﻿PLATE XII. 

 Fig. Page 



1. Rhizodus hibberti (Ag. & Hibb.) ; left mandibular ramus, 



external aspect, one- third nat. size. — Lower Carbon- 

 iferous Limestone ; Gilmerton. ag. Angular, d. Dent- 

 ary. inf.d. Infradentaries. [P. 3317.] 344 



2. Ditto ; lower laniary tooth, lateral aspect. — Possil Black- 



band (Middle Carboniferous Limestone) ; Airdrie. 



[P. 4800.] 344 



3. Ditto ; right clavicle, visceral aspect, one-third nat. size. 



—Gilmerton. [21222 f.] 345 



4. Ditto ; right infra clavicle, visceral aspect, one -third nat. 



size.— Ibid. [24841.] 345 



5. Bhizodus oimatus, Traq. ; operculum, external aspect. — 



Ibid. [P. 3321.] 347 



6. Ditto ; right clavicle, imperfect superiorly, external aspect. 



—Ibid. [P. 3345.] 347 



7. Ditto ; right infraclavicle, visceral aspect. — Ibid. 



[P. 3321.] 347 



8. Ditto ; scales, external aspect.— Ibid. [P. 3345.] 347 



9. Ditto ; scale, inner aspect.— Ibid. [36914.] 348 



