SUBGENUS MYLONCHULUS 



(S.s.467) 



The diameter of the cylindrical portion of the tail is about one-fourth that of the 

 body at the anus. Caudal glands 3, egg-shaped, opposite the anus. Spinneret 

 slightly apiculate and apparently unarmed. The eggs are evidently of large size. 

 A single egg, not yet passed on to the uterus, was four-fifths to five-sixths as wide 

 as the body, and about three times as long as wide. 



Common about the roots of sugar cane on various plantations on the island of 

 Hawaii. Flemming solution to glycerine. 



27. M. reversus, n. sp. This very interesting abnormal form possesses striae 

 that appear resolvable into rows of dots. Intestine about 6 cells in girth, faintly 

 tessellated. Tail more or 2 94 26 40' 1? 96 



less cylindroid in the pos- 2.2 2.3 27? 74 2. ** l>1 n 

 terior half, its terminus one-fourth to one-fifth as wide as 

 its base. Lateral fields two-fifths as wide as the body. The 

 eggs are of relatively large size, since an ovum not yet 

 passed on to the uterus is 5 to 6 times as long as the body is 

 wide. It is therefore likely that the eggs occur in the uterus 

 only one at a time. The relatively broad ovary tapers but 

 little; it contains about a dozen developing ova. 



Rio Janiero, Brazil, about the roots of Platonia insignis Mart. In general this 

 species resembles incurvus and minor, but is readily distinguishable by the form of 

 the sexual organ, and by the sparseness of the pharyngeal denticles, only a few of 

 which are to be seen. When the female sexual organs reduce to one, this remain- 

 ing one usually extends forward from the vulva. Here the reverse is the case; 

 hence the specific name. Flemming solution to glycerine. Fig. 41. 



28. M. obtusicaudatus Daday. Tail conoid, slightly arcuate; toward the end 



rather suddenly di- 

 #- ------ ........ -~-V\ /N ^ 7 M- _ 1?Z!_JL1^ 1<9 M minished in size. The 



spinneret well marked. 



Found at Berlinhaven, Island of Salao, New 

 Guinea, in fresh water. It seems probable 

 from Daday's description that there are 3 

 teeth in the pharynx, 1 dorsal and 2 smaller 

 submedian ones just at the base of the rasps. 

 Probably fhe junction between the posterior 

 and anterior elements of the pharyngeal walls 

 is unusually prominent ; this would account for 

 the "bogige leiste" mentioned in the original 

 description and shown in the original figure 

 along the anterior margin of the rasp. Fig. 

 42 (after Daday). Assuming Daday's drawing 

 to be more or less conventionalized, this species 

 might be regarded as identical with minor. 



29. M. brachyuris Biitschli. Amphids appear as transverse slits opposite the 

 onchus. Lining of the oesophagus strongly developed. Cardia plainly to be seen. 



28. 



'62 



18 



96. 





Intestine tessellated. 2.2 



Rectum half as long 274 i79 371 379 2.2 



as the anal body-diameter. Caudal glands more or less 



saccate, opposite the somewhat raised anus. Tail some- 



what arcuate. Spinneret pore a little to the dorsal side of 



the middle of the terminus. The vulva is a conspicuous 



feature, owing to the thickness of the walls of the vagina, 



which is one-half as long as the body-diameter. Series of 



