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Memoir Sears Foundation for Marine Research 



ones with 3 to 5 low ridges and the larger with 5 or even 7, the marginal teeth relatively 

 low and broad, mostly worn down in specimens seen, except in the cases of newly formed 

 denticles} pedicels moderately slender, on large basal plates. 



Head about V4 of total length. Snout moderately thick, its lateral outlines con- 

 verging gradually from opposite front of mouth to opposite ends of nostrils and then 



Figure 63. Carcharhinus limbatus, pictured in Fig. 62. A Lower view of head. B Pelvic fins. C Fourth 

 upper tooth. D Tenth upper tooth. E Fourth lower tooth. F Ninth lower tooth. C-F, about 5.4 x. G Right- 

 hand nostril, about 3 x. 



more abruptly j its tip rounded (relatively somewhat shorter and broader anteriorly 

 than in maculipinnis) , its length in front of a line connecting outer ends of nostrils nearly 

 % (63-65%) as great as distance between inner ends of latter, and its length in front of 

 mouth a little more than i V2 times as great as that, or about Vs as great as length of head. 

 Eye approximately circular, its vertical diameter about 0.9 the horizontal diameter, 

 the latter about Vs ( 1 7 to 20% ) as long as snout in front of mouth, or a little less in large 

 specimens. Gill openings relatively somewhat shorter than in maculipinnis, the ist only 

 about % as long as distance between inner ends of nostrils and 1.9 to 2.8 times as long as 

 horizontal diameter of eye, the 3rd a little the longest, the 5th oblique and a little more than 

 % as long as ist, the 4th over origin of pectoral. Nostril strongly oblique, its inner end 



