324 ANNELIDA FROM BERMUDA. 



Fam. TEREBELLID^. 

 TEREBELLA (X.) Malmgren. 



TeKEBELLA MAGNIFICA 11, Sp. 



(Plate XI, Figs, 58-60.) 



The tentacles are very numerous, stout, three-fourths as long as the 

 body, even in alcoholic specimens. 



The branchiae of the first pair are large and long (12'"™) ; of the 

 second, one-half the first; of the third, one-half the second: the stem, 

 before giving oti" branches, forms one-half the length. The branchiai 

 have numerous brown specks on their stems and branches. 



Seven segments, beginning with the second branchiated, have a 

 small, conical papilla or cirrus, placed between the two rami; there is a 

 similar cirrus at a corresponding place on the first branchiated segment. 



The ventral surface of the second segment is raised into a thin plate, 

 on either side of the middle line, widening externally; a somewhat sim- 

 ilar structure, but not so well marked, occurs on the third and fourth 

 segments. Back of the fourth segment are the ventral i)lates, sixteen 

 in number, of uniform width, their anterior and lateral margins thick- 

 ened and separated by an impressed line from the body of the plate. 

 The width of the first plate is five to six times its length; they become 

 ]>rogressively narrower, until on the last plate the width and length are 

 about equal. As the ventral plate becomes narrow the uncigerous tori 

 widen. . 



An impressed line running just in front of the pedal rami divides 

 each segment into two parts ; very distinctly above, less so below. 



The body retains a uniform diameter to the posterior sixth ; after 

 which it tapers somewhat rapidly, the diameter of the anal segment 

 being about one-half that of the middle segments. 



Length, IGO"""'. 



Diameter, 8™™. 



Number of segments on specimen measured, 135. 



Color in alcohol, yellowish- white. 



ENOPLOBEANOHUS Verrill. 

 Enoplobkanchus sanguineus Verrill. 



Chcetohranchns sangitineus Verrill. Invert. Animals of Vineyard Sound, p. 616. 1874. 

 Enoplohranchiis sanguineus Verrill. Check-List. 



Enoplohranchus sanguineus Webster. Annel. Chast. of the Virginian Coast, p. 263. 

 1879. 



Tlie collection contains a few specimens, all much injured, certainly 

 belonging to this peculiar genus, and probably also to Yerrill's siiecies. 



