DESCRIPTION OF A NEW SPECIES OF 

 EUPROTOMICRUS. 



BY ROSA SMITH EIGENMANN, 



Euprotomicrus hyalinus. Type : One specimen .16 m. 

 Pacific Ocean. 



Very dark seal brown, the ventral surface definitely a 

 little lighter, the margins of the caudal and of both dor- 

 sal fins hyaline, the ventral fins wholly hyaline, the pec- 

 toral mostlv so, having the dorsal margin and a spot 

 posteriorly black and a narrow, black basal band; the 

 pectoral, ventral and caudal fins showing rays. 



Teeth of the outer series of the lower jaw 17. 



Base of first dorsal fin 5 in base of second, the dorsal 

 fin interspace one-fifth greater than base of second fin. 



Least height of caudal peduncle equal to vertical diam- 

 eter of orbit, 2 in horizontal diameter. Orbit i| in snout, 

 its posterior edge over the mouth. Vertical diameter of 

 spiracle li in vertical diameter of orbit. 



Pectoral fin 2 in head, truncate, broader at tip than at 

 base, which is about 2 in its length. 



Head 5| in the total length; depth 9. 



The specimen is in good condition, except that it has 

 been badly shriveled by strong spirits. It belongs to the 

 collection of the University of California, and was kindly 

 loaned to me for description by Mr. J. J. Rivers, the 

 Curator, who makes the following statement concerning 

 it: ^"The shark was given to me by Lieutenant F. A. 

 Gardner of the Pacific Mail Steamship GaeHc that runs 

 between San Francisco and China. It was stranded 

 upon the deck of the steamer, having been carried there 

 in a heavy sea. The locahty was between Honolulu and 

 San Francisco, but nearer to the former.'' 



'.'D Ser., Voi,. Ill, May 28. 1890. 



