40 NATURAL HISTORY BULLETIN 



dition, and showed the particular characteristics of the species 

 so well. Almost all the colonies seemed to be equally serviceable 

 for examination; one did not have to look over much material 

 to find a specimen for diagnosis. This may be due to the fact 

 that the locality is so close to the deep waters of the ocean and 

 is not befouled as shallow water so often is. I obtained only 14 

 species, but of these three had not previously been reported from 

 the region. These were Bougainvillia carolinensis, Eudendrium 

 vaginatum and Campanularia calcedlifera. These have all been 

 obtained from the Woods Hole region, but one of them, 

 'Eudendrium vaginatum, not until I had collected it a couple of 

 tfeeks previous. 



A report on these species from Woods Hole and South Harps- 

 well, with observations on some other forms already reported, 

 make up the material for this paper. Many of the species are 

 described in full in a paper on "Some Beaufort Hydroids", 

 which is being published by the U. S. Bureau of Fisheries, but 

 the work is not far enough advanced to be able to give any page 

 references. 



The figures, the drawings for which were made by my wife, 

 show a magnification of about eighteen diameters. 



I wish to express my obligation to the U. S. Bureau of Fish- 

 eries for the facilities it afforded at Woods Hole and to Pro- 

 fessors Kingsley and Neal for the benefit I derived from my 

 sojourn at the laboratory at South Harpswell. The facilities for 

 the study of hydroids afforded at the State University of Iowa, 

 have made it possible for me to attempt much work this year, but 

 these facilities would lose much of their value were it not for 

 the assistance that Professor C. C. Nutting is always ready and 

 willing to give. I cannot acknowledge too often my obligation 

 to him for the interest he has taken in all this systematic work. 



Gemmaria gemmosa McCrady. 



Gemmaria gemmosa was found in abundance at several points, but the 

 most suitable place for collecting it was just outside the entrance to the 

 eel-pond, where masses of serpulid tubes could be picked up readily, over 

 a good sized area. These masses were coated with the brick-red Mem- 

 hraniiwra; over much of this Memhranipora, Gemmaria could be found. 

 Reference has been made in my Beaufort paper to the confusion there 

 has been in the synonymy of this species. It has occurred to me that pos- 



