No. 4.— Reports on the Results of Dredging, wnder the Supervision 
of ALEXANDER AGASSIZ, on the Hast Coast of the United States, 
during the Summer of 1880, by the U.S. Coast Survey Steamer 
«“ Blake,’ COMMANDER J. R. Bartuett, U. 8. N., Commanding. 
(Published by permission of J. E. Hixcarp, Superintendent of the U. S. Coast 
and Geodetic Survey.) 
XXIII. 
Report on the Isopoda. By Oscan HARGER. 
Tux collection of Isopoda from the Blake Expedition, although small 
in number, is remarkable for the large proportion of interesting forms se- 
cured, since nearly all the specimens prove to belong to species that are 
either new, or not hitherto known from our coast, or to species known 
only from single specimens and hence only imperfectly described. 
CIROLANIDA. 
Cirolana spinipes Barr & WestTwoop. 
Plate I. Figs. 2-2d. Plate Il. Figs. 1-1c. 
Cirolana spinipes Bate & Westwoop, Brit. Sess. Crust., IL, p. 299. 1868. 
Specimens of this species, not hitherto récorded from our coast, were ob- 
tained from two localities ; viz. Station 316, Lat. 32° 7’ N., Long. 78° 37’ 
30” W., 229 fathoms, one female ; and Station 321, Lat. 32° 43’ 25” N., Long. 
77° 20’ 30’ W., 233 fathoms, three females and one male. 
These specimens appear to agree perfectly in all specific characters with 
others in the collection of the Yale College Museum identified and sent to the 
Museum by the Rev. A. M. Norman, from the Shetland Islands. They do, 
however, differ in some respects from the description of that species in Bate 
and Westwood’s work, and to facilitate comparison with that species and with 
others on our coast a full description is appended, with figures. 
The body is a little more than three times as long as broad, with the dorsal 
surface strongly rounded, polished and smooth except for minute punctations, 
mostly near the posterior margin of each segment, and a median dorsal row of 
shallow oval depressions, most distinct on the third, fourth, and fifth thoracic 
segments. 
VOL. XI. —NO. 4. 
