238 Proceedings of the Royal Physical Society. 



length of ten inches, but the others are for the most part much 

 smaller. The following definition was given in my paper in 

 the Quarterly Journal : " The body is comparatively slender, 

 the suspensorium is very oblique, the jaws are armed with a 

 row of incurved conical laniaries, outside which there is a 

 series of smaller teeth ; the principal rays of the pectoral fin 

 are as in Pygopterus and Oxygnathus, unarticulated till to- 

 wards their terminations. The dorsal is situated rather far 

 back, nearly opposite the anal, and the caudal body-prolonga- 

 tion is comparatively delicate." 



Besides including in Rhadinichthys the Palceoniscits ornatis- 

 simus and P. carinatus of Agassiz, and the P. Wardi of 

 Young, I also directed attention, as probably belonging to the 

 same genus, to the P. Alherti of Jackson, and more especially 

 to his P. Cairnsii and some of the other smaller Palceoniscidce 

 figured but not described by the same author from the Car- 

 boniferous strata of New Brunswick. And in a paper, read a 

 few weeks later before the Koyal Society of Edinburgh,* I 

 gave descriptions of seven species of Rhadinichthys from the 

 Lower Carboniferous rocks of the east of Scotland, including, 

 besides the Agassizian species, R. ornatissimus and R. carinatus, 

 five others new to science, namely, R. ferox, R. brevis, R. 

 Upturns, R. Geikiei, and R. tenuicauda.'f 



Eecently also Principal Dawson of Montreal has described 

 another species from New Brunswick, which he thinks may 

 probably be the same as that represented in PL II., fig. 5, of 

 Jackson's work, J but not named. To this species he gives 

 the name of " Palceoniscus (Rhadinichthys) modulus," and 

 makes the following observation concerning it : " This beauti- 

 ful and elaborately-ornamented little fish is a perfect model in 

 miniature of that type of Lower Carboniferous Palseoniscids 

 to which it belongs, and which has recently been separated by 

 Dr Traquair in the genus or subgenus Rhadinichthys." 



Here Principal Dawson seems either to disapprove or to 



* "On New and Little Known Fossil Fishes from the Edinburgh District, 

 No. III." ("Proc. Royal Soc. Edinburgh," 1876-77). 



f " Lower Carboniferous Fishes of New Brunswick " {Canadian Naturalist^ 

 voL viii., No. 6, 1877). 



X Report on the Albert Coal Mine, New Brunswick. 



