BALJilNOPTEEA. 



555 



B. schlegeli, it differs from it materially in the character of its beak, which is long 

 and slender, and much more forwardly directed than the beak of B. schlegeli, and 

 also in the absence of the curvature of the external margin of the maxilla which 

 distinguishes B. schlegeli. The beak of the latter is also much more downwardly 

 shelving at its base than is the maxillary of this form from the Bay of Bengal, 

 and the skull has greater depth, as is shown by the circumstance that the orbital 

 process of the maxilla in B. schlegeli is below the level of the base of the skull, 

 whereas in this skull it is above it. The opening of the posterior nares also is much 

 narrower than in B. schlegeli. The length of this skull compared with the type 

 of B. schlegeli, is only about three inches longer, but notwithstanding the addi- 

 tional length it has less breadth and less occipital length associated with a shorter 

 maxilla, less maxillary breadth, and a narrower beak. Its lower jaw also differs 

 considerably in its length from that of B. schlegeli, being nearly 4 inches shorter, 

 although its skull is longer than the skull of that type, which, according to Professor 

 Flower's^ measurement, lias the lower jaw longer than its skull, whereas in Van 

 Beneden's and Gervais^ figure the lower jaw is represented as shorter than the 

 skull. The lower jaw of B. schlegeli is much deeper and heavier than the jaw of 

 this Whale, as is seen by the accompanying table of measurements, and the curve 

 also differs materially, the latter being much more outwardly curved than the former. 



Skull measurements of "B, schlegelii and of B. edeni. 2 



Length of skull, in straight line 



Breadth of condyles ........... 



„ of exoccipitals 



„ of squamosals (greatest breadth of skull) ...... 



Length of supra-occipital 



„ of articular process of squamosal ....... 



Orbital process, frontal length 



„ „ breadth at base 



„ ,, outer end .......... 



Length of beak from middle of curved border of maxillary to tip of premaxUlary 



„ of maxillary ........... 



Greatest width of nasal aperture 



Breadth of maxUlaries at posterior end 



„ of „ across orbital processes, following curve 



„ of beak at base, following curve 



„ of „ at middle .......... 



„ of maxillary, at middle ......... 



„ of premaxUlary, at middle ......... 



Length of lower jaw, in a straight line 



Height of „ „ at coronoid process 



„ „ „ „ at middle ......... 



Amount of curve of lower jaw 



B. SCHLE- 

 GELI. 



Java. 



Inclies. 



11600 



10-50 



41-00 



57-00 



29-50 



23-00 



22-00 



24-50 



1500 



82-00 



9000 



10-00 



11-00 



6.3-00 



42-00 



22-25 



6-00 



4-00 



117-00 



14-00 



9-50 



8-50 



B. EDENI. 



Sitiang. Arakan, 



Inches. 



118-75 

 8-75 

 34-25 

 53-00 

 26-50 

 23-50 

 29-00 

 22-00 

 18-00 

 77-50 

 84-? 



54-50 



33-00 



21-25 



6-75 



3-00 



113-25 



14-00 



7-00 



13-50 



Inches. 



124-50* 

 10-50 

 39-00 

 58-25 

 27-50 

 26-00 

 23-50 

 23 00 

 19-00 

 81-00 

 88-? 



62-00 



36-00 



23-75 



8-00 



11900 



15-30 



7-50 



14-50 



♦ Adding- on 6'60 inches for premasillaries. 



The lower jaw of this Whale has all the characters of the jaw of the Whale 

 described by Blyth as Balcenoptera indica, the rami having, as pointed out by him, 



1 Proc. Zool. Soc, 1864, p. 410. 



« I reproduce in this table the measurements given by Professor Flower of B. schlegeli and alongside of them 

 those of B. edeni by myself. 



