4 
PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 147 
A specimen from Plover Bay, Siberia, obtained in fall or winter (No. 
57977, Capt. C. M. Scammon, collector), agrees pretty closely with the 
La Paz specimen described above, but is decidedly more brownish-gray 
above, while the black of the jugulum extends farther up on the throat. 
Wing 3.50, tail 4. 
An example, from China, of what appears to be this species, differs 
from the two described above in the wing-markings, the middle coverts 
being dusky, tipped with white, the greater wing-coverts also dusky and 
narrowly edged with dull grayish, but without white, even at tips. The 
head-markings, however, are precisely identical, and it may be merely a 
a younger individual. Wing 3.70, tail 3.80. 
Mr. Seebohm’s M. blakistont is said to differ from WM. “amurensis” ( 4) 
only in having black lesser wing-coverts and white secondaries, these 
parts being, respectively, ash-gray and brownish-gray in JZ. “* amurensis.” 
Is it not possible, therefore, that M. blakistont merely represents the per- 
fectly developed plumage of the adult ¢ of M. “ amurensis” (=ocularis)? 
THE FIRST OCCURRENCE OF PSEUDOTRIACIS MICRODON, CA- 
PELLO, ON THE COAST OF THE UNITED STATES. 
By TARLETON H. BEAN. . 
The United States National Museum has just received, in the fresh 
state, a fine example of a species of Pseudotriacis, which came ashore 
at the Amagansett Life-Saving station on Long Island, February 8, 1883. 
This shark is the first result of a request by Prof. S. I’. Baird to the 
Superintendent of life-saving stations, Mr. S. I. Kimball, for information 
from points along the entire coast concerning the movements of marine 
animals and for the sending of such specimens to the National Museum 
as it may be desirable to possess. The example here described was for- 
warded by Mr. J. B. Edwards, keeper of the Suffolk life-saving station, 
February 12, 1883. 
No species of the genus Pseudotriacis has heretofore been recorded 
in the western Atlantic. The genus was first made known by Capello,* 
who had the single discovered species, P. microdon, from the coast of 
Portugal. A figure of the species is published in the journal referred 
toon Plate 5. An examination of the description and figure leaves no 
doubt in my mind that our example is identical with Capello’s species. 
Owing to the extreme rarity of this shark a full description and table 
of measurements may prove interesting. 
PSEUDOTRIACIS Capello. 
Body elongate ; mouth wide, with avery short labial fold around the 
angle; snout depressed, rounded, moderately long; nostrils inferior, 
near the mouth, but not confluent with it; eyes oblong, lateral, without 
*CAPELLO: Jorn. Sc. Math. Phys. e nat. Lisboa, t. I, 1868, p. 321, pl. V. 
