No. 7. — Reports on the Results of Dredging, under the Supervision 
of ALEXANDER AGASSIZ, in the Caribbean Sea, in 1878, 1879, and 
along the Atlantic Coast of the United States, during the Summer 
of 1880, by the U. S. Coast Survey Steamer “ Blake,” Commander 
J. R. BARTLETT, U. S. N., Commanding. 
(Published by permission of CARLILE P. PATTERSON, Supt. U. S. Coast and 
Geodetic Survey. ) 
XI. 
Report on the Acalephæ, by J. WALTER FEWKES. 
HYDROIDA. 
The collection of hydroids obtained by Mr. Agassiz during the expe- 
ditions of the “ Blake ” in the Caribbean Sea, in 1878, 1879, and off the 
eastern coast of the United States, in the summer of 1880, contains the 
genera and species mentioned in the following pages. Two genera of 
gymnoblastic hydroids, Hudendriwm and Tubularia, were collected. 
The latter is 7, indivisa (1) ; the species of the former could not be de- 
termined. The majority of the remaining forms belong to the family 
of Plumularidæ. 
The following genera and species have already been described. 
Taken in the Caribbean Sea, 1878, 1879 : — 
Aglaophenia apocarpa, ALL., Milligan’s Key, 124 fms. 
gracilis, ALL., Martinique, 96 fms. 
ramosa, ALL, St. Vincent, 95 fms. 
ramulosa, KIRCH., Barbados, 94 fms. 
Montserrat, 88 fms. 
Darbados, 76 fms. 
Antenella gracilis, ALL., Barbados, 56 fms. 
Martinique, 96 fms. 
Cryptolaria abies, ALL., Barbados, 94 fms. 
renada, 154 fms. 
Xrenada, 170 fms. 
Montserrat, 88 fms. 
Sta. Cruz, 508 fms. 
VOL. VITI. — NO. 7. 
