36 Bulletin 41, United States National Museum. 



40. CAttCHAKHINUS PLATIRHYNCHUS, (Gilbert). 



Snout moderate, not pointed, very flat, and broadly rounded ; its lengtli 

 from mouth slightly greater than -width of mouth, and less than width of 

 snout oi)])osite nostrils. No labial folds ; nostril flap without acute lobe; 

 upi)er teeth broadly triangular, coarsely serrate, the inner edge oblique, 

 the outer more or less detinitely notched; lower teeth narrow, erect; eye 

 moderate. Pectorals little falcate, long, reaching beyond base of tirst dor- 

 sal, the fin about \ as broad as long ; first dorsal inserted close behind pec- 

 toral, its distance from pectoral | its base; its base 2^ times in interspace 

 between dorsals, and less than its height, which is less than depth of body ; 

 second dorsal inserted over anal, its base 3 in first dorsal, the fin smaller 

 than anal; caudal ?>\ in total length. Light gray, the fins colored like 

 the body. Magdalena Bay to Galapagos Islands ; probably not rare. Re- 

 sembles C. himiella, from which it differs in dentition and in position of 

 first dorsal. (n?iari'g, Hat; f)vyxoCj snout.) 



Eiilamia phili/ilii/iichxK, Gilbf.rt, rroc. U. S. Nat. Mus., 1891, 544, Clarion Island, Socorro 

 Island, Magdalena Bay. 



41. C'AKCHAKHINUS FALCIPOKMIS, (Bibron). 

 (Cazon de Playa.) 



Snout moderately prolonged and acute ; nostrils w^ithout lobe ; first 

 dorsal rather backward ; second dorsal and anal opposite each other and 

 of medium size ; pectorals not twice as long as broad ; upper teeth with a 

 marked reentrant angle on the outer border; 2 pores on the nape, well 

 marked. Color, blue-black, deeper than in any other species. L. 10 feet. 

 (Poey.) Cuba and neighboring waters. (/«/x, scythe; forma, form.) 



CarcharinsfalciformUi, Bibhon, in Miiller & Heule's PlagioSiomen, 47, ISDS, Cuba, 

 S(jnahis liburo, PoKY, Meniorias, II, 331, 18G1, Havana. 

 Plati/jxnlon falciftjrmis, PoEY, Enumuratio, 191, 1875. 



42. CARCHAUHINI'S ACRONOTUS, (Poey). 



Close to C.falciformis, but with an acute lobe to the nostril ; first'dorsal 

 farther forward ; the second dorsal and anal larger ; pectoral scarcely 

 falciform; nuchal pores inconspicuous; color yellowish brown. (Poey). 

 Cuba. (fiKpof, sharp ; 7'(jrof, back.) 



Sqnalns acronohis, PoEY, Memorial, ii, 335, 18G1, Havana. 



43. CARCHARHINUS PEREZI, (Poey). 



Snout rounded, its length from mouth t width of mouth, and about 

 equal to length of mouth (measured from the line connecting the 

 angles) ; teeth oblique, with a deep notch on outer margin ; lower teeth 

 narrow ; Nostril with a small, sharp lobe. Pectoral falciform, rather 

 large. First dorsal acute, inserted near tip of pectoral ; anal opposite 

 second dorsal, which has a base nearly l as long as that of first dor- 

 sal. Gray, tips of fins dusky. Cuba. (Named for Don Laureano Perez, 

 of the University of Madrid.) 



Plalypodon pered, Poey, Enuuieratio, 195, 1875, Cuba. 



