BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 121 



stations in Buzzards Bay. The latter list is seen to be the most extensive one, so far 

 ; t - annelids are concerned. It will be found upon p. 66 and need not be repeated here. 



Distribution charts (54-82) have been prepared for those 29 species (exclusive of 

 Spirorbis) which were taken at 10 or more dredging stations. With respect to their 

 distribution in local waters, we may arrange the species in the five following groups: 



Species nearly or quite restricted to Vineyard Sound. 



Number of stations. 



Eulalia annulata 17 Sound+ a 1 Bay. 



Lepraea rubra 22 Sound+ 1 Bay. 



Polycirrus eximeus t 10 Sound+ o Bay. 



These species and some less frequent ones which might have been included are 

 recorded almost exclusively from bottoms of sand or gravel. It is perhaps worth noting 

 that the three listed are ones which are found most commonly in the interstices of the 

 sandy ascidian, Amaroucium pellucidum. Polycirrus eximeus is recorded by us only 

 from the eastern half of the Sound. 



Species occurring predominantly in Vineyard Sound, though more or less common in Buzzards Bay. 



Number of stations. 



Harmothoe imbricata 122 Sound+6oBay. 



Lepidonotus squamatus 113 Sound+44 Bay. 



Nereis pelagica 152 Sound+23 Bay. 



Lumbrineris hebes 15 Sound+ 5 Bay. 



Pseudopotamilla oculifera 59 Sound + 18 Bay. 



Sabellaria vulgaris 6oSound+i2 Bay. 



Reference to the charts shows that in the case of four of these six species, their 

 occurrence in Buzzards Bay is in a large degree restricted to the inshore stations. This 

 is a type of distribution which has been met with frequently, being exemplified by 

 animals belonging to nearly all phyla. The comparative scarcity of mud at these 

 inshore stations of the Bay is doubtless responsible for this peculiarity in their distri- 

 bution. 



Species nearly or quite restricted to Buzzards Bay. 



Number of stations. 



Nephthys incisa. „ 46 Bay+3 Sound. 



Ninoe nigripes 38 Bay+i Sound. 



Khynchobolus americanus 22 Bay +2 Sound. 



Chaetopterus pergamentaceus 43 Bay+o Sound. 



Spiochaetopterus oculatus 35 Bay +2 Sound. 



Pista intermedia b 18 Bay+2 Sound. 



Melinna maculata 16 Bay+o Sound. 



Cistenides gouldii 37 Bay+o Sound. 



Maldane elongata 16 Bay+o Sound. 



Species occurring predominantly in Buzzards Bay, though taken occasionally in Vineyard Sound. 



Number of stations. 



Pista palmata ° 23 Bay+ 7 Sound. 



Ampharete setosa 15 Bay+ 5 Sound. 



Clymenella torquata 50 Bay+10 Sound. 



Trophonia affinis 17 Bay+ 4 Sound. 



o At mouth of Bay. 6 Mostly inshore stations. 



