190 CONTKIBUTIONS TO CANADIAN PALjIIONTOLOGT. 



The few specimens which have been collected at these localities are 

 here referred to the genus Belemnitella rathev than to Belemnites proper, 

 on account of their surface being marked with distinct vascular 

 impressions. They all consist of the posterior, fibrous portion of the 

 guard, broken off at greater or less distances behind the apex of the 

 phragmocone. As not a vestige of the alveolar border is preserved, it 

 is quite uncertain whether the anterior margin of the latter had a 

 straight fissure on its ventral side or not. 



The species seems to be readily distinguishable fiom the most nearly 

 related North American species, the Belemnitella bulbosa of Meek and 

 Hayden from the Fox Hills group of Dakota, by its much gi-eater size, 

 less slender proportions and by the different outline of its transverse 

 section at the larger end. 



Although in Meek's extended definition of the generic chai-acters of 

 Belemnitella,* the surface of the guard is said, perhaps inadvertently, 

 to be marked " on the ventral side by distinct vascular markings," yet 

 in d'Orbigny's original description of that genus the two lateral 

 vascular impressions are stated to be dorsal. 



AETHEOPODA. 

 CRUSTACEA, 

 CIERIPEDIA, 



LoEiouLA Canadensis. (N. Sp.) 

 Plate 26, figs. 4 and 4a. 



The foregoing name is proposed for the unusually perfect specimen 

 of a species of Loricula figured on Plate 26, which was collected by 

 Mr. J. B. Tyrrell, in 188Y, at South Duck Eiver, in Township 34, 

 Eange 23 W., from the Tort Benton group, or lower portion of the 

 series. 



Of the nine plates of which the capitulum was originally composed 

 no fewer than seven, viz., the carina, three of the four lateral plates, 

 (i.e., two on the under surface and one on the upper), one tei'gal plate, 

 and two of the scuta (the one on the under side nearly covered by 

 that on the upper) are preserved, more or less entire, in this specimen. 

 Most of one side of the scaly peduncle, also, is preserved, though the 

 whole of the exterior row of narrow plates immediately under the 

 carina is absent, and the posterior or pointed end of the peduncle is im- 

 perfect, most of the scales in that region being considerably displaced. 



The present species resembles the type of the genus, the L. pulchella 

 of Sowerby, vei-y closely in the number, shape and relative arrange- 



•Rep. U. S. Geol. Sarv. Terr., vol. IX., p. 502. 



