92 



The first specimens fouud were detached segments, and from these 

 the first description was made, batterer later found more complete 

 specimens and n[)oii these the species was founded. The specimens 

 were found in the intestines of the following species of deer, viz : Cer- 

 vus paludosus, C. rufus, G. simplicornis, G. Nambi, G. dichotomus. 



A translation of the original Latin description is as follows : 



Arhynchot(vni(c, Rostellum none ; mouth unarmed. 



Tceniajimbriata, Diesing. Tab. V, figs. 9-15. (Plate XIII is a copy.) 



Head obtuso tetragonal, large with liemisplierical angular botbria; ueck none; 

 body anteriorly lanceolate, with very short ciineate segments; posterior margin of 

 the upper entire, of the following crenate, of the last fimbriate on each side ; the lin- 

 ear fimbria} rounded at the apices. Genital apertures — ; length 6'" — 6"; width 

 1 — 3'". Mature segments, separate, 1'" long, 2'" wide, with lanceolate fimbriae. 



This description was necessarily imperfect, from the lack of abundaut 

 material, but is nevertheless sufficient to enable us to identify the pres- 

 ent species with it. Fortunately, too, excellent figures enable us to 

 clearly understand the fimbriate character of the species. At present 

 this is the only species known to possess this character. Though char- 

 acters founded on form are of doubtful value, until more decided differ- 

 ences are determined between the fimbriate Ucnia of deer and those of 

 sheep, this decidedly strong character must serve to keep the two to- 

 gether. Besides, there are no strong reasons why the two should be 

 separate, for each is of about the same size, a fact which we would 

 scarcely expect in the same parasite living in hosts of different genera; 

 and each is also found in hosts of similar body temperatures, habits of 

 life, and of feeding. That they are found in far-separated localities need 

 be no serious objection, for the land connection of North and South 

 America would permit of the infection of deer of both continents with 

 the same species of parasites. 



Twnia fimhrinta is lanceolate when contracted, linear when relaxed. 

 It is quite thick, the fimbriae on the contracted specimens presenting 

 the appearance of plush. The segments can only be distinguished on 

 the more relaxed specimens. Adult si)ecimeus are from 15 to 30""' in 

 length and about 8"'"' in width. Immature specimens range from less 

 than 5""" upwaids. The greatest width is about 2*='" from tlie free end, 

 from which point the segments become narrower. There are at the free 

 end of adult specimens from three to four or more segments which are 

 of nearly equal width, which have lost their contractility and are in the 

 process of being shed. The shedding of segments begins in youngest 

 specimens and continues throughout the life of the parasite. 



The head or organ of attachment is depressed and tetragonal and 

 quite large, sitting on the neck like a pin-head; it is from 1 to 1.5'"'" 

 wide, bookless, and has four very large suckers. The substance of these 

 cups forms the greater part of the head. 



The neck or the part where segmentation begins is very short in con- 

 tracted specimens, but can be seen in the relaxed condition. The seg- 



