558 
PUATE XLVI. 
Fic. 1. ACONDYLACANTHUS COLEI, Davis, 
» la. Enlarged portion of surface. 
Carboniferous Limestone, Armagh, . . £2 coll. Karl of Enniskillen. 
Fig. 2, ACONDYLACANTHUS JENKINSONI, M‘Coy, . $ : ; : 6 
» 2a. Enlarged portion of surface. 
», 26. Transverse section of the spine, enlarged. 
Carboniferous Limestone, Lowick, Northumberland. 
Ex coll. Woodwardian Museum, Cambridge. 
Fig. 3. ACONDYLACANTHUS ATTENUATUS, Davis, . F : : 5 
» oa. Transverse section of the spine. 
» 236. Enlarged portion of surface. 
Carboniferous Limestone, Armagh, x coll. Woodwardian Museum, Camb. 
Fig. 4. ACONDYLACANTHUS TUBERCULATUS, Davis, : j . : 
», 4a. Enlarged portion of surface. 
Limestone, Armagh, é . . x coll. Karl of Enniskillen. 
Fie. 5. ACONDYLACANTHUS DIsTANS, M‘Coy, 3 3 : : j F 
» 5a. Enlarged portion of surface. 
Limestone, Armagh, : 3 . Ex coll. Enniskillen Collection, 
Fic. 6. ACONDYLACANTHUS JuUNCEUS, M‘Coy, ; 3 : : : 
» 6a. Enlarged portion of surface. 
Limestone, Derbyshire, - Ez coll, Woodwardian Museum, Cambridge. 
Fic. 7. AsTEROPTYCHIUS ORNATUS, Aguss., j j : D 5 2 
, 7a. Transverse section of the spine. 
Limestone, Armagh, . 0 . Hx coll. Enniskillen Collection. 
Fic. 8 ASTEROPTYCHIUS ORNATUS, Agass., . 5 ° ° : : 
8 a. Enlarged portion of surface. 
Limestone, Armagh, . : . Lx coll. Enniskillen Collection. 
Fic. 9. ASTEROPTYCHIUS ORNATUS, Agass., P F 6 0 F ° 
9 a. Transverse section of the upper part of the spine. 
9 6. Enlarged portion of surface. 
”? 
PP) 
Carboniferous Limestone, Armagh, . Ex coll. Enniskillen Collection. 
Fic. 10. CompsacANTHUS CARINATUS, Davis, : 3 ; : : . 
, 10a. Transverse section of the spine. 
» 106. Portion of surface magnified. 
Limestone, Armagh, : ; . Hz coll. Enniskillen Collection. 
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