36 COE 



sels, etc. The individuals are very voracious feeders, and were taken 

 not infrequently with partially swallowed Chaetopods. Their tenacity 

 of life is remarkable they will live for days in a small quantity of 

 filthy water. 



11. PARANEMERTES PALLIDA sp. nov. 

 pi. vii, fig. 3; pi. xii, fig. 1. 



Body rather large, stout, rounded, and almost cylindrical anteriorly, 

 somewhat flattened behind when extended ; head variable in shape, 

 not sharply marked off from portions immediately following, at 

 certain states of contraction emarginate in front. A pair of incon- 

 spicuous oblique furrows back of head. When contracted the worms 

 are nearly cylindrical and of about the same diameter throughout, ex- 

 cept at the extremities, both of which are pointed. 



Color. The whole body, both above and below, is commonly uni- 

 form opaque white, sometimes showing traces of yellowish or reddish 

 tints, especially in the anterior portions. 



Ocelli. Ocelli minute and numerous. In ordinary states of con- 

 traction they are arranged in a pair of elongated, irregular clusters on 

 the antero-lateral margins of the head. The number of such ocelli is 

 sometimes 30 or more in each of the two clusters. 



Proboscis. Small, short, and unusually slender (pi. xn, fig. 1). Its 

 armature consists of a moderately slender central stylet and usually 4 

 pouches of accessory stylets. The basis of the central stylet is mod- 

 erately slender, slightly constricted near its middle portion, rounded 

 behind, and of approximately equal length with the stylet (pi. vn, fig. 

 3). There are commonly two accessory stylets in each of the 4 

 pouches. The chambers posterior to the stylet apparatus are remark- 

 ably narrow. 



The mouth opens into the rhynchodaeum. The proboscis sheath 

 extends but little beyond the middle of the body, and sometimes not so 

 far as the middle. One specimen had 9 nerves in the proboscis ; an- 

 other had 10. These nerves do not all enter the proboscis from the 

 ventral side, as they do in Amphiporus angulatus, but those supply- 

 ing the dorsal portion enter direct from that side. 



Closely packed sub-muscular glands are present on the right and 

 left sides of the body, and extend well inward towards the median line. 

 Their ducts pierce the musculature and other layers of the body walls 

 mainly on the latero-ventral aspects of the body. Twenty or more 

 are frequently met with in a single section. These glands occupy also 

 the region in front of the brain, and extend backward in decreasing 



