28 ANTARCTIC MARINE 



spread along a distance about equal to five or six body-diameters, the distance 

 between the adjacent organs being about equal to the radius of the body. These 

 organs. are of such a nature that when the body is stretched out they hardly dis- 

 turb the ventral contour, but when the tail end is incurved, as is often the case, 

 they become slightly raised, so that the altitude is about equal to one-half the 

 width of one of the annules of the cuticle. In this contracted condition of the 

 ventral surface of the body the distance between the organs is about equal to 

 their own diameter. The ejaculatory duct is one-fourth, the vas deferens three- 

 fourths, and the testis two-fifths as wide as the corresponding portions of the 

 body. The testis is cylindroid. Rather distinct, oblique copulatory muscles 

 are found coextensive with the supplementary organs. 



Habitat; remarks. Cape Royds; Bay, Cape Royds. Numerous specimens, 

 somewhat shrunken. 



21. Euchromadora denticulata, n. sp. Striae about 400, resolvable into bas- 

 ketwork-like markings of a rather obscure character on the anterior part of the 



neck. The lips are sub- 



2.4 14.' 26. 53 Y 83. distinct. At the nerve- 



~I.~2~~ir4~~I.~7~~3.~V ring the oesophagus has 



a diameter equal to two- 

 fifths the corresponding diameter of the neck, but swells 

 posteriorly to three-fourths the corresponding diameter. 

 In the posterior swelling the lining is somewhat expanded. 



The dimly seen pyloric collum is one-third as wide as the body. Intestinal 

 granules are scarce. The ellipsoidal caudal glands occur in a close tandem 

 opposite the anus and in the anterior fourth of the rather massive tail. The 

 caudal setae, six ventro-submedian, and six dorso-submedian, are slender, stiff, 

 somewhat cylindroid, sub-acute, and one-sixth as long as the anal body-width. 

 The renette-cell, two-thirds as long as the body is wide and one-third as wide as 

 long, empties through a pore opposite the nerve-ring. In both the specimens 

 examined there appears a slender seta-like appendage (?) at the mouth of the 

 excretory pore. The female reproductive organs are double and symmetrical, 

 and probably reflexed. 



Habitat; remarks. Cape Royds. Two females, in fair condition. 



22. Euchromadora meridiana, n. sp. The cuticle is much like that of Euchro- 

 madora vulgaris, (Bast.) de Man. 400 striae, retrorse posteriorly and the reverse 

 anteriorly, make the con- 33 



tour obscurely crenate. PP " \l^V~ JL_ 6 J_ 4 ^- 1 _i: l 



The oesophagus, cylin- 



droid anteriorly, conoid < . - < 



posteriorly, has several ...... 8 . 4 



breaks in its muscula- 

 ture, the most prominent being at the beginning of the final fifth of the neck. 

 The numerous intestinal granules are small, uniform, and indistinct. The rather 

 ellipsoidal caudal glands are arranged in an open tandem. Immediately behind 

 the anus the tail has a diameter equal to three-fourths the anal body-diameter; 

 thence onward it tapers but very slightly to the middle, where it begins to taper 

 more rapidly to the terminus which is one-third as wide as the anal body-diameter. 

 The lateral fields are somewhat distinctly cellular. The renette-cell, which pushes 



