54 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 50. 



This is the species which Travassos has regarded as identical with 

 his Paraspidodera unci7iata<. For reasons given in the discussion of 

 that species, it seems safer to regard the two species as distinct. On 

 the other hand, it seems quite likely, as far as the descriptions are 

 concerned, that Subulura houeti and S. uncinata 

 are identical, though they are kept separate here 

 on account of the different hosts and localities 

 and to await additional data. The only differ- 

 ence in size utilized in compiling the key is of no 

 significance. 



^ 



/-s 



SUBULURA BOUETl (Gendre, 1911) Travassos, 1913. 



Synonyms. — Heteralds houeti Gendre, 1911; 

 Subulura {Oxynema) houeti (Gendre, 1911) 

 Eailliet and Henry, 1914. 



Specific diagnosis. — Subulura (p. 52) : Body is 

 pale yellow and is attenuated, especially poste- 

 riorly, in both sexes. There are two small lateral 

 alae. The cuticle is finely striate. The cephalic 

 extremity is truncated and show^s no trace of lips 

 or sign of demarcation from the rest of the body. 

 The head bears six fungiform papillae, almost 

 equidistant in arrangement, four of them sub- 

 .median and two lateral, disposed in a circle 

 about the buccal orifice which is large, circular, 

 and yawning. The mouth cavity is large and 

 cylindrical, its base provided with three strong 

 muscular teeth covered with chitin. The pharynx 

 is short. The esophagus thickens gi-adually to 

 its posterior extremity w^here it presents a slight 

 swelling. The esophageal bulb is rounded. The 

 intestine, which at its origin is larger than the 

 esophageal bulb, follows a straight line without 

 notable variation to the anus. The excretory 

 pore occurs on the ventral surface at the union 

 of the anterior and middle third of the length of the esophagus. 



Male 9.55 to 11.10 mm. long and 440 to 480 /* thick. Esophagus 

 1/5.5 to 1/6 and tail 1/28 to 1/31.7 of total length of body. The pos- 

 terior region (figs. GO and Gl) is always curved toward the ventral 

 surface and terminates in a conical pointed tail, followed by a small 

 mucronate appendix. It is provided with a bursa, of which the alae 

 extended from the region of the sucker to the base of the caudal 

 appendix. The sucker is oval and is not delimited by a chitinous ring. 

 There are five pairs of preanal and six pairs of postanal papillae. 

 The first pair of preanal is submedian and is even with the middle of 



Fig. 59.— Subulura unci- 

 nata. Posterior ex- 

 tremity OF male; ven- 

 tral view. Enlarged. 

 After Schneider, 1866. 



