BEAKED WHALES, FAMILY ZIPHIID^ TRUE. 



53 



rostrum rather blunt, deeper than wide opposite distal ends of maxillae; all the bones 

 anchylosed together, but some of the sutures indicated by grooves. Rudimentary 

 alveolar groove nearly obsolete. (PI. 17, fig. 2; pi. 19, fig. 2; pi. 21, figs. 1, 5.) 



Rami of mandible anchylosed together at symphysis, the suture indicated 

 only by a groove. Teeth large, broadly conical and tapering at the tip. Root 

 very short, rugose, conical and closed; diameter 29 mm. (PI. 22, fig. 2; pi. 23, 

 figs. 2, 3.) 



The dimensions of the several skulls are as follows: 



Dimensions of ten skulls of Ziphius cavirostris {including the types of Z. grehnitzkii Ctejneger and 



Z. semijunctus Cope). 



Measurements. 



Totallength 



Length of rostrum 



Height from vertex to inferior 



border of pterygoids 



Distance from tip of rostrum 



to posterior free margin of 



pterygoids (median) 



Distance from the same to an- 

 terior end of nasals 



Breadth between centers of 



orbits 



Breadth between zygomatic 



processes 



Breadth between temporal 



fossBP. 



Breadth of rostrum at base — 

 Breadth of rostrum at middle. 

 Breadth of premaxillae at 



same point 



Depth of rostrum at middle 



Breadth of premaxillae in 



front of nares 



Greatest breadth of anterior 



nares ' 



Greatest length of temporal 



fossa 



Greatest depth of temporal 



fossa 



Length of orbit (ant.-post.) 



Distance from anterior end of 



orbit to maxillary notch 



Length of tympanic bulla 



Breadth of tympanic bulla 



Length of mandible 



Length of symphysis 



Depth of mandible at coronoid 



83991. 



Ber- 

 ing Is- 

 land. 



greb- 

 niUkii. 



900 

 491 



617 



495 



511 



270 

 319 

 102 



54 

 66 



176 



74 



161 



81 

 131 



21248. 



Ber- 

 ing Is- 

 land. 

 grely- 

 nitzkii. 



22874. 



Ber- 

 ing Is- 

 land. 

 greb- 

 niuiii. 



mm. 

 877 

 480 



670 



621 



513 



513 



309 

 331 

 117 



67 

 81 



73 

 133 



769 

 170 

 153 



21246. 



Ber- 

 ing Is- 

 land. 

 greb- 

 nitzkii. 



20993. 



Ber- 

 ing Is- 

 land. 

 Type 

 greb- 

 nitzkii. 



Ttlrfl. 

 «397 



"538 

 i>499 



325 

 345 

 1>94± 



58 

 80 



77 

 132 



771771. 



850 

 470 



600 



488 



505 



300 

 324 

 107 



205 



90 



149 



79 

 1.30 



70 



771771. 

 963 



550 



735 



690 



563 



573 



349 

 380 

 120 



78 



lis 



221 



98 



1.52 



87 

 137 



S3 

 53 

 24 



22069. 



Ber- 

 ing Is- 

 land. 

 grfb- 

 nitzkii. 



21245. 



Ber- 

 ing Is- 

 land. 

 greb- 

 nitzkii. 



771771. 

 882 



480 



682 



623 



li486 



531 



317 

 337 

 109 



70 

 117 



230 



103 



140 



74 

 126 



771771. 



855 

 476 



4S1 



673 



589 



492 



530 



311 

 320 

 112 



75 

 113 



219 



108 



146 



89 

 117 



85 



Type 



semi- 



junc- 



tui. 



771771. 



797 

 463 



349 



614 



590 



393 



415 



242 



249 



83 



44 



50 



128 



70 



1.33 



67 

 113 



61 

 54 

 37? 

 679 

 149 

 133 



20971. 

 Bame- 



gat, 



N.J. 



Fe- 

 male, 



cavi- 

 rostrii. 



771771. 



945 

 550 



735 



708 



476 



503 



302 

 307 

 112 



62 



77 



176 



76 



143 



80 

 134 



49599. 

 New- 



Male, 



cavi' 



rostTU. 



771771. 



915 

 514 



726 



530 



548 



313 

 337 

 113 



80 

 107 



234 



112 



155 



76 

 132 



99 

 55 

 25 

 842 

 176 

 153 



o About 150 mm. lacking from end of beak. 



li A little abraded. ,„ , , . . 



c Taken on a level with the curve of the itmer margin of the premaillte. Is only approximate. 



