HISTORY OF THE ICHTHYOLOGY OF NEW BRUXSWICK. 51 



^vater, the observer will be often surprised at the number 

 of these little denizens skulking there out of sight. In 

 the numerous streams and lakes of the province there 

 must be several species of this genus still unrecognized.^ 



U. gracilis (Heckel) Putnam. Miller's Thumb. 



This species is very slender, with the dorsal fins 

 edged with orange or red, a large mouth, and con- 

 cealed propercular spine. The maxillary reaches the 

 l^Lipil. In many respects it resembles both U. formosa 

 and U. boleoides, but can always be recognized by its 

 slender form. It was first reported by the writer from 

 Green River, Madawaska County, in 1894, where it is 

 associated with U. Richardsoni and V. boleoides. 



Coregonus quodrilaterials, Richardson. White Fish. 



This salmonoid is found in the river St. John above 

 the Grand Falls and in many of the lakes drained by its 

 tributaries. It is associated with its congener C. labra- 

 doricus Rich. ; but is inferior to the latter in quality of 

 flesh and size. As this is its first appearance in any JSTew 

 Brunswick list, a l)rief description is here given, taken 

 from specimens collected by Wm. M. McLean and the 

 writer in July, 1893. 



Body elongate, roundish, not much compressed. Dor- 

 sal aspect not appreciably arched, nearly straight from 

 nape to caudal ; ventral aspect curving both ways from 

 base of ventral tins. Head moderate, profile little 

 curved; snout ver}- narrow, pig-like, descending, ob- 

 liquely truncated, its tip on level with lower margin of 

 tlic orbit. Preorbital bone as wide as the pupil. Max- 

 illary, wide, short, not reaching the front of the orbit, 

 about four in head. Mouth inferior, small, with no teeth 

 on tongue. Gill rakers short and stout. Coloration : 

 Pale-bluish above, silvery below ; sides with dark punctu- 



* Since the above was written, the writer found U. gracilis in Green River' 

 Victoria County, which he has caused to Ije inserted above. 



