324 ANNELIDA FROM BERMUDA. 
Fam. TEREBELLIDZ:. 
TEREBELLA (L.) Malmgren. 
TEREBELLA MAGNIFICA n, sp. 
(Plate XI, Figs. 58-60.) 
The tentacles are very numerous, stout, three-fourths as long as the 
body, even in alcoholic specimens. 
The branchie 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 off branches, forms one-half the length. The branchize 
thave 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 ; asomewhat sim- 
ilar structure, but not so well marked, occurs on the third and fourth 
segments. Back of the fourth segment are the ventral plates, sixteen 
an 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 
progressively narrower, until on the last plate the width and length are 
about equal. As the ventral plate becomes narrow the uncigerous tori 
aviden. 
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 
DHeing about one-half that of the middle segments. 
Length, 160™™. 
‘Diameter, 8™™. 
Number of segments on specimen measured, 135. 
Color in alcohol, yellowish-white. 
ENOPLOBRANCHUS Verrilil. 
ENOPLOBRANCHUS SANGUINEUS Verrill. 
Chetobranchus sanguineus VERRILL. Invert. Animals of Vineyard Sound, p. 616. 1874. 
Exoplobranchus sanguineus VERRILL. Check-List. 
Enoplobranchus sanguineus WEBSTER. Annel. Chet. of the Virginian Coast, p. 263. 
1879. 
The collection contains a few specimens, all much injured, certainly 
belonging to this peculiar genus, and probably also to Verrill’s species. 
