378 Zoological N. Y. Zoological Society. [1;19 



Kishinouye thus described the dental apparatus of his speci- 

 men: 



"The teeth are very minute and numerous. They are nearly 

 equal in size and shape. Each tooth is acutely pointed, laterally 

 compressed, and with an ellipsoidal root. The band of teeth on 

 the upper jaw is curved a little and at each end of the band 

 there is a detached group of teeth. The band on the lower jaw 

 is crescent shaped. In each band the teeth are arranged in a 

 great many transverse rows, about 300 in number. In the mid- 

 dle part of the band we count 16-30 teeth in one row." 



Bean says that the teeth of his Florida specimen are, " — in 

 lower jaw in fourteen longitudinal rows; in upper jaw there 

 are thirteen longitudinal and about three hundred vertical rows 

 of developed teeth." His figure of the upper jaw of the Ormond 



y/7/n. 



FIG. 131. TEETH OF ORMOND, FLORIDA. 



SPECIMEN (Enlarged). 



After Bean (1905). 



specimen is given herein as Figure 130, while Figure 131 is a 

 magnified view of three of these teeth. 



Last of all Lloyd found the teeth in his specimen to be small, 

 numerous, recurved, in bands in each jaw. Each band had 

 about 350 rows of teeth with about 10 teeth in each row, mak- 

 ing approximately 7,000 in all. 



Internal Organs. 



This shark has been dissected by Smith (1849),' by Wright 

 (1870), by Haly (1883) and recently by Van Kampen (1908). 

 Unfortunately, however, none of these authors, save Smith, 

 gives any account of the internal organs. Wright, who had 

 more specimens at his command than any other naturalist, did 

 practically nothing; and the same can be said of Haly and Van 

 Kampen. 



^Dum^ril's (1865) excellent accounf. of the internal organs is mainly 

 a translation of Smith's description. 



