REVISION OF CARCHARHINID SHARK GENERA — SPRINGER 605 



Table 12. — Frequency distribution of precaudal vertebrae number in 

 Rhizoprionodon terraenovae and R. porosus 



R. terraenovae 

 Bay of Fundy 

 New Jersey 

 Maryland 

 Virginia 

 North 



Carolina 

 South 



Carolina 

 Georgia 

 Florida 



East Coast 



Keys 



West Coast 

 Alabama 

 Mississippi 

 Louisiana 

 Texas 

 Yucatan 



58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 



1 



1 



1 1 



3 1 



1 



1 3 

 - 1 



1 



Total 



10 16 16 



R. porosus 

 Bahamas 

 Cuba 

 Jamaica 

 Hispaniola 

 Puerto Rico 

 Virgin Islands 

 Martinique 

 Grenada 

 Honduras 

 Panama 

 Venezuela 

 Brazil 

 Uruguay 



1 



1 2 

 1 



2 1 

 2 

 4 



2 2 



2 2 4 4 3 5 1 1 - 

 _ - 1 _ - _ - - 1 



Total 



2 3 5 7 



7 6 11 2 



fathoms, USNM 196267 (1 : 843) ; Sanibel Island, San Carlos Bay, SU 

 36077 (1 : 344) ; Clearwater, ANSP 40041 (1 : 381) ; St. Marks, USNM 

 92231 (1: 345); Apalachicola Bay, near West Pass, USNM 125767 

 (1: 348), USNM 125764 (1: 337); Pensacola, USNM 30814 (1: 284, 

 embryo), USNM 30706 (1 : 545; 2 embryos: 280 and 292). Alabama: 

 Mobile Bay, USNM 125873 (1: 329). Mississippi: Gulf coast, 

 USNM 147773 (1 : 492) . Louisiana : half mile off Grand Isle, USNM 

 127127 (1: 647), USNM 127128 (1: 555), USNM 127129 (1: 549); 

 two miles southeast of Grand Isle, USNM 127119 (1: 557). texas: 

 Harbor Island, USNM 127105 (1: 827); Galveston, USNM 116451 

 (13: ca. 299-ca. 374), USNM 116448 (5: 341-390), USNM 121618 

 (4: 227-341); Brownsville, USNM 171765 (3: ca. 275-ca. 285, em- 

 bryos). MEXICO: south of Alacran Reef, one and a half miles off 

 Yucatan, USNM 160830 (1: 810). 



