NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 109 



in which the distal teeth resemble those in the simple, subacicular hooks. 

 The acicula number one larger and 2 smaller in anterior segments, and 

 2 heavier, though similar, in median and posterior segments; they are 

 distally blunt, nearly straight or only slightly curved. From the thirtieth 

 to forty-eighth setiger, the composite hooks are transitional to simple, 

 subacicular hooks; a forty-eighth setiger has about 6 composite hooks 

 and 2 or more subacicular hooks; the next setiger has 8 or more sub- 

 acicular hooks and seemingly no composite hooks, after M^hich composite 

 hooks are totally lacking. Pectinate setae are distally nearly straight (pi. 

 6, fig. 131). 



The proboscidial armature is thick, strong. Mandibles are dark, mod- 

 erately thick, M^ith long, slender supports, about 4 times as long as wide 

 where the 2 of a pair are united ; the distal ends flare slightly, terminate 

 in a rounded, cutting, calcareous edge. Maxillae are dark brown, thick; 

 the carriers are longer than wide, basally rounded (pi. 6, fig. 128). The 

 forceps (maxilla I) are falcate, with conspicuous grooves at the base on 

 the dorsal side, where the two pieces meet each other in retraction. On 

 the left side the maxillary formula of the other pieces is as follows : max- 

 illa II has 4 teeth left, 5 teeth right, maxilla III has 6 teeth left, maxillae 

 III and IV united on the right side have 7 teeth, maxilla IV has 6 

 teeth left, maxilla V has a single tooth on either side (pi. 6, fig. 128). 



The tube is coarse, stiff, irregularly coiled, horny brown or paler, 

 and covered externally with fine, foreign particles; it is much twisted, the 

 walls not thick, but tough. 



E. afuerensis is different from other known species of Eunice in having 

 the unique transitional hooks in median segments; branchiae are already 

 present from an early (third) segment, and continued to the posterior 

 end. 



Holotype. — AHF no. 44. 



Type locality. — Lobos de Afuera, Peru (Coll. 391-35). 



Distribution. — This species is known only from Lobos de Afuera, 

 Peru, in the intertidal zones. 



Eunice aphroditois (Pallas) 



Crossland, 1904, p. 288; Fauvel, 1917, pp. 215-225, 2 figs., 2 charts; 

 Monro, 1933, pt. 1, pp. 58-59. 



Collections.— A3?>-?>5 (1); 435-35 (2); 450-35 (1); 530-36 (6); 

 638-37 (1) ; 662-37 (1) ; 739-37 (1) ; 1045-40 (2) ; 1084-40 (2). 



Most individuals are large, robust, uniformly dark reddish except for 

 a pale band across the fourth podal segment; the tips of dorsal cirri are 



