PLATE II. 
Fig. Page 
1. Belonorhynchus acutus (Agassiz); left lateral aspect of 
head.—Lower Lias ; Lyme Regis. cl. Clavicle, n. Nasal 
opening, o. Orbit, op. Operculum, r. Extension of 
cranial roof. [P. 3791.] 15 
2. Belonorhynchus brevirostris , sp. nov.; right lateral aspect 
of head.—Ibid. Lettering as above. [40728.] 17 
3. Semionotus bergeri , Agassiz; lateral aspect.—Keuper; 
Coburg, br. Branchiostegal rays. i.op. Interoperculum, 
m. Portion of mandible, op. Operculum, p.op. Pre¬ 
operculum. s.op. Suboperculum. so. Suborbitals. 
x. Cheek-plate. [P. 7399.] 
56 
