NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 85 



The everted proboscis is pale, proximally smooth, and terminates 

 dorsally in a long, tapering median papilla and 6 shorter papillae on 

 each side. The ventral side is similar but the median papilla is smaller. 

 Jaw pieces are amber colored, the 4 main fangs with darker tips ; the lat- 

 eral elongations have 5 teeth on each piece, but the lower left has 6 teeth. 



The prostomium is pale, approximately trapezoidal, widest pos- 

 teriorly. The ommatophores are elongate, inserted near the anterior 

 margin of the prostomium and projecting anteriorly almost as far as 

 the style of the median antenna (pi. 25, fig. 300). The median an- 

 tenna has a long, basal stalk that extends posteriorly nearly to the pos- 

 terior margin of the prostomium, its article is tapering and extends 

 slightly beyond the lateral antennae and the ommatophores (pi. 25, fig. 

 300). The paired prostomial antennae are smaller than the median and 

 inserted ventral to the ommatophores, and continuous with the pro- 

 stomial lobes. They are only slightly visible when the prostomium is 

 viewed from the dorsum. Palpi are pale, long, tapering, 5 or 6 times 

 as long as the prostomium is wide. 



The peristomium or first segment is directed anteriorly at the sides 

 of the prostomium. Its 2 pairs of cirri resemble the prostomial cirri, 

 but they extend distally beyond them (pi. 25, fig. 300). The parapodia 

 of the second segment (first parapodial segment) are directed laterally 

 (pi. 25, fig. 302). They are notably longer than those of the next seg- 

 ment (pi. 25, fig. 303) and have a ventral cirrus that is both longer 

 and thicker. The first parapodium has a small dorsal fascicle of about 

 10 slender setae, and a larger, fan-shaped ventral fascicle of about 35 

 setae. The ventral setae are long, slender, tapering, smooth or nearly 

 so, but some of the ventral ones have a slightly enlarged spiny area near 

 the point where they emerge from the parapodial lobe. More posterior 

 parapodia resemble one another more nearly in that the neuropodial lobe 

 is shorter in proportion to its length. 



A typical parapodium, from the thirty-fifth segment (pi. 25, fig. 

 301), has a small papillar notopodium, provided with a slender, pale 

 aciculum, and a few (6 to 10) slender capillary setae, visible only under 

 higher magnification. The neuropodium has pale yellow setae of 3 kinds, 

 (1) a superior fascicle of 15 to 20 pointed, tapering setae, obscurely 

 pectinated at the widest part (pi. 25, fig. 307) with a long, slender 

 stalk, (2) a median fascicle of 12 to 15 stout, acicular, aristate setae 

 (pi. 25, fig. 308), and (3) an inferior fascicle of about 10, sickle- 

 shaped, serrated setae (pi. 25, fig. 305, 306). 



