Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
PLATE X. [PLatTeE 21.] 
SECTION 2,.—P7TERYGOTUS. 
Pterygotus punctatus. Bopdy SEGMENTS, &C. 
. The central lobe of an epistoma. (Mr. A. Marston’s cabinet.) 
. Outer portion of the first segment of the body. (Cabinet of Mr. Charles Weston.) 
2 a, the margin and the tubercular plicce of the surface magnified. 
. Second segment of the body of a very young specimen. (Museum of Practical 
Geology.) 
. Third or fourth segment. (Museum of Practical Geology. ) 
. One of the posterior segments, probably the tenth. (Mr. A. Marston’s cabinet.) 
. The sculpture of this segment, magnified. 
. A segment of the body, compressed longitudinally. (Museum of Practical Geology.) 
. A segment of the body (probably exuviated, see p. 257); a, lateral sharp angle ; 
4, upper surface ; ¢, impression of under surface. (Cabinet of Col. Colvin, Leint- 
wardine. ) 
Fig. 9. A similar fragment (Museum of Practical Geology.) 
Figs. 10, 11. Indeterminable fragments. Fig. 11 may be some portion of the telson ; it is in 
Mr. Lightbody’s cabinet. 
All from the Lower Ludlow Rock of Leintwardine, Shropshire. 
