132 



BAL^NOPTERID^. 



with a compressed slender process below the condyle. The humerus 

 short, thick ; the forearm-bones broad, compressed, rather longer 

 (about one-third) than the humerus. 



Fig. 21. 



Third cervical vertebra, lower jaw, blade- and breast-boue o? Eschrichtius 

 robtisttfs. (From drawings by Professor Lilljeborg.) 



Professor Lilljeborg refers these bones to the genus Balamoptera, 

 because the blade-bone has a well-developed acromion and coracoid 

 process as in that genus, and because they are not developed in 

 Megaptera longhnana ; but the acromion is partially developed on 

 the blade-bone of J/. Lalandii from the Cape, and there is no reason 

 why it may not be more developed in another species allied to it. 

 He says, " it is distinguished from D. lomjimana by the strongly 

 developed acromion and coracoid process on the blade-bone." 



I am induced to refer it to Mcyapterina on account of the form of 



