660 A. E. Verrill — Turhellaria^ Nemertina, and 



Pmxilhira Ver., 1879. Type, P. ornata V., op. cit., p. 179. 



This cannot be united to Lumhriclyniene, as St. Joseph has done 

 with doubt. It differs very much in having spines on about seven 

 anterior segments and a mixture of spines and uncini on others ; in 

 having very numerous segments (about 40) ; and in having the anal 

 segments small and simple, or not specialized in any way, with the 

 anus terminal. 



This is, perhaps, the most generalized or primitive type of Mal- 

 danidse hitherto discovered. This is shown in the simple structure 

 of the head and caudal segment; in the large number of only 

 slightly differentiated segments; in the increased number of anterior 

 segments with simple spines, and in the mingling of spines and 

 rostrate uncini in intermediate segments. 



Eupolymnia, nom. nov. 



Polymnia Malmgren, Ann. Polychteta, p. 108, 1867 (non Muls., Verr., Birds, 

 1866). Von Marenz., 1884. St. Joseph, Ann. Sci. Nat., Ser. 7, xvii, p. 219, 

 1894. 



The above name is proposed as a substitute for Polymjiia, which 

 was preoccupied in 1866. 



At the same time I propose to somewhat extend its limits, in 

 order to include a remarkable Bermuda species for which it seems 

 necessary to establish a subgenus, Polymniella. 



As now understood, this genus is characterized mainly by having 

 the ordinary Terebelloid form of body and cirri, with about 17-22 

 anterior segments bearing smooth capillary setfe, which begin on the 

 4th body segment. The uncini, which are rather simple, begin on 

 the 5th segment. They have only two rows of apical denticles, 

 usually with 2 and 3 in the rows; a rather long base, with a tubercle 

 at each end, and a lateral tubercle for the ligament; on some of the 

 anterior segments they form a single row, but farther back they are 

 in two rows that face each other. Tlie branchire are arborescent, the 

 anterior usually largest. Usually there are three pairs, arising from 

 segments 2, 3, 4, but in Polymniella the last is on the 6th segment. 



The very large Bermuda species, P. raagnifica (Webst.), see p. 

 599, above, is a typical member of this genus. It has over 120 

 segments, of which 17 bear setoe, and three pairs of large arborescent 

 gills, the first pair largest. 



Polymniella, subgen. nov. 



This is proposed for the following new species which agrees with 

 Polymnia, except in the arrangement of the bi'anchiae and anterior 



