102 BULLETIN OF THE BUREAU OF FISHERIES. 



Of the 26 nemerteans of our catalogue, 7 appear to be common to the Canadian list 

 and 5 to that of the Plymouth station. The former list comprises 2o(+ 1 ?) species, the 

 latter 35. Herdman has listed 24( + 2?) species for the Irish Sea. None of the groups 

 of parasitic worms appear to have been catalogued at any of these other stations. 



Under the circumstances which we have stated, it is natural that few generalized 

 statements can be made regarding the distribution of these groups locally. The para- 

 sites were of course taken from the fishes, and it would therefore be futile in most cases 

 to state specific localities for these. Only such species have been listed, however, as 

 are believed to have been taken from fishes captured in strictly local waters. 



Regarding the nemerteans, it may be said that in 18 out of the 21 occasions upon 

 which these worms appear in the dredging lists they were taken in Buzzards Bay. It 

 is quite possible, however, that these forms are much more abundant throughout Vine- 

 yard Sound than would be implied by these records. As is well known, many of the 

 species burrow rather deeply into the shores and bottoms which they frequent, and con- 

 siderable digging is often necessary in order to unearth them. Now, the soft bottoms 

 of Buzzards Bay were doubtless, as a rule, penetrated more deeply by the dredge than 

 were the sandy or gravelly bottoms of Vineyard Sound. 



Of the six determined species of nemerteans recorded for the Survey dredgings not 

 one was taken with sufficient frequency to warrant our plotting a distribution chart. 

 The species of most frequent occurrence was Cerebratulus luridus, which was recorded 

 10 times, though some of these records are regarded as doubtful. This species was 

 taken throughout the lower half of Buzzards Bay. 



The six species recorded by us from our dredgings are : 



Lineus bicolor. 

 Micrura leidyi. 

 Cerebratulus lacteus. 



Cerebratulus marginatus. 

 Cerebratulus luridus. 

 Amphiporus ochraceus. 



5. BRYOZOA. 



Of the Bryozoa, 76 ( + 5?) determined species are recorded for the Woods Hole 

 region of which 5 are Endoprocta, the remainder belonging to the Ectoprocta. These 

 species are assigned to 21 families and 36(4-1 ?) genera. Out of the total number of 

 species recorded, 67 ( + 1 ?) , or about 85 per cent, were taken during our own dredging 

 operations; some 6 or 7 more were collected by other means during the progress of the 

 Survey, while 5 or 6 others are included wholly upon the authority of published statements. 

 Several new species have been encountered during the Survey dredging, descriptions 

 of which have been prepared by Dr. Osburn ; while about 45 species have been added 

 by us to the known fauna of the region. This latter number is considerably greater than 

 we have been able to record for any other group of organisms, a fact which should not 

 surprise us when we recall that no systematic study of the Bryozoa had been made in 

 these waters within the past 30 years. Indeed, the subject has remained until recently 

 in the same incomplete and rather chaotic condition in which it was left by Verrill. 

 One of the authors of the present report was led to undertake the determination of the 

 species collected during the Survey dredging. This was found to necessitate a critical 

 examination of the literature of the group and a comprehensive study of the bryozoan 

 fauna of our Atlantic coast, the results of which have recently been published. 



o Osburn, Raymond C: Bryozoa -of the Woods Hole region. Bulletin U. S. Bureau of Fisheries, vol. xxx, 1910 (1912). 

 p. 203-266, pi. xvni-xxxi. 



