1917.] NATURAL SCIENCES OF PHILADELPHIA. 127 



A SECOND COLLECTION OF FISHES FROM THE PANAMA CANAL ZONE. 



BY HENRY W. FOWLER. 



Air. David E. Harrower again visited the Canal zone in the summer 

 of 1916, and made a collection of marine fishes at Colon. These 

 have been purchased by the Academy. Two species appear to be 

 new and several others are interesting records. 



Sphyrna tiburo (Linne). 



Three heads, 128 to 162 mm. wide.. Also seven young, 160 to 

 245 mm. long. 

 Sphyrna zygaena (Linne). 



Two heads preservetl, 167 to 198 mm. wide. 

 Eulamia commersonii (Bbinvillc). 



A head of a slightly larger example than any identified as Eulamia 

 porosus, shows several characters not in agreement. The nostril 

 as seen in profile begins nearly midway in the length of the snout 

 and nasal valves with only very obtuse wide point at hind angles, 

 whereas in E. porosus the point is distinct and projecting. Each 

 mouth corner with a conspicuous though very short fold. Teeth 

 all very finely serrate. No pores on loAver internasal space as in 

 E. porosus, those above rictus and in postorbital region inconspicuous, 

 whereas in E. porosus the reverse obtains. 



Miller and Henle state^ "Maul schwach konvex." Their figure 

 of the lower view of the head does not show any distinct point to 

 the ends of the nasal lobes, and there is no indication of a fold at the 

 mouth corner. It also shows the space between the snout tip and 

 mouth about an eye-diameter greater than the space between the 

 outer nasal corners, which is not in agreement with my specimen. 

 The short labial groove at each mouth angle and the width of the 

 orbit half of space to nostril are points in agreement with my material. 

 Eulamia porosus (Ranzani). 



One example, 432 mm. long, and three heads. The first smallest, 

 and shows the no.strils in the last third of the snout, though in the 

 largest head only slightly more forward. The smallest shows the 

 mouth length f its width, while in the largest but little over half its 



1 Besch. Plagiost., 1839, p. 37, PI. 12. 



