248 “LAM WSPECIES DES COLEOPTERES: 
| presented.in the jengraying. ,, Eheyparts. connecting the two, fragments are 
Hig. 3 is asmall tooth, showing the prominent transverse ridge which marks 
” “the roots on their outer side. 10 yt ‘ 1 
Fig..4.) The'innerside of a larger tooth of the form which appears to cha- 
tacterisesthesspécies,orodita her rolths vd 2 Ee 
Fig. 5, a, apparently a portion of skin without studs; ¢ and 6, studs of the 
natural size. (From the under surface of the mass fig. 1). 
HigiepiioastudlmagnifiddsioNotwoe od? gogy 4 OM : 
Fi ie wowviews of:thé supposed frontal, curved spine., i 
ig./9, eof the two,Ich yodorulites, or spines supporting the dorsal 
fins found with' the ja Aree eee De 
RR ooe~«oqooe—————e—e——e eee aes 
PLATE TV. ; 
Fossiz Remarns or a Species or Sark, from the lias of Lyme Regis, 
belonging to the extinct genus Hybodus, Agassiz, in the Cabinet of 
Edmund Higgins, Esq. 
Fig. 1 and 2 are parts of the jaws with the teeth, 
3 and 4, detached teeth, shewing ‘the osseous roots. 
5 a. c. b., skin from the under surface of Fig. 1., which is on 
some parts covered with studs. 
6 b., a stud magnified; 6 ¢., the same of the natural size. 
7 and 8, two views of a curved spine, supposed to have been 
situate in the frontal region. 
9, a spine which supported one of the dorsal fins of Hybodus, 
and which is analogous to the dorsal spines in the recent 
Port Jackson shark, Cestracion Phillipi. (Described by 
Mr. Charlesworth, ‘‘ Magazine of Natural History,” May 
1839, p. 242.) 
