Contributions to th)e Rnowleòge 



of ti)e 



Brasilian [5elminth)ological S'auna 



XVL Cruzia tentaculata (RUD., 1819) 



by 

 (With plate 47-50). 



The Ascaris tentaculata of RUDOLPHI 

 is one of the three species included by 

 SCHNEIDER in his genus Oxysoma. 



RAILLIET and HENRY, when studying 

 the Oxyuridae in 1916, found that the type 

 of the genus Oxysoma did not correspond 

 to Fusaria brevicaudata ZEDER, but rather 

 to a new species for which they proposed 

 the name loiiges/nculu/n. The generic name 

 Qf Oxysoma, being preoccupied, was then 

 changed by the same authors to Oxysoma- 

 tiiim (IQIJ). 



As we saw in 1917, the two remaining 

 species of the genus of SCHNEIDER must 

 become part of entirely different genera 

 and families. The Oxysoma leptuni has al- 

 ready been studied in detail by us (1918) 

 and LANE (1914). 



For O. tentaculata we proposed in 1917 

 a new genus and family, which we will 

 now consider in more detail, 



Cruzidae TRAVASSOS, 1917. 



Characters: Oxyiiroidea with imcomple- 

 tely polymyarian musculature, rigid eso- 

 phagus, with a large bulb and ample ves- 

 tibule; intestine with a marked anterior di- 

 verticulum; median vulva; two nearly equal 

 spicules and gubernaculum; female genital 

 apparatus didelphic. 



Habitat: Large intestine of marsupials. 



Type genus: Cruzia TRAVASSOS, 1917. 



This family has a great resemblance to 

 the Subulurinae and also in some ways to 

 the Kathlanidae, as there is a vestige of a 

 bulb just above the true bulb. 



The structure of the digestive apparatus 

 is quite curious and separates it from any 

 other group of the Oxyuruidea, since, aside 

 from having an uitestinal diverticulum di- 

 rected to the front, it presents the anterior 

 portion differentiated in a curious way, sho- 



