40 



PEECEEDINGS OP THE NATIONAL MUSEUM 



VOL. 70 



difference in size between the right and left air passages was 

 osteological, but when 240862 had been cleaned it was surprising to 

 find that the size of the two orifices was the same ; so the discrepancy 

 was due to differences in the soft parts of the two sides. 



Kogia also has two respiratory sacs upon either side, and a number 

 of small, supernumerary pouches wliich may correspond to the 

 accessory sacs of Neomeris; but the structure of the blowhole is so 

 much more complicated in the former animal, with its spermaceti 



Dtt? KtSP. ShC\ 



/B\-OV^ UOVt 



KHT. KCCt^. ?>KC 



PO^T. KCCE.S. 5^C- 



OEtP Ht"3V\B.f;T.SI>vC 



Km. ^cc^S). s^o 



Fig. 14. — Transverse sections through the frontal region of neomeris : 



SECTION through DEEPER RESPIRATORY SAC AT LEFT ; YET DEEPER SECTION 

 AT RIGHT 



organ, that comparison without a specimen is hardly profitable. 

 The details of the blowhole of Balaenoptera are not illustrated, and 

 the description is not particularly clear, but it is gathered that there 

 is a single respiratory sac upon either side. Globioce'phala has three 

 pairs of sacs, but they are illustrated as being considerably different 

 from those of Neomeris. 



Alimentary tract. — The iips are rounded, leathery, and probably 

 incapable of independent movement because of the tough, fibrous 

 tissue beneath the integument. In the case of the juvenile at hand 

 the teeth have not yet appeared, but there is an alveolar sulcus pres- 

 ent. This sulcus still persisted in the immature females dissected, 



