WHITEAVES.J CRETACEOUS FOSSILS FROM MANITOBA. 191 



ment of the capitular plates and scales on the peduncle, as well as in 

 the surface markings of the former, but it seems to differ materially 

 from L. pulchella in its much smaller size and more narrowly subfusi- 

 form lateral outline, while the scales of its peduncle appear to be move 

 obliquely disposed and not at all curved. In the figure of L. pulchella 

 in Darwin's Monograph on the British Fossil Cirripedes (published by 

 the Palseontographical Society), which is stated to be of natural size, 

 the maximum height of the entire organism is twenty-six millimetres 

 and a half, and its greatest breadth sixteen mm. and a half. The 

 greatest breadth of the specimen collected by Mr. Tyrrell is seven 

 millimetres, and although its exact height cannot be accurately 

 ascertained, it may be approximately estimated at fourteen, or perhaps, 

 fifteen mm. 



Judging by woodcut 721 a. on page 536 of the second volume of 

 Zittels' " Handbuch der Pateontologie," the present species would seem 

 to be more nearly related to the L. Itevissima of Zittel, from the upper 

 chalk of Westphalia, than to L. pulchella. 



A few isolated capitular plates of L. Canadensis were also collected 

 by Ml-. Tyrrell in 1887, at the Vermilion Eiver, in Township 24, 

 Eange 20 "W., from the Fort Benton group, or lower part of the series. 



FISHES. 



SELACHII. 



Pttchodus parvtjlus. (N. Sp.) 



Plate 26, figs. 6, 5a and 6b. 



Tooth (in the only specimen known to the writer) very small for the 

 genus : the crown conical, with obliquely compressed sides, its maxi- 

 mum height being about equal to its breadth at the base, though, as its 

 apex is somewhat worn down from use, its original height may have 

 slightly exceeded its breadth. Outline of the base of the crown, as 

 viewed from above, somewhat quadrangular and much longer than 

 broad, but its posterior end is deeply excavated in the centre and pro- 

 duced on both sides into a small and short process, which expands 

 slightly outward and is truncated and minutely grooved at its termi- 

 nation. Lateral outline of the base of the crown, shallowly concave : 

 characters of the root unknown. 



At the anterior end of the ci-own there is a triangular smooth space, 

 but the rest of its surface is marked by corrugations or ridges, which 

 appear to have crossed the summit and posterior end continuously. At 

 the posterior end the continuity of three of the corrugations or ridges. 



