288 



Annals of the Carnegie Museum. 



Dimensions. 



Distance from proximal extremity to distal extremity of posterior margin 287 mm. 



Distance from proximal extremity to distal extremity of anterior margin.... 223 " 



Antero-posterior diameter of proximal end 100 " 



Vertical diameter of proximal end 55 " 



Smallest antero-posterior diameter of shaft 45 " 



Verticaldiameter of shaft 30 " 



Greatest width of distal end 200 " 



Vertical diameter at posterior angle of distal margin 23 " 



Vertical diameter at anterior angle of distal margin 10 " 



□ □Da 



□ □ 



□ □ 

 an □□ * 



o □ □ □□ a 



□ □ □□ 

 CD □ CD CD 



D □ □ □□ ° 



□ □ □□ 



□ □ □□ 



O □□ □□ D 



□ □ □□ 



° □□ □ ED ° 

 a □□ CDUD a 



° acq CD □ o 



□ □ E3ED 



□ □ □□ 



Dnna 



□ □□□ 



o a 



a 



- 



lt'CERVlCAL 

 SERIES 



e'li'cERVICAL 



SERIES 



3^CERVICAL 

 SERIES 



The Scutes. 



Of the scutes representing the specimen there are twenty-five, which 

 are in fairly good condition, and numerous fragments of others. 



In a beautifully perfect skeleton of Crocodilus acutus floridanus before 

 me as I write I find that there are ninety-two osseous scutes entering 



into the dermal covering of the neck and back. 

 The anterior series forms a transverse row of 

 four scutes located immediately over and cover- 

 ing the spine of the axis ; the second series 

 consists of two transverse rows, the first made 

 up of four scutes, the second of two scutes, 

 and these overlie and cover the spines of the 

 third, fourth, and fifth cervicals. The third 

 series is composed of two scutes, covering the 

 spine of the sixth cervical. The spine of the 

 seventh cervicals is not shielded above by a row 

 of scutes; and the spine of the eighth cervical 

 is only partially covered by the first transverse 

 row of the dorsal series of scutes. The dorsal 

 series is made up of fifteen transverse rows of 

 scutes, each row composed of four or six bony 

 plates. Those containing six plates are the sec- 

 ond, the fifth, the eighth, the tenth, eleventh, 

 and twelfth rows, reckoning backward. The 

 fifteenth transverse row of scutes, overlies and 

 covers the spines of the third and fourth lumbar vertebrae. Follow- 

 ing the dorsal series of scutes terminating at the point just stated, 

 there are on either side, extending backward over the region of the 

 sacrum and the two anterior caudal vertebrae, six bony scutes dimin- 



DORSAL 

 SERIES 



ISAGRO-CAUDAL 

 SERIES 



Fig. 8. Diagram- 

 matic view of arrangement 

 of scutes on back of C. 

 acutus floridanus. 



