30 



The enlarged ridge scales are rugosely and irregularly striated longitudinally. Those 

 behind the dorsal fin are the best preserved in the specimen, and are seen to be toothed behind, 

 plate X, fig. 4. They have an elongated oval outline; and undergo a modification in shape on 

 the upper margin of the tail similar to that observed in the species of Elonichthys and Rhad- 

 inichthys already described. Conspicuous, horizontal striations or linear depressions occur in 

 these modified scales of the caudal ridge, plate X, fig. 5. 



The most distinctive character of the species is the style of ornamentation of the anterior 

 flank scales, which is different from that of any other of the Albert shales fishes, and, so far as 

 the writer is aware, from that of any species of the Palseoniscidse. 



The species is named after Dr. R. W. Ells, to whom we are indebted for the one and only 

 specimen known. This specimen constitutes the type of the species. 



Figure 1, plate XI, gives a fairly good representation of the type specimen twice the natural 

 size. 



Elonichthys elegantulus, Eastman. 



Elonichthys elegantulus, Eastman, 1908. Devonian Fishes of Iowa, Iowa Geol. Surv., vol. XVIII, 

 p. 274. 



Of this species Dr. Eastman, in the above report, writes as follows: — 



"A study of an extensive suite of material from the lower Carboniferous of Albert county, 

 New Brunswick, including the originals of Dr. C. T. Jackson's figures and descriptions, shows 

 that a minute form, apparently closely allied to the Scottish E. striatulus, is present in this 

 horizon and locality, where it accompanies E. hroivni and the several species of Rhadinichthys 

 already noticed in the preceding pages. The new form, for which the title E. elegantulus is not 

 inappropriate, may be readily distinguished by its small size, slender and graceful proportions, 

 and decidedly prominent, even coarse details of scale ornament. The scales are traversed 

 longitudinally by a number of closely crowded raised ridges, smooth, continuous, glistening, 

 and the whole presenting an appearance not distantly recalling Ptycholepis, from a much later 

 horizon. In addition, the lateral line is very conspicuous. The head and fin structures are 

 not clearly revealed in any individual that has thus far come to light, but the general resemblance 

 to the little fish made known by Traquair from Eskdale and East Lothian necessitates its refer- 

 ence to the same vicinity." 



This, the smallest, and, with R. alherti, the most abundantly preserved of the fishes at the 

 Albert mines, is readily recognized by its rugose scale markings. Its small size, in conjunction 

 with its generally imperfect state of preservation, leads one to suspect that it may be the young 

 of one of the species already known from this locality, possibly of R. alherti. Of the many 

 scores of specimens in our collections nearly all lack proper definition of outline, and the head 

 is, as a rule, very imperfectly preserved. Its principal characters, however, may be stated to 

 be as follows : In general outline resembling R. alherti, but much smaller. Length averaging 

 about 46 mm., or about half the length of R. alherti; considerably shorter than Canohius modulus 



