322 ' ANNELIDA FROM BERMUDA. 



Fam. OPHELIID^. 



OPHELINA Orsted. 



Grube, in his Annulata Semperiana (p. 193), arranges the genera of 

 this family in the following manner : 



0/)/fe7i?ia Orsted ; type, Ammotrypanne aidogaster 'R&.tiiKv:. 

 Ammotrypane Rathke ; type, Ammotrypane limacina Rathke. 

 Ophelia Savignt ; type, Ophelia Mcornis Savigny. 



This arrangement seems to be correct, and accordingly the following 



species has been referred to Ophelina. 



Ophelina maculata n. sp. 



(Plate XI, Figs. 54, 55.) 



Head as long as the first three segments taken together, terminating 

 in a delicate, elongated, conical process, which is set off by a shallow con- 

 striction. 



There are three eyes, forming a transverse series, near the posterior 

 margin of the head, very small, the middle one largest. The first seg- 

 ment is quite short ; from the first to the seventh the segments increase 

 gradually in length ; after the seventh they are of uniform length, ex- 

 cept the last four, which are shorter. 



The outline of the feet and relative length of the setse are shown in 

 Figs. 54, 55. 



The branchiae begin on the second segment ; on all our specimens 

 there are 24 pairs of branchiae, with one exception, where there are 24 on 

 one side, 25 on the other, leaving three non-branchiated setigerous seg- 

 ments. It is possible that the branchiae have been lost from some or 

 all of these segments, as we have but few specimens, and in all the pos- 

 terior segments are somewhat injured. 



The branchiae are densely ciliated. 



On the seventh segment a circular black spot appears on the side of 

 the segments, close to the origin of the branchiae. These spots are 

 fouud on ek ven segments; they then become elongated, narrow, and 

 presently disappear. 



The general color {in alcohol) is pearl-gray. In every case the anal 

 ■ segment is too much injured to admit of determining the number of the 

 papillae. A few of them are bifurcate at extremity. 



Length, lO"""^. 



Width, 2™". 



