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



Of the second Florida specimen, Mr. Brooks says that while 

 fresh : "The color was rather a mouse color, covered with yellow 

 spots two or three inches in diameter, which were generally 

 located in parallel lines of yellow, running from the backbone 

 down each side. Underneath the color was yellow." In this 

 connection see the various figures reproduced from the photo- 

 graphs loaned me by Mr. Brooks. These show the markings, 

 especially in the region of the first dorsal fin, admirably. 



After reading the above descriptions of the marked colors of 

 these various specimens, one wonders why so eminent an ichthy- 

 ologist as C. Tate Regan should say (1908) : "As a rule the 

 pelagic forms (. . . . Rhino don) . . . . have no conspicuous 

 markings." 



Jaws and Teeth. 



The jaws are enormously large, the teeth almost microscopic- 

 ally small. Smith, the discoverer of the fish, says in his first 

 paper (1829) : "Teeth short, slender, gently curved, so disposed 

 in longitudinal rows that they have the form of a band in the 

 front part of the maxilla, and likewise in the similar part of 

 the mandible." 



Miiller and Henle were the first scientists to examine Smith's 

 specimen after its deposit in the Museum of Paris. Of it they 

 say (1841) : "Teeth extraordinarily small, conical, very nu- 

 merous, card-like in arrangement. The conical teeth, with 

 points somewhat curved backward, were in a 15^/^ -foot speci- 

 men scarcely a line (1/12 inch) long. They stand in 12 to 15 

 rows one behind another, about 250 to a row." Their figure of 



FIG. 128. TEETH OF Rhinodon typicus. 



As represented by Muller and Henle. 



After Bean (1905). 



the teeth is given herein as number 128. This is from their plate 

 35 which also contains a semi-diagrammatic section of the tooth 

 band. This contains fourteen rows, each having 19 teeth. Four- 

 teen rows with 250 teeth to a row would give a total to each 



