles, 
other teeth with two or three. Dorsal fin-spines smooth, the sides 
covered with a dense layer cf ganoine, sometimes forming isolated 
tubercles immediately above the inserted portion: posterior denticles 
Y 
