140 SPECIMENS OF CETACEA. 



Species Undetermined. 



1. Occipital bone, probably of a young Balajnoptera. Diameter 



from anterior lip of foramen magnum to vertex border 

 22i inches, greatest transverse diameter 29 inches ; 

 foramen magnum 4 inches in sagittal, 3^ inches in 

 transverse diameter ; basi -occipital joint open. 



2. Vertebrae, Cervical, and five anterior Dorsal. The 



cervicals from 1st to 6th fused into one block, 7th 

 free, with costal articular facet on side of body, but 

 not on transverse process. Dorsals free, with articular 

 facet on side of body and tip of transverse process. 

 Atlas, transverse diameter 12;^ inches, supero-inferior 

 5^ inches. From New Zealand, 1872 ; also the succeed- 

 ing specimens, Nos. 3, 4. Donor — Sir James Hector. 



3. Vertebrae, Cervical, and two anterior Dorsal, similar in 



character to above. 



4. Vertebrae, Cervical, and two anterior Dorsal, similar in 



character to above. 



5. Brain of a large Cetacean, membranes removed and the 



s^'stem of small convolutions exposed. The optic 

 commissure with its nerves, and the nerves which 

 arise from the pons and medulla, have been dissected. 

 The brain shows the characi^eristic compression ; the 

 sagittal diameter of a hemisphere is 5^ inches, and the 

 breadth of the two hemispheres is 8i inches. 



6. Brain of a Cetacean ; the arachnoid and pia have not been 



removed. The sagittal diameter of a hemisphere is 

 5f inches, and the greatest transverse diameter of 

 the two hemispheres is 7f inches. 



7. Penis. Dried specimen 4 feet 10 inches long, bulbous 



and 8| inches in girth at the deep end, gradually 

 tapering to a point at the free end. The specimen 

 was originally in the University Museum of Natural 

 History, and is probably that described in the 

 Auetarium Muswi Balfouriani, e Musceo Sibbaldi- 

 ano, Edinburgh, 1697, as " Penis Balainaj Orcadensis. 

 The Pisle of a Whale which came in at Orknay," 



8. Foetus, male, of a Cetacean, species undetermined ; length 



4| inches. Dorsal fin about midway between the 

 head and the end of the tail. 



