SCANADINVIAN CETACEA.' 309 



eastern shore of that sea, not far from the mouth of the river Dwina. Dr. A. J. Malmgren, of 

 Finland, says that he has seen it in July, in 1856, in great numbers, in the White Sea, between 

 Kem and Solowetzkoi.i It may also probably exist in the sea near the coasts of East Pinmark. 



I will add to the description of the skeleton of Balanoptera rosirata, preserved here, that its 

 lingual bone is of the usual form peculiar to the species. Its corpus and cornua posteriora or 

 majora have the upper side concave and the lower convex, and the transverse measurement is 

 much larger than the longitudinal. The corpus is 6" long, and the distance between the points of 

 the hinder cornua or the width of the lingual bone is 1' 5". The corpus projects forwards with a 

 narrow notch, l^" deep, and has behind two obtuse tubercles, which are but slightly directed 

 backwards. At the sides it is united with the hinder cornua, without any limit or sutures. These 

 are rather long and tapering towards the point, and directed almost straight out from the sides of 

 the corpus, so that their hinder edges are almost linear, although slightly curved. Its anterior 

 edges slope somewhat backwards. The anterior cornua, which are large and in a straight line 

 lOi" long, are irregularly curved, with their fore edges concave and their hinder ones convex. 

 At the inner end, which is somewhat the thickest, they are each united by a long cartilage to the 

 projecting part of the corpus, at the sides of the notch. There are cartilaginous processes at the 

 external end of the anterior as well as of the posterior cornua. The anterior cornua, with their 

 processes, are, in the foetus, united between the lateral parts of the occipital bone and os petrosum 

 (Eschricht), and in older specimens probably united only to the former bone. 



^ " The sea there was literally thick with Limacina arctica, Clio borealis, Cydippe, Beroe, Medea, 

 &c., Ctenophoræ, and {Medusæ' Malmgren in letter). 



