64 COPEIA 



It is worth noting, by the way, that the three 

 specimens showed nicely three successive stages in 

 the growth of the teeth in the hammer-head. In the 

 51 cm, shark no teeth had yet appeared in either jaw. 

 In the 56 cm. one, minute teeth could be felt by the 

 finger in the lower jaw, but none could be detected 

 in the upper. In the 60.5 cm. specimen, teeth were 

 well developed in both jaws and were from 1.5 mm.- 

 to 3 mm. in height. Since none of the three speci- 

 mens was embryonic, but all were free-swimming 

 young sharks, it follows that Sphyrna zygaena is 

 born toothless and that teeth make their appearance 

 when the shark is about 55 cm. in length. The teeth 

 then grow rapidly, reaching a length of 1.5 to 3 mm. 

 in height by the time the shark is 60 cm. in length. 



L. Hussakof, 



New York, N. Y. 



NOTES ON SOME FISHES FROM CHILI. 



Through the kindness of Dr. W. P. Wilson, I 

 have been enabled to examine some market-fishes 

 received from Valparaiso by the Commercial Mu- 

 seum of Philadelphia. Among them I found: 



Catulus chilensis (Guichenot), Squalus acan- 

 t Idas ; Linn., Raja lima, Peoppig, R. flavirostris, 

 Philippi, Callorynchus callorynchus (Linn.), Caras- 

 sius auratus (Linn.), Ophichthus ocellatus (Le 

 Sueur), Clupanodon sag ax (Jenyns), Ethmidium 

 coerulea (Valenciennes), Mugil cephalus, Linn., 

 Sarda chilensis (Valenciennes), Thyr sites atun 

 (Euphrasen), Seriolella violacea, Guichenot, Tra- 

 churus picturatus (Bowdish), Percichthys trucha 

 (Valenciennes), Paralabraw humeralis (Valencien- 

 nes), Isacia conceptionis (Valenciennes), Sciaena 

 fasciata (Tschudi), Aplodactylus punctatus, Valen- 

 ciennes, Chromis crusma (Valenciennes), Sebastodes 

 darwini (Cramer), S. chilensis, Steindachner, Ping- 

 uipes chilensis (Molina), Prolatilus jugularis (Val- 



