BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



117 



Solaster endeca. 

 *Henricia sauguinolenta (chart 47). 



Asterias austera. 

 *Asterias forbesi (chart 48). 



Asterias tenera. 

 *Asterias vulgaris (chart 49). 



Ophioderma brevispina. 



Ophiopholis aculcata. 

 *Amphipholis squamata (chart 50). 



Amphioplus abdita. 



Gorgonocephalus agassizii. 

 *Strongylocentrotus droebachiensis (chart 51). 

 *Arbacia punctulata (chart 52). 

 *Echinarachnius parma (chart 53). 



Cucumaria pulcherrima. 



Thyone briareus. 



Thyone unisemita. 



Caudina arenata. 



Considering the 7 more prevalent species of local echinoderms, we may group 

 them, as usual, according to their range upon our coast, as predominantly northern or 

 southern. The distributions here stated are those given by Clark. 



Predominantly northern. 



Henricia sanguinolenta " Greenland and Labrador to Connecticut, off New Jersey and even 



Cape Hatteras." 

 Asterias vulgaris " Labrador to Cape Hatteras; but south of the Woods Hole region 



rarely seen in shallow water." 

 Strongylocentrotus droebachiensis . . "Circumpolar; southward in the western Atlantic to New Jersey 



(not in shallow water south of Cape Cod)." 



Predominantly southern. 



Asterias forbesi " Maine to the Gulf of Mexico, rare or local north of Cape Ann. " 



Arbacia punctulata " Nantucket Shoals and Woods Hole to West Florida and Yucatan. " 



Of uncertain position. 



Amphipholis squamata Arctic Ocean to West Indies and South America. (Australia; 



Mediterranean Sea.) 

 Echinarachnius panna On our coast, from Labrador to New Jersey (also Red Sea). 



It is obvious that no fair opinion can be formed regarding the zoogeographical 

 position of our local echinoderms from a consideration of these few species. According 

 to Clark, 5 of the 6 true starfishes of the region are northern, though the Asteroidea 

 are the only group which show this preponderance of northern forms. 



7. ANNULATA AND SIPUNCULIDA. 

 ANNULATA. 



Of the Annulata proper 148 determined species are recorded, to which number 

 must be added 4 undetermined species and a few others which are doubtfully to be 

 included in this list. These species represent 109 genera and 40 families. Of the total 

 number of species recorded, 83, or more than 50 per cent, were taken during our own 

 dredging operations; 46 others are recorded for local waters on the authority of persons 

 who have participated in the work of the SurA'ey, while 30 species are included wholly 

 on the authority of published statements. The great majority of the segmented worms 

 here recorded belong to the subclass Polychaeta, of which about 135 species have been 

 listed for the region. In addition to these, however, are 1 1 species of OUgochseta and 

 4 of the Hirudinea. 



Only a single new species (Arabella .fpinifera Moore) has been described from speci- 

 mens taken during the Survey dredging. A number of species hitherto unrecorded 

 locally have, however, been added to the known fauna of the region. Such are Myxicola 

 steenstrupii, Pista intermedia, Polycirrus phosphoreus, Spiochatopterus ocidatus, Spirorbis 



