312 ORDER ANAXOXCHIA 



92. Trilepta guttata n. sp. -J. -5 -5 .5 ~~N . 4 >(?!5 - 4 " Cuticle naked except 

 for the cephalic and cervical setae. Lips probably three, and double, rather thick 

 and well-developed. When closed the pharynx appears as if longitudinally 

 ribbed. This appearance, however, may be due to the folding of the rather 

 massive lips, which close together and form a vestibule nearly one-half as long 

 as the remainder of the pharynx. Neck cylindroid. The cylindroid oesophagus 

 near the nerve-ring is one-half, and also finally one-half, as wide as the base of 

 the neck; its musculature is fine and its lining indistinct. There is an indistinct 

 cardia one-third as wide as the base of the neck. The thick-walled intestine, 

 set off by a collum two-fifths as wide as the neck, and presenting a faint lumen, 

 becomes at once two-thirds as wide as the body, and in cross-section is made 

 up of but few cells containing scattered to numerous, small, more or less uniform, 

 yellowish granules. Neither spinneret nor caudal glands have been distinctly 

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

 From the raised anus the tail diminishes rather suddenly, then tapers gently to 

 the middle, where it is about one-half as wide as at the base; thence onward it is 

 cylindroid to the terminus, which is one-third as wide as the base of the tail. 

 The two simple, slender, rather frail and more or less tapering, acute to sub-acute 

 spicula are arcuate or somewhat bent, and are one and one-half times as long 

 set Ib set Jot as the anal body-diameter. Viewed in profile their 

 proximal ends appear to lie dorsad from the body- 

 axis. The inconspicuous accessory piece lies paral- 

 lel to the spicula. There are no supplementary 

 organs. The ejaculatory duct is one-third, the vas 

 deferens one-half, as wide as the body. The cyl- 

 indroid testis is one-half as wide as the body, even 

 at its rounded, blind end. Oblong, fusiform, chro- 

 matin masses are to be seen in the sperm cells. 

 IIM OP Habitat: Sand, below low-tide mark Bathing 

 Beach, Woods Hole, Mass., U. S. A. Sublimate to balsam. Fig. 92. 



93. Anoncholaimus mobilis n. sp. l -V ^ l - 6 *"* l - z "The cuticle is 

 so very thin that it wrinkles on the inside of the curve when the body bends. 

 Though there are no true wings, there is a faint, clear wing-space about one-eighth 

 as wide as the body. The thin, flat lips resemble those of Oncholaimus. There 

 is a vestigial dorsal onchium opposite the bases of the cephalic setae, faintly 

 shown in the illustration. The neck is cylindroid. In the oesophagus near the 

 base of the pharynx there are scattered yellowish granules. The oesophagus is a 

 little wider at both ends than elsewhere. Near the pharynx it is two-thirds, at 

 the nerve-ring two-fifths, and finally three-fifths, as wide as the corresponding 

 portion of the neck. It has a distinct, refractive, apparently corrugated lining; 

 among its radial muscles there is more or less of yellow pigmented matter, which 

 occurs in straightish radial lines. There are at least two submedian glands in 

 the tissues of the oesophagus, emptying at the pharynx. The thick-walled intes- 

 tine is set off by a constriction half as wide as the neck, and has a faint ziz-zag 

 lumen; it becomes at once two-thirds as wide as the body, and in cross-section 

 presents about ten to twelve cells. There are numerous yellow granules of vari- 

 able size in the cells of the intestine, the largest being one-thirtieth as wide as 

 the body; owing to their arrangement there is a faint tessellated effect. From 

 the anus, the posterior lip of which is elevated, the rather prominent rectum 

 extends a distance one and one-fourth times as great as the anal body-diameter. 



