174 Polychcetous Annelids Collected at Friday Harbor, 



selves, but may perhaps be influenced by their state of development. I was, how- 

 ever, unable to discover any constant relation between depth of coloration and degree 

 of development of the larvae. 



The oldest larvae I found were 0.75 mm. long and had two setigerous somites (fig. 2). 

 The anterior margin of the head is rounded and has two pairs of sharp spines, one ven- 

 tral to the other. There are two pairs of eyes, the ventral ones being represented in 

 the figure by stippling, as showing through the tissues of the head. There are two 

 bands of cilia around the head, and behind these a tuft of cilia on either side. It is 

 possible that here, also, is a continuous band, but I was unable to determine whether 

 this is the case. Two setigerous somites follow these, with very minute setae apparently 

 like the compound ones previously described. A band of cilia surrounds the body 

 near the posterior end. 



Family PHYLLODOCIDiE. 



Eteone maculata, new species. 



A single specimen of over 300 somites, the posterior end regenerating. The total 

 length was 75 mm., width of prostomium 0.5 mm., greatest body-width including the 

 parapodia 3 mm. The prostomium (fig. 3) is rather broadly rounded at its anterior 

 margin, with the lateral margins sloping slightly outward posteriorly, the diameter 

 at the posterior margin being thus about one-third greater than at the anterior. In 

 the dorsal median Une of the posterior margin is a blunt, backwardly directed lobe. 

 There are 4 small triangular tentacles. 



Dorsally the first somite is longer on either margin than in the mid-line. It bears 

 on either side 2 conical, rather thick, cirri of which the ventral ones are the larger. The 

 second somite is about two-thirds as long as the first, its parapodia being placed more 

 ventrally than is the case in succeeding somites. The flattened dorsal cirri characteris- 

 tic of this family are very small on somite 2 and gradually increase backward, reaching 

 their full size on about somite 10. Throughout they are rather thick, but never very 

 large or prominent. 



In alcohol the general body-color is yellow, with the cirri, especially posteriorly, a 

 distinct golden color. Beginning with somite 4, each somite except 9 bears on its 

 dorsal surface a prominent spot or spots. If there is but one it usually Ues in the 

 median Une; if two, they tend to lie one on either side, just dorsal to the parapodium. 

 If three, one may he in the median Une and one over each parapodium. It seems 

 probable that these are highly variable in distribution, but material is lacking for the 

 determination of this point. Similar spots, though much smaller and more variable 

 in their distribution, occur on the ventral surface. No eyes are visible on the pre- 

 served material. 



The first parapodium (fig. 4) has the characteristic form, but the parts are all very 

 smaU (of. fig. 4 with 5). There is a rounded setal lobe and a ventral cirrus situated 

 postero-ventraUy to the setal portion and united to it for almost its entire length. 

 The twentieth parapodium (fig. 5) has an entire anterior and a bifid posterior lip to the 

 setal lobe. As before, the ventral cirrus is largely fused with the setal portion, while 

 the large dorsal cirrus is more nearly free. 



The setae are aU compound and similar, with long basal joints (fig. 6). The terminal 

 joint varies somewhat in width, but in other respects those of a bundle are all alike. 

 Each is flattened, tapers to an acute point, and may be more or less bent. 



Collected at Friday Harbor. Type in the American Museum of Natural History. 



Eteone tuberctilata, new species. 



The type specimen is 106 mm. long, with a width of 1 mm. at the posterior margin 

 of the prostomium. The width of body, including parapodia, is 4 mm. 



The prostomium (fig. 7) has a rounded anterior margin between the bases of the 

 tentacles, but the lateral areas, where the tentacles are attached, are straight and 



