IS 



ANTARCTIC MARINE 



the pair in front 

 of the other, on 

 the sub-median 

 lines. There are 

 probably three 

 lips, bearing six 

 minute setose 

 papillae ar- 

 ranged in a sin- 

 gle circlet. The 

 lining of the oe- 

 sophagus is very 

 ' distinct, and the 

 musculature 



rather coarse. The granules of the intestine are yellowish brown. Toward the 

 posterior extremity, for some distance in front of the anus, there is a strong 

 development of lateral cells, which do not appear to exist elsewhere in the 

 body. These cells extend forward toward the middle of the body, and have been 

 traced no farther. Their size, which is variable, is such that two or three occur 

 side by side in the lateral fields. The tail is cylindroid in its posterior three- 

 fifths, with a width there one-eighth as great as that of its base, and has a slightly 

 swollen terminus. The caudal ducts, of which two were seen, are narrow and 

 distinct. From the excretory pore at the end of the third fifth of the neck 

 there leads inward a very narrow duct whose length is nearly equal to the thick- 

 ness of the cuticle. The duct leading thence back to the renette cell is, however, 

 of considerable width about one-fourth as wide as the oesophagus and is read- 

 ily traced back to a point opposite the anterior part of the intestine, where the 

 renette cell pushes the intestine to one side. The spicula are uniform, with a 

 width near the distal extremity one-sixth as great as the corresponding body 

 width. The single accessory piece, parallel to and close to the distal thirds of the 

 spicula, has an apophysis tapering to an obscure and slightly recurved point. This 

 apophysis lies at right angles to the spicula, and then curves forward a little. The 

 ejaculatory duct is one-third as wide as the body, the vas deferens considerably 

 wider. The blind end of the anterior, larger testis is disposed in one or two coils. 

 Habitat; remarks. Bay, Cape Royds. The single specimen examined was in 

 good condition. 



8. Monhystera uniformis, n. sp. Apparently there are three very obscure con- 

 fluent lips. The amphids when seen in the dorso- ventral view seem to be well 



chitinized, and appear deepest in the 

 anterior part, where they are one 

 fifth as deep as the head is wide. The 

 cardia is twice as long as wide. The 

 cylindroid part of the tail is one-third 

 to one-fourth as wide as the base. 

 Broadly saccate caudal glands are 



found in the anterior half of the tail. At a distance behind the neck equal to three 

 to four body-widths there is an ellipsodial renette cell with a large nucleus. This 

 gland-cell is one and one-half times as long as the body is wide and half as wide as 

 long. The location of the excretory pore has not been made out with certainty; 



13.2 20. -83' 



.9 12.8 20. -M 



