HOPLOLAIMUS 365 



long-clavate swelling which at its widest part is one-fourth as wide as the base of 

 the neck. It is however natural to imagine the swollen salivary glands to be 

 joined with this inconspicuous posterior portion of the oesophagus and thus at 

 first to get an idea that the posterior part of the oesophagus comprises a wide 

 clavate swelling, three-fourths as wide as the base of the neck. We may say 

 therefore that the oesophagus behind the pharynx is about one-seventh, at the 

 nerve-ring also about one-seventh, and finally about one-fourth as wide as the 

 corresponding portion of the neck. The lining of the oesophagus is a distinct 

 feature arteriorly and consists of a narrow highly refractive tube; posteriorly 

 the lining is inconspicuous. The musculature is fine and colorless. There are 

 three salivary glands clustered opposite the posterior two-fifths of the oesopha- 

 gus. One of these cells comprises the anterior portion of the cluster, while the 

 other two may lie more or less opposite each other as the posterior part. 

 The salivary glands are very well developed, and two of them, 

 submedian, empty through ducts into the base of the valve of 

 the median bulb, while the third, the dorsal, passes forward and 

 empties into the dorsal side of the oesophageal lumen not far 

 behind the base of the onchium. At the mouth of each duct 

 a faint ampulla is usually visible. The median oesophageal 

 bulb presents a spheroidal, simple, strongly refractive 

 valve one-sixth as wide as the bulb itself. There is no 

 distinct cardia. The thick-walled intestine, which presents 

 a distinct refractive lumen, is not set off from the oesoph- 

 agus by a cardiac collum, the change from oesophagus to 

 intestine being gradual. The intestine has its cells closely 

 packed with granules of variable size, the largest being 

 one-twelfth to one-sixteenth as wide as the body. These 

 colorless, non-birefringent, spherical granules gradually de- 

 crease in number in the cardiac region and cease altogether 

 opposite the posterior portion of the salivary glands; they are 

 sometimes so arranged as to give rise to a tessellated effect. er f, IG vi g W H c 

 The intestine somewhat gradually becomes four-fifths as wide natus n sp Bei ow> 

 as the body, and is composed of cells of such a size that two to a semi-contour of the 

 three are presented in each cross section. The cells of the body in the same 

 intestine are so closely packed with granules as to make it JJJ ^f n g win * 

 difficult to examine successfully in living specimens details 

 of the anatomy of adjacent organs. The exceedingly small 

 anus and the rectum are very inconspicuous. There is no pre-rectum. The tail 

 is of an elongate hemi spheroid form, very broad and rounded at the extremity, 

 and symmetrical. There is no spinneret and there are no caudal glands. 

 Measured at the latitude of the nerve-ring, the lateral chords are as wide as the 

 cuticle is thick, or wider; somewhat farther back, they are about one-third as 

 wide as the body. They contain scattered colorless refractive spherical gran- 

 ules of variable size, considerably smaller than those of the intestine. Behind 

 the base of the neck, at a distance about equal to the diameter of the body, 

 there is a cell which presses the intestine well to one side. This cell is about 

 as long as wide but not spheroidal. It is finely granular, one-half as wide as 

 the body, and seems very probably to be connected with the renette. The 

 excretory pore, which is opposite the base of the neck, is rather distinctly to be 

 seen, though of. small size. It lies between two annules, and the nearer stria- 

 tion may bend a little to one side for it. The renette duct leads inward and to 

 the right alorg the right lateral chord. From the somewhat depressed, rather 

 large and rather conspicuous vulva, which is a transverse slit two-fifths as long 



