1050 MR. U. J. ORTLEPP OX THE 



and the right 305 /.t long; they are of equal thickness, 32^, and 

 they possess a more or less uniform thickness in their anterior 

 four-tifth, the last fifth tapering to a sharp point. 



Female. 



The female from Felis tigrina is 47 mm. long ; teeth both large 

 and of equal size, the outer triangular ; oesophagus 1/7*3 of body- 

 length, vulva situated 18'5 mm. from anterior end, the female 

 genitalia as for Ph. prce2niiialis, and the cuticle is not reflected 

 over the tail. 



Host : Felis concolor. Stomach, Brazil. 



Type males in bottle 1074 (number on stopper) in the Vienna 

 Museum. 



With regard to the name of the host, the legend on the bottle 

 was somewhat indistinct and appeared somewhat like Felis 

 casiolaris, but as no feline of this name is known, 1 take it to 

 mean Felis concoloris. 



I have placed this species among the didelphoid forms, because 

 the female described may belong to this species, in which case 

 it would come into the group characterised by Ph. prce2nitialis 

 V. Linst. 



(18) Physaloptera acuticauda Molin, 1860. (Text-fig. 26.) 



The material on which the study of this species is based is the 

 type material deposited in the Vienna Museum. This material 

 has also been studied by von Drasche. All the specimens were 

 in an excellent state of preservation. 



The cuticle is very finely striated transversely, and anteriorly 

 is partl}^ reflected over the lips. In each lateral line, just behind 

 the level of the posterior end of the muscular tesophagus, a small 

 and spike-like cervical papilla is situated, and on the ventral 

 surface about 100 /a further back is the opening of the excretory 

 organ. 



The lips are somewhat rounded in lateral view, and each 

 carries only two teeth, a large and triangular outer tooth, and 

 immediately internal to it a smaller membranous tooth having 

 its free end tripartite. In the subdoi-sal and subventi'al lines of 

 each lip there is a conical papilla. 



The oesophagus, which immediately follows the lips, has its 

 anterior muscular part slightly thinner than the following- 

 glandular portion : in the male it forms about l/5'l of the total 

 bodj^-length and in the female about l/7th. The glandular part 

 forms about l/7th of the oesophagus, and is surrounded by the 

 nerve ring at the level of its posterior quarter. 



Femcde. 



The females have a length of about 30 mm., with a maximum 

 breadth of just over 1 mm. The body tapers in its anterior half, 

 but posteriorly it narrows only in the vicinity of the tail, which 

 is a conical structure about l/56th of the total body-length, and 

 has its caudal pores situated in its posterior third. 



