PRISTIS MICRODON. 265 



Among synonyms, heretofore cited, Belon figures a rostrum that may have 

 belonged to P. pectinatus ; Rondelet places a saw, possibly of P. pristis, on the 

 snout of a cetacean, and anything definite from Willughby Ray, Artedi, the 

 Fauna Suecica, the Mus. Ad. Frid., or the Systema, may be credited to Clusius. 



Mediterranean Sea and Atlantic. 



Pristis microdon. 



Plate 55, fig. 3; Plate 64, fig. 2-3. 



Galeus sp. Klein, 1742, Hist, pise, miss., 3, p. 12, pi. 3, f. 1-2. 



Pristis microdon IjATHAM, 1794, Trans. Linn. soc. London, 2, p. 280, pi. 26, f. 4; Bleeker, 1852, Verb. 



Bat. gen., 24, p. 54. 

 Pristis perotteti Muller& Henle, 1841, Plagios., p. 108; Dumeril, 1865, Elasm., p. 474, GtJNTH., 1870, 



Cat. fishes Brit, mus., 8, p. 436; Day, 1878, Ind. fishes, p. 729, pi. 91, f. 1; Jord. & Everm., 1896, 



Bull. 47, U. S. nat. mus., p. 60; Annandale, 1909, Mem. Ind. mus., 2, p. 6. 

 Pristis zysron Bleeker, 1852, Nat. tijds. Ned. Ind., 3, p. 441. 

 Pristis antiquorum Costa, 1854, Fauna reg. Nap., pesc, 3, pi. 8-9. 

 Pristis zephyreus Jord. & Starks, 1895, Proc. Cal. acad. sci., ser. 2, 5, p. 383; Gilbert & Starks, 1903, 



Mem. Cal. acad. sci., 4, p. 14. 



Rostrum tapering like that of P. pristis; rostral teeth 17-22 pairs, rather 

 distant from one another, grooved behind to form two cutting edges of which 

 the lower is more prominent. Teeth on the jaws in ?§ rows, in pavement. 

 Pectorals extending forward between the first gill opening and the jaws, Plate 64, 

 fig. 2-3; outer angle nearly a right angle, hind margin concave, angle produced. 

 Dorsals rather large, of equal height, hind angles produced; origin of the first 

 dorsal more than half the length of the base forward from those of the ventrals; 

 second shorter in base and in total length, not reaching the caudal. Supra- 

 caudal pointed; subcaudal with a small lobe. 



Tropical seas, entering the rivers. 



Klein's figures do little more than place the dorsal with regard to the xen- 

 trals and to show the caudal lobe. Latham's figure represents only the rostrum. 

 The measures given by Latham do not appear to be correct; they do not accord 

 with his statement "corpus ut in congeneribus." If the snout measured 10 

 inches, the distance from its bases to that of the pectoral 4, the distance "be- 

 tween the pectoral and ventral fins 6," and the total 28 inches, the measure- 

 ments must have been taken from a form differing so greatly from that of either 

 of the other species, in the shortness of the tail (8 inches) and in the length of 

 the body between pectorals and ventrals, that the differences could hardly have 

 passed unnoticed. Comparing a specimen of this species, the form of which 

 agrees with that of others of the genus, the snout of which measures 10 inches 



