264 THE ICE AGE IN CANADA. 



Balanus baianoides. 



Fossil Portland, Maine. Not yet in Canada. 

 Eupagurus Bernharclm ? Fabricius. 



Fossil Riviere-du-Loup. A small specimen in a Tiirfitella may be 

 the young of this common species. 



Hyas coarctata. Leach. 



Fossil Riviere-du-Loup. A few claws only found, but evidently 

 of this common Gulf of St. Lawrence species. 



Esthfiria Dawsoni. Packard. 



Fossil Green's Creek, Ottawa. 



A new species found in the nodules containing fishes, c., and 

 described by Packard as follows* : 



This Estheria is entirely unlike any northern American or European 

 species, differing decidedly from Estheria morsei or E. caldwelli and 

 E, clarkii. It rather approaches E. jonesii from Cuba in the form of 

 the shell and style of marking of the valves. It does not resemble 

 closely any of the fossil forms figured in Jones' Monograph of Fossil 

 Estherise. The markings, however, present some resemblances to 

 E. middendorfii Jones, but differs in the want of anastomosing cross 

 wrinkles between the ridges. 



One valve and portions of others were preserved ; but none of them 

 show the beaks (umbones), though the form of the remainder of the 

 shell indicates that they were situated nearer the middle of the valve 

 than usual i.e., between the middle and the anterior third of the shell. 

 The shell is deep, probably more so than in E. jonesii, though the valves 

 have evidently been flattened and somewhat distorted by pressure, but 

 apparently the head-end was more truncated than in E. jonesii, as the 

 edge of the shell and the parallel lines (or ridges) of growth along the 

 head-end are, below, bent at right angles to the lower edge of the shell. 

 The raised lines of growth are very numerous and near together ; they 

 are of nearly the same distance apart above, near the beaks, as on the 

 lower edge. The very numerous lines of growth are thrown up into 

 high sharp ridges, the edges of whieh are often rough, finely granu- 

 lated, and often the valleys between are rugose on the surface. In one 

 or two places a row of papillse for the insertion of spinules may be seen 

 where the shell has been well preserved, and between many of the lines 

 of growth there are irregular superficial ridges. Length, 10 mm. ; 

 depth, 7.5 mm. 



* American Naturalist, June, 1881. 



