This note is tho fullilment of a promiso which in the 

 aiitumn of 1871, at the rctjiicst of inv fricnds Prof. W. H. 

 Flower and K. Scott, Esq., I made to examine for Prof. A. 

 E. Nordenskiöld sonie fossils colleeted by liini in 18(i4 and 

 1868 chiefiv at Saurie Hook, Jce Fjord, from rocks, which in 

 a »Sketcli of the Geology of Spitzbergen», translated from the 

 transactions of the Royal Swedish Academy of Sciences, he 

 calls triassic. / 



Mest of tliem are too fragmentary for exact determina- 

 tion — manv are short pieces of ribs fiiited lougitudinally as 

 are those of Iclithyosaiiri and Plesiosauri — but a few are less 

 iniperfect, and these have principally engaged my attention. 



Those, which J can certainly refer to known genera, re- 

 present an Acrodus, and two Ichthyosaiiri, a large and a 

 small one. Besides these there are fragments of three jaws 

 — one of these has a more lish-like than reptilian aspect, 

 another may belong to the lesser Ichthyosaurus, and upon the 

 third 1 cannot form an opinion. 



Ichthyosaurus polaris. 



The remains, which with certainty are referable to the 

 Genus Ichthyosaurus, indicate a large and a &mall species. The 

 larger, for which I propose the speciiic designation polaris, is 

 represented by two series of vertebra», with which are so closely 

 associated fragments of ribs of commensurate size, that there 

 can be no reasonable doubt, that they belonged to the same 

 iudividiial. The ribs do not offer any unusual featnres. One 

 series of vertebra3 (I. a.) consists of 8 consecutive centra still 

 in natural apposition i-mbcdded in a large septarian nodide, 

 which with nts coutents is too much fissured to allow of their 

 complete extrication without risk. Portions oi' their ueural 

 arches are still connected with six of these centra, from the 

 3rd to the ()th inclusive. The outline of the 8th centrum, 

 which alone is fuUy ex])OSed, rcscndjles rougldv that of a 



