1899.] NATURAL SCIENCES OF PHILADELPHIA. 327 



two-thirds times iu the total length (Philippi). The flesh is much 

 esteemed as food by the Chilean people. 



Range. — Peeasmayu bay to Juan Fernandez. \ 



3. Galeus dorsalis (Gill). 



MustelHs dorxidis Gill, Proe. Acad. Phila., 1864, 149 [Panama]. 

 Oaleus dorsalis Jordan and Evermann, Fishes of -North and Middle 

 America, i, 30, 1896. 



Local name, Cazon. 



The five specimens in the collection shoAV a most remarkable 

 color variation. Two of them have the typical silvery plumbeous 

 ground color, paler ventrally and slightly flecked with light spots 

 along the sides. The other three are transversely barred with about 

 sixteen rather broad black bands, extending across the back half- 

 way down on each side. There are five or six in front of the first 

 dorsal, the two anterior ones bounding the interorbital space. 

 These are not sex markings, as both sexes occur in each variety. 

 The most careful comparison and elaborate and accurate measure- 

 ments fail to reveal any other difference. The anal arises under 

 the posterior third of the dorsal, barely extending beyond that fin. 



The following measurements are in hundredths of the total 

 length and have been computed on the U. 8. Fish Commission's 

 proportional scale : 



Snout to origin of first dorsal 29-. 31 



Base of first dorsal 11-. 12 



Anterior margin of first dorsal. 12 



Distance between two dorsals 20-. 22 



Base of second dorsal 05- . 09 



Anterior margin of second dorsal 10-. 11 



Second dorsal to tip of caudal 30- . 32 



Distal lobe of caudal 07-. 09 



Anterior edge of ventral 07-. 09 



Anterior margin of pectoral 13-. 14 



Tip of snout to eye 08 



Eye 03 



Eye to origin of first dorsal 20-. 22 



Anal to tip of caudal 29 



Length 300-430 mm. 



Range. — Gulf of California, Panama, Callao. 



