﻿COCCOSTEIDJS. 



307 



P. 5540. Plaster cast of a similar but more imperfect specimen, with 

 displaced median dorsal plate ; Thurso. The original is 

 also preserved in the Museum of Science and Art, Edin- 

 burgh. Presented by the Lords of the Committee 

 of Council on Education, 1888. 



Pig. 46. 



Homosteus milleri, Traq. — Outline of cranial and dorsal shield, by E. H. Tra- 

 quair, one-sixth nat. size, a, b, c, undetermined bones ; a.d.L, anterior 

 dorso-lateral ; a.e., ethmoid ; c, central ; e.o., external occipital ; m., mar- 

 ginal ; m.d., median dorsal ; m.o., median occipital ; o., orbit ; p.d.l., 

 posterior dorso-lateral ; jp.o., preorbital; jpt.e., pineal ; pt.o., postorbital. 



P. 698. Series of seven plaster casts of specimens in the Hugh 

 Miller Collection, Edinburgh Museum, five being figured 

 by Miller, op. cit. figs. 27, 28, 35, 39 ; Orkney. 



Egerton Coll, 



P. 699. Imperfect median dorsal plate measuring, in its broken con- 

 dition, 0-28 across; Orkney. Egerton Coll. 



P. 3227. Portion of dermal plate, showing stellate tubercular orna- 

 ment ; Orkney. EnnisJdllen Coll. 



x2 



