ANAXONCHIUM, BOLBOLAIMUS 



319 



1.6 7.6 17.1 . . .'*. . . 90.. ?11 .. 



99. Anaxonchiwn liiorium n. sp. Li ' Vi-' 2.3 ' ' 2.47^*1.9 ' Cuticle thin, 

 but considerably thicker near the head. Striae resolvable with difficulty into 

 dot-like elements, which are close together on the body, more distant on the 

 head. The striae are altered on the lateral fields so as to give rise to a ladder-like 

 pattern, with the "rungs" very close together. Cephalic setae two-jointed. No 

 pores are seen in the cuticle; nevertheless, they may have been present and escaped 

 notice. The lips are thick and double. In the single male specimen examined, 

 the conical branches of the lips end in minute setae, each about as long as the 

 labial setae, and terminating in a "blob, " this latter hardly an artefact. Dor- 

 sal onchium opposed on the ventral side by several irregularly arranged, small 

 denticles, among which probably two submedian ones dominate. Apparently 



somewhat similar denticles occur 



setlb(6) 



trm 



behind and above the dorsal 

 onchium. Amphids peculiar, large, 

 faint. The plain oesophagus, near on 

 the nerve-ring is one-half, and fin- 

 ally three-fourths, as wide as the 

 corresponding portion of the neck. 

 Its lining appears corrugated; its 

 colorless musculature is more or less 

 coarse, but there seem to be no indi- 

 cations of the presence of glands, 

 and there is no distinct cardia. The 

 thin-walled intestine, which has a 

 rather faint, though distinctly visi- 

 ble lumen, becomes at once half as *750 

 wide as the body, and in cross-section would present four to six cells. Cardiac 

 collum one-half as wide as the neck. The cells of the intestine contain scattered 

 yellow granules of variable size, having a diameter about equal to the width of 

 two annules of the cuticle. The tail tapers from the anus, and is at first conoid 

 then cylindroid in the posterior third, where it is about one-fourth as wide as at 

 the anus. A few, rather small, tapering, subacute setae occur on the tail. The 

 lateral fields are about one- third as wide as the body. The non-granular ellip- 

 soidal renette cell lies only a short distance behind the neck, and is three-fourths 

 as long as the body is wide, and one-third as wide as long. The rather pronounced 

 clavate ampulla empties through the distinct pore lying close to its anterior end. 

 The nerve-ring is accompanied by obscure nerve cells. The yellowish spicula 

 are guided by two separate, strong, rather wide, more or less arcuate, somewhat 

 shoe-shaped pieces near the anus, with a single median piece between and behind 

 them. Ejaculatory duct one-fourth, testis two-thirds, as wide as the correspond- 

 ing portion of the body. 



Habitat: Marine; Belmar, N. J., U. S. A., below low tide mark in beach sand. 

 Female unknown. Anaxonchium bears considerable resemblance to Cyatho- 

 laimus, but differs, among other ways, in the almost obsolete amphid (?), the 

 reflexed testis, and in the large number of small supplementary organs. Fig. 99. 



lOOa. Bolbolaimus pellucidus n. sp. Type species. Naked except for the setae 

 on the head; possibly there are very inconspicuous wings. Lips subdistinct, the 

 region elastic and finely subdivided. Margin of the lip-region serrated by the 

 forward projection of about fifteen papillae (?) with minute bristles outside the 

 serrations. The appearance is as if each papilla is armed with a pair of minute 



