338 PROCEEDINGS OF THE ACADEMY OF [April, 



A single specimen of this species (co-type) occurs in the collection 

 from Station 4,496. 



The type is No. 2,028 of the collection of this Academy and is 

 referred to on p. 335 of the Proceedings for 1908 under the name of 

 Harmothoe hirsuta Johnson as coming from Station 4,205 in Puget 

 Sound. My belief at that time was that H. hirsuta lost the areolation 

 of the elytra and the accessory tooth of the tips of the neuropodial 

 setae with age but additional material has convinced me that this is 

 not the case. This species, though related to H. hirsuta, differs in the 

 form of both notopodial and neuropodial setae and in the absence of 

 elytral areas. 



Station 4,496. Monterey Bay, off Santa Cruz Light, 10 fathoms, 

 fine gray mud and sand. 

 Eunoe caeca sp. uov. PI. XXVIII. figs.7-12. 



A species having the general aspect of Polynoe pulchra Johnson, of 

 similar commensalistic habits, but somewhat stouter. The body is 

 rather thick dorso-ventrally and the parapodia slope upward, forming 

 a shallow, open trough above, a peculiarity that at once distinguish!' 

 this species from the last. The type is 40 mm. long, the maximum 

 width at about X being, body — 6 mm., between tips of parapodia — 

 11 mm., between tips of setae — 14 mm. Number of segments 43. Tw< > 

 of the cotypes are of equal size, the third about one-fourth smaller. 



Prostomium (PI. XXVIII, fig. 7) squarish, the posterior border alone 

 strongly rounded, slightly wider than long, posterior half of lateral 

 border somewhat bulging and convex, sides anterior to this gently 

 convergent to the prominent antero-lateral angles or peaks; anterior 

 borders nearly straight with a very shallow median emargination ; 

 no dorsal furrow and no eyes. Ceratophore of median tentacle at 

 level of dorsal surface of prostomium and separated from it by a very 

 slight transverse groove, barrel-shaped, about one-half length of 

 prostomium and, owing to slight development of anterior fissure, 

 standing freely and prominently forward. Style (fig. 7) about three 

 and one-half times length of prostomium, slender, regularly tapered, 

 with filamentous tip and no subterminal enlargement ; sensory papilla* 

 almost entirely wanting, only a very few small ones being present. 

 Lateral tentacles arising at a low level on antero-ventral face of 

 prostomium from cylindrical ceratophores which are nearly as long 

 as, but much more slender than, the median ceratophore and which lie 

 well mediae! of the cephalic peaks; styles about one and one-third 

 to one and one-half times length of prostomium, very slender, sub- 

 ulate, with long filamentous tips. Palpi also very long, slender and 



