No. 1.] WHITEAVES — DEVONIAN FISHES. 33 



are not well shewn and the teeth are not visible. The scales of 

 the body, most of which are either split or broken at the edges, 

 average less than two lines in diameter. Besides the specimen 

 collected by Mr. Foord, another nearly perfect example of the 

 same species was obtained by Mr. Weston in Scaumenac Bay, 

 and both of these have been compared with specimens of G, 

 microlepidotus from the Old Red Sandstone of Scotland. The 

 characters of the Canadian and Scotch species certainly appear 

 to be very similar, but the few Scotch specimens accessible to 

 the writer shew only the general shape of the body of the fish 

 and the size and sculpture of its scales, the fins and tail being 

 entirely wanting. 



Glyptolepis. 



Two split nodules of shale which exhibit on their inner 

 surfaces a number of large detached scales, slender rib bones, 

 an operculum and a fragment of a jaw, with teeth, of a second 

 species of Glyptolepis, probably nearly related to the G. lepto- 

 pterus of Agassiz. The scales, which are nearly an inch long, are 

 sculptured with the wavy costae and semi-lunar or crescentic area 

 of backwardly directed points characteristic of the genus, and 

 the ribs are hollow in the centre. The teeth are short, conical, 

 somewhat compressed and perfectly smooth. 



Cheirolepis Canadensis. Sp. Nov. 



Maximum length eighteen inches: greatest height less than 

 one-fourth of the length : general outline elongate-fusiform. 

 Head equal to about one-fourth the entire length : cranial plates 

 exquisitely sculptured with delicate, irregular corrugations which 

 are crossed obliquely by minute ribs quite invisible to the naked 

 eye. In some of the cranial plates the corrugations consist of 

 wavy ridges of varying length, separated by corresponding but 

 much wider grooves. Occasionally the ridges appear to be made 

 up of a series of confluent tubercles. In other plates the corru- 

 gations or ridges anastomose so as to form a dense but irregular 

 network. Margin of orbital cavity circular. Teeth conical, 

 slender, of unequal size. Scales of the body minute, ganoid, 

 rhomboidal, about one-third of a line long, and sculptured with 

 acute ribs which radiate longitudinally from the posterior angle 



Vol. X. c No. 1. 



