NO. 9 NEW RIVER-DOLPHIN FROM CHINA — MILLER 9 



maxillary notch, yy (48) ; breadth of beak between maxillary notches, 

 96 (no) ; breadth of beak half way between last tooth and apex of 

 maxillary notch, 55 {jj) ; breadth of beak at last tooth, 60 (62) ; 

 breadth of beak at middle, yj (35) ; breadth of intermaxillaries at 

 middle, 21 (27) ; greatest breadth of intermaxillaries proximally, 62 

 (64) ; interorbital breadth, 128 (144) ; breadth across maxillary 

 crests at level of posterior border of nares, 137 (96) ; glenoid breadth, 

 199 (223) ; median depth of braincase through prominence behind 

 nares, 125 (158) ; occipital depth, 114 (142) ; depth of rostrum at 

 level of last tooth, 34 (44) ; depth of rostrum at middle of toothrow, 

 21 (37) ; length of temporal fossa, no (153) ; depth of temporal 

 fossa, 80 (89) ; length of orbit, 45 (30) ; mandible, 471 (465) ; man- 

 dibular symphysis, 225 (268) ; coronoid-angular depth, 88 (113) ; 

 depth of mandible at level of last tooth, 35 (47) ; depth of mandible 

 at middle of toothrow, 24 (32) ; upper toothrow, 278 (312) ; lower 

 toothrow, 285 (315) ; largest upper teeth, height from base of 

 enamel, 8.6 (-), diameter at base of enamel, 5x7 (7.6x10.9); 

 largest lower teeth, height from base of enamel, 9 (-), diameter at 

 base of enamel, 5x7 (8x11). 



Cervical vertebrae of type. — Atlas: greatest breadth, 81.5 (84.1) ; 

 greatest median depth, 70.8 (67.5) ; breadth of spinal canal, 34.6 

 (28.9) ; median depth of spinal canal, 41.0 (39.5) ; depth of centrum, 

 15.8 (15. i) ; thickness of centrum, 17.3 (19) ;. articular surface for 

 condyle, height 40.3 (41.8), width, 32.0 (39.2). Axis: greatest 

 breadth, 93.3 (88.5) ; greatest median depth, 68.8 (76.5) ; breadth 

 of spinal canal, 27.6 (25.5) ; median depth of spinal canal, 24.6 

 (22.1) ; breadth of centrum, 39.3 (42.6) ; depth of centrum, 26.1 

 (34.6) ; thickness of centrum, 18.7 (22.8). Third cervical: great- 

 est breadth, 76.8 (75.6) ; greatest median depth, 57.0 (62.0) ; breadth 

 of spinal canal, 26.1 (21. i) ; median depth of spinal canal, 26.3 



(22.6) ; breadth of centrum, 36.2 (40.3) ; depth of centrum, 29.8 



(21.7) ; thickness of centrum, 12.0 (n.o) ; breadth of lateral canal, 

 9.0 (8.6) ; depth of lateral canal, 7.2 (7.2). Fourth cervical: 

 greatest breadth, 69.3 (67.5) ; greatest median depth, 51.6 (61.7) ; 

 breadth of spinal canal, 25.9 (22.0) ; median depth of spinal canal, 

 18.5 (19.8) ; breadth of centrum, 32.5 (36.8) ; depth of centrum, 30.0 



(37.8) ; thickness of centrum, 10. i (11.6) ; breadth of lateral canal, 

 9.6 (-) ; depth of lateral canal, 8.0 ( 10.7) . Fifth cervical : greatest 

 breadth, 61.4 (73.9) ; greatest median depth, 50.6 (61.6) ; breadth of 

 spinal canal, 30.6 (26.6) ; depth of spinal canal, 17.5 (17.6) ; breadth 

 of centrum, 32.7 (36.8) ; depth of centrum, 31.5 (37.5) ; thickness 



