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
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