304 



ORDER AXONCHIA 



X750 



ndtm 



as wide as the body; its cross-section would present only about two cells. These 

 cells contain scattered yellowish granules of uniform size. From the incon- 

 spicuous anus the rectum extends a distance longer than the anal body-diaineter. 

 The pre-rectum is about four times as long as the corresponding body-diameter, 

 rmJb K *rm V* JftJfr^V* -4 9.5 19. '-si." 97. and is readily distin- 



X ^ " g U i s hed from the rest of 



.4 12. 19. -x- 1 96. gz the intestine by differ- 

 l - 2 - 4 '^ 2-~rx,i. "ences in structure; it 

 appears more transparent and more nearly colorless. 

 Renette unknown. There seem to be very faint indi- 

 cations of the presence of a lateral wing. The lateral 

 fields are about one-fifth to one-fourth as wide as the 

 body. From the rather inconspicuous vulva, the 

 vagina, which is well cutinized, extends inward and 

 'backward half way across the body, where it joins the 

 single uterus which extends backward. The reflexed 

 'ovary reaches half way back to the vulva, and con- 

 tains ten to twenty ova arranged for the most part single file. There is an ante- 

 rior rudimentary branch to the uterus which is a little longer than the corre- 

 sponding body-diameter. Eggs unknown; judging from the full-grown ova they 

 are about as long as the body is wide and about half as wide as long. Single male 

 supplement two body-diameters in front of the anus, four times as far away as 

 the anal pair. 



Habitat: Brackish soil on the banks of a marine estuary, Los Patos, California, 

 U. S. A. Differs from Dorylaimus in the form of the spear, and the oesophagus. 

 Most species of Dorylaimus have two ovaries. Differs also in the reduced num- 

 ber of supplementary organs; outside the anal pair, there is only one. Differs 

 in material respects also from Tylencholaimus. to which it may be compared. 

 Fig. 84. 



.7 7.2 ; 20. "'??'" 99- 



85. Leptonchus granulosus n. sp. L -~ 2 ; 5 J - 3 ' 4 2 -^ " Cuticle naked, 

 its transverse striae resolvable with difficulty into exceedingly minute dots. 

 One of the inner striae seems to correspond to about four of the outer. Cuticle 

 also possessed of inconspicuous longitudinal striae. Neck 

 conoid. Amphids broad, faint, somewhat stirrup-shaped, fP 

 their anterior contours opposite the labial constriction. The 

 oesophagus begins as a tube about one-fourth as wide as the 

 base of the head, and continues to have this diameter until 

 it finally expands to form the clavate or elongated pyriform 

 cardiac swelling, which is about one-half as wide as the base 

 of the neck. There is an inconspicuous conoid cardia about 

 one-third as wide as the body. The oesophagus is therefore 

 essentially tubular throughout most of its length. It is, or. 

 however, a trifle wider near the middle, in the neighborhood 

 of the nerve-ring, usually behind it, and at this point there 

 appears to be a slight alteration in the lining, suggesting in the faintest possible 

 manner vestiges of a median bulb ; at its widest part, however, the slender part 

 of the oesophageal tube is not more than one-fourth to one-fifth as wide as the 

 corresponding portion of the neck. At its narrowest part, just in front of the 

 cardiac swelling, it is about half as wide as it is at its widest part. The lining 

 of the oesophagus is not a conspicuous feature. The intestine, which becomes 

 at once fully three-fourths as wide as the body, is made up of cells of such a size 



