CANADIAN FOSSILS. 29 



EUNEMA. 



The typical species may be considered E. strigillata, which has an 

 elongate form, and the striae bent forwards below the sinus ; while 

 there are others with the lines of growth vertical below, or scarcely 

 at all brought forward. These latter connect it with the Cyclonema, 

 but have still the produced mouth and more turrited form, which 

 gives them the aspect of Murchisonia. 



E. STRIGILLATA, N. Sp. 



Plate VI. Figure 4. 



E. turbinata, elowgata, anfractibus 6 obliquis, soepe vagis : carinis tribus 

 cequidistantibus, superiori ad suturam, secunda supra medium posilis ; 

 cunctis a striis asperis dichotomisque decussatis ; ore ovato. 



This beautiful shell is quite abundant at Pauquette's Rapids, and 

 many finely-weuthered specimens shew the characters well. It is a 

 thin shell, and the striations of the surface are remarkably sharp, 

 prominent, and regular. 



Shell elongate, turbinate, of about six rather oblique whorls, the 

 last sometimes free. There are three prominent ridges on each 

 whorl, the principal one placed much above the middle of the body- 

 whorl, the upper one near the suture, the lower at an equal distance 

 below the median keel. All are crossed by equal, sharp, close, 

 thread-like ridges of growth, which tend about 60° backward to the 

 principal keel, where they are sharply bent, and proceed a little 

 forwards over the sides and base ; the open angle of the notch so 

 formed is about 130°. They bifurcate regularly between the upper 

 and middle keel, and re-unite in pairs upon the base, which is 

 produced. The mouth is oval, a little pointed above, and below 

 somewhat effuse. There is no umbilicus, and the inner lip is not 

 reflected or pressed closely against the columellar base, which has 

 a slight angle upon it. 



Locality. — Pauquette's Rapids. 



