100 
110 
120 
130 
140 
150 
160 
170 
UNIV, CALIF. PUBL. ZOOL, VOL. 14 
H-5289 H-5288 
(4977) (4978) 
H-5129D 
H-5287 H-5286 H-5285 
(4979) (4980) (4981) 
H-5305 H-5306 H-5307 
(5008) (5007) (5006) 
H-5304 H-5302 H-5301 H-5300 H-5298 
(4974) (4972) (4971) (4970) (4968) 
H-5312 H-5313 
(5004) (5001) 
Ce 
Se 
H-5308 H-5309 H-5310 H-5311 
(5005) (5004) (5003) (5002) 
Fig. 7. Diagram showing proportions of nitrogen in bottom samples. 
(SUMNER, ET AL,] PLATE 7 
H-5129 B H-5129C H-5129D 
D-5848 A 
D-5847 A 
