NO. O NEW POLYCHAETOUS ANNELIDS TREADWELL 3 



EUPHOLOE Mcintosh 

 EUPHOLOE ACUMINATA, n. sp. 



Plate I, figs. 7, 8 



Only incomplete specimens are present. The type measures 28 mm 

 for the first 50 somites and has a width anteriorly of 6 mm. The 

 head width is 5 mm. This width continues for about the first 10 mm 

 of body length, but behind this there is a decided narrowing. The 

 prostomium (fig. 7) is oval in outline, with the tentacle arising in 

 the middle oi its anterior border. Dorsally there are two very in- 

 distinct eyes (not shown in the figure), and two others, much more 

 distinct, lie near the ventral surface. The cirrophore of the tentacle 

 is globular and about half as long as the prostomium, but is very 

 thin-walled. Toward the end there is a constriction, so that the style 

 is carried on the end of a very small globular portion. The style is 

 slender and four or five times as long as the prostomium. 



The first parapodia are elongated cones, truncated near the ends, 

 and each has a very slender dorsal cirrus near its end (fig. 7). The 

 two parapodia are in contact at their bases and on either side press 

 tightly against the tentacle, each long, slender dorsal cirrus reaching 

 to the end of the tentacle. This arrangement of tentacle and parapodia 

 gives a pointed appearance to the anterior end of the animal. In each 

 parapodium is a dense tuft of setae, which overlap from the two sides 

 and surround the ends of tentacle and cirri. The palps are long and 

 slender, extending beyond the tips of the first parapodial setae. The 

 first pair of elytra carried on the first parapodium are borne on 

 transversely oval elytrophores (fig. 7) and completely cover the 

 prostomium. Between the elytrophores the anterior margin of the 

 first somite protrudes over the prostomium. In one specimen this 

 protrusion is a blunt cone ; in the other it has two rounded lobes on 

 its margin. The lower lip is prominent, its surface thrown into 

 longitudinal folds. 



As stated, the first pair of elytra overlap. I am uncertain about 

 the second, but behind this there is a definite area of the dorsal sur- 

 face that is uncovered. Even when elytra have been removed, this 

 clearly shows because of a dusting of fine sand grains on portions 

 of the dorsal surface that had been uncovered by elytra. A similar 

 covering of sand grains appears on the elytra, these grains being 

 coarser on anterior somites. Except where overlapped by other 

 elytra, each elytron carries a row of fine cirri around its margin, and 

 on its outer half there are a considerable number of these on the 

 surface. Except at the point of attachment, each elytron is very thin 



