CESTRACIONTID^. 
321 
Stroj)hodug punciatus, L. Agassiz (ex Jliinstcr 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. — Callovian ; Yorkshire. 
Strojdiodus tridentinus, K. A. von Zittel, Fauna Aelt. Ccphalopo- 
denfiihr Tithonbild. (Suppl. to Paloeontogr. 1870), 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. 02, jd. xii. 
%8. 1-0 (Lower Jfeocomian) and p. 24 (Aptian) ; and by G. G. 
emmellaro, Studi Paleont. Calc, a Terebratula janitor, pt. i. 
(1868-76), p. 9, pi. i. figs. 35-47. 
Genus BDELLODUS, Quenstedt. 
[^iirtt. Jahresh. vol. xxxviii. 1882, p. 137.] 
Teeth quadrate, with slightly arched, but flattened crown, super- 
ciaUy ornamented by reticulate markings. Symphysial teeth few. 
ceth of series i. to m. scarcely increasing in size, those of series iv. 
relatively very large and elongated. Dorsal fin-spines unknown. 
Bdellodiis boUensis, Quenstedt. 
1882. Sdellvdus bollensis, F. A. Quenstedt, Wiirtt. Jahresh. vol. xxxviii. 
P- 137, pi. iii. 
iype. Associated upper and lower dentition ; Tubingen Univer- 
sity Museum. 
Anterior teeth tumid, not keeled ; those of series iv. five times as 
as these. 
Porm. ^ Loc. Upper Lias : Boll, Wiirtemberg. 
Genus PAL.fflOSPINAX, Egerton. 
[Figs, and Descrips. Prit. Organic Remains (Mem. Geol. Survey, 
. 1872), dec. xiii. no. vii.] 
Body long and slender ; the first dorsal fin opposite the space 
Ween the pectorals and pelvics, the second partly in advance of, 
part y opposite, the anal. Dentition comparatively specialized, the 
_ nor teeth being high-crowned and prehensile, those placed pos- 
having the cusps reduced to minute beads and adapted for 
ems ing. Symphysial teeth with a single pair of lateral denticles, 
Co with two or three. Dorsal fin-spines smooth, the sides 
ered with a dense layer cf ganoine, sometimes forming isolated 
ercles immediately above the inserted portion ; posterior denticles 
r 
