BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 1 27 



and inconspicuous forms, it is likely that the list of these is far less complete than that 

 for the latter group, which comprises, for the most part, species of moderate or large 

 size. It is the Malacostraca, likewise, which are chiefly represented in our dredging 

 records; indeed, we should say exclusively represented but for the ever-present barnacles. 

 Owing to the magnitude of this class and to the fact that different sections have 

 been treated by different specialists, it seems best to consider the orders separately. 



I. PHYLLOPODA. 



The Phyllopoda are represented in our list by two members of the Polyphemidse, 

 which were identified by Mr. R. W. Sharpe among material collected with the townet 

 at Woods Hole, and by a species of A rtemia, which was observed by Verrill in ' ' salt vats ' ' 

 at Falmouth, and is perhaps not to be included in our marine fauna at all. One or more 

 species of Polyphemidae are at times excessively abundant in the Woods Hole plankton, 

 and it is likely that our phyllopod fauna is far more extensive than the present meager 

 records would imply. 



II. OSTRACODA. 



Twenty-six species of ostracods have been identified by Dr. Cushman" among 

 specimens collected in the vicinity of Woods Hole. Of these, 21 were recorded from 

 the Survey dredgings. Since this group had never been studied locally prior to the work 

 of Dr. Cushman, all of these 26 species may be regarded as additions made to our local 

 fauna through the operations of the Survey. Ten of them were described for the first 

 time by Dr. Cushman from specimens dredged or otherwise collected during the summer 

 of 1905. 



Mr. R. W. SharjDe, who has examined large quantities of townet material collected 

 in Woods Hole Harbor, believes that he has met with "perhaps 20 forms, certainly new 

 to oar shores, and mostly new to science." Thus far, however, he has not published 

 descriptions of any of these local species. 



Reference to the comparative table on page 88 shows that 29(4-9?) species of ostra- 

 cods have been listed for eastern Canada, 6 for Plymouth, 57(-|- 1 ?) for the Irish Sea, 

 and 9 for the Gulf of Trieste. It is likely that these numbers represent the relative thor- 

 oughness of the search which has been made for these organisms rather than the relative 

 wealth of species at these points. Ten of the Canadian species are known to be common 

 to Woods Hole, but so far as we may infer from the lists there are no species com- 

 mon to Woods Hole and Plymouth. 



None of the Ostracoda were recorded from a sufficient number of dredging stations 

 to warrant our plotting distribution charts for them. Moreover, they were only sought 

 for during one season of the regular dredging work of the Survey *" and consequently 

 we have a very imperfect idea of their distribution in local waters. From our records 

 the ostracods appear to be chiefly restricted to the western end of Vineyard Sound, and 

 it seems likely that their scarcity in the eastern part is in a considerable measure 

 real, since bottom samples from the entire length of the Sound were examined by 

 Dr. Cushman. 



a A list of these has already been published in Proceedincs of the Boston Society of Natural History, vol. 32, 1906. 

 t A few additional records were obtained in 1907. 



