314 ORDER ANAXONCHIA 



1-. .. .<-.. .1?-. . .'.'5.1'.'.. .?. >2 . 4 .. 



95. Digitonchus uniformis n. sp. l - 5 1 - 9 * ** 5 Possibly the 



transverse striae are resolvable into exceedingly minute markings. Cuticle 

 naked except for the cephalic setae. Lips three, possibly very faintly double. 

 Onchium spear-like, solid. Anteriorly, the neck is convex- 

 conoid. The oesophagus has not been well seen but 

 appears to bo more or less cylindroid; its diameter at 

 the base is about half as great as that of the base of the 

 neck. Its lining is subdistinct, its colorless musculature 

 fine in texture. The more or less thick-walled intestine, 

 fuNe " x750 which has a faint lumen, becomes at once half as wide as 

 the body. Cardiac collum one-third as wide as the base of the neck. From the 

 more or less elevated anus, the prominent, cutinized rqctum is about as long as 

 the anal body-diameter. The conoid, arcuate tail tapers from the anus to the 

 rather simple spinneret. The rather broadly saccate caudal glands are packed 

 behind the anus in the anterior third of the tail; they empty by separate ducts. 

 The lateral fields are one-third as wide as the body. Renette unknown. The 

 nerve-ring is accompanied by obscure nerve cells. From the more or less con- 

 tinuous, inconspicuous vulva, the vagina extends inward three-fifths the 

 distance across the body. It is muscular and more or less cutinized. The 

 medium-sized, tapering ovaries reach half way back to the vulva. 



Habitat: Beach sand, Squibnocket, Martha's Vineyard, Mass., U. S. A. Flem- 

 ming to glycerine jelly. Fig. 95. 



. . 

 96. Ypsilon exile n. sp. -1 V %i i6 L6 There are 



cervical setae about half as long as the neck is wide. Three flat, 

 minute, confluent lips bear a circlet of six forward-pointing or 

 somewhat spreading papillae around the mouth opening. Though 

 there are six nerves, one to each papilla, they are not precisely 

 equidistant, but seem to be arranged in three, somewhat distinct 

 pairs. Pharynx relatively strongly cutinized. In optical con- 

 tour, the anterior end of the onchium is more or less crescent- 

 shaped; this cup-shaped head is fixed obliquely on the strong, 

 straight element that forms the main portion of the dorsal wall x750 

 of the pharynx. The head of the onchium is yellowish in color. The neck is 

 cylindroid posteriorly, convex-conoid anteriorly. The oesophagus, narrow and 

 more or less cephaloboid in form, ends in a somewhat cylindroid cardiac swelling, 

 two-sevenths as long as the neck, and three-fifths as wide as the base of the 

 neck. At the nerve-ring, the oesophagus is one-third, just in front of the cardiac 

 swelling also one-third, as wide as the corresponding portion of the neck. The 

 lining of the oesophagus is rather prominent. The colorless musculature of the 

 oesophagus is of fine texture; in it, traces of oesophageal glands have been seen. 

 There is a distinct, refractive, cylindroid cardia, two-sevenths as wide as the 

 base of the neck. The intestine, which is thick-walled and has a faint, zig-zag 

 lumen, gradually becomes three-fourths as wide as the body. The cardiac col- 

 lum is one-third as wide as the body. The anus is elevated, and the rectum 

 is one and one-fourth times as long as the anal body-diameter. The intestinal 

 cells are packed with pearly granules, such as are often seen in Aphelenchus; 

 the largest of these are one-eighth as wide as the body. These granules tend to 

 be larger posteriorly than anteriorly, and sometimes appear to be polyhedral. 

 The posterior part of the body tapers from in front of the anus, is at first conoid 

 then convex-conoid, and ends in a spinneret one-sixth as wide as the base of 



