PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol. 88 Washington : 1940 No. 3090 



SEVEN NEW SPECIES AND ONE NEW GENUS OF 

 HYDROIDS, MOSTLY FEOM THE ATLANTIC OCEAN 



By C. McLean Eraser 



Some time ago the United States National Museum forwarded to 

 me for examination a large collection of liydroids taken mostly by the 

 United States Bureau of Fisheries from the North American coastal 

 area of the Atlantic Ocean. As yet only about one-third of the ma- 

 terial has been examined, but this has provided nearly 600 distribu- 

 tion records of 127 species. At this stage it would not be expedient 

 to assemble and digest these distribution records, but it might be a 

 good time to report and describe the new species already observed. 

 There are seven of these species, one of them apparently belonging 

 to a new genus, and a gonosome of a species in which the trophosome 

 has already been described. All but one of these were obtained 

 from the Atlantic. The exception, Diphasia crassa, appeared in 

 dredged material obtained on the west coast of Chile, a short dis- 

 tance north of the western entrance to the Strait of Magellan. 



I wish here to express my appreciation of the courtesy shown by 

 the United States National Museum in providing the opportunity 

 to examine this interesting material. I am indebted, as well, to Miss 

 Ursula Dale, assistant in the department of zoology in the Univer- 

 sity of British Columbia, for drawing the figures. 

 Genus EUDENDRIUM Ehrenberg 



EUDENDRIUM RUGOSUM, new species 

 Plate 32, Figltre 1 

 Trophosome.— Co\on\Q,s growing in close clusters, reaching a height 

 of 15 mm.; stems simple, not annulated, but decidedly wrinkled 



575 



214225—40 



