336 ERNEST CARROLL FAUST. 



Cercaria candelabra nov. spec. (Fig. 4.) 



Systematic position : stylet larva. 



Parthenita: sporocyst. 



Host : Planorbis trivolvis Say. 



Habitat and time of collection: drainage ditch, Urbana, 111., 



1918. 



Flame-cell formula: a? + 0' + 7' + a" + 0" = 3 + 3 + 3 + 3 

 + 3 or 15. 



Body 0.25 mm. long by 0.09 mm. wide; tail two-thirds to 

 three-fourths of body length. Integument heavy; body entirely 

 covered with spines. Oral and ventral suckers 44 n in diameter. 

 Stylet in roof of oral sucker 25 fj. long. Tail inserted into caudal 

 pocket with a lateral pair of about ten heavy spines each. 



Sporocyst simple, unbranched. 



Prepharynx short; pharynx simple; glands crowding paren- 

 chyma emptying into pharynx; esophagus moderately long; 

 ceca long, small, to subcaudal region of body. Mucin glands in 

 vitiform clusters, antero-laterad to ceca, opening through long 

 narrow ducts at sides of stylet. 



Excretory bladder consisting of proximal and distal vesicles 

 separated from one another by slightly muscular sphincter; 

 collecting tubule emerging from each side of anterior vesicle 

 with anterior tributaries from three triplet groups of flame cells 

 and with posterior tributaries from two triad groups of flame 

 cells. 



Cercaria furcicauda nov. spec. (Fig. 6.) 



Systematic position: furcocercous larva. 



Parthenita: sporocyst. 



Host: Anculosa carinata Brug. 



Habitat and time of collection: Rome, Georgia, 1918. 



Flame-cell formula: a + /3 + 7 = 2+2+2or6. 



Forked-tailed cercaria with body 0.26 mm. long and 0.12 mm. 

 wide; tail trunk equally long; furci two- thirds length of tail 

 trunk, extending at right angles to trunk. Anterior region of 

 body covered with minute spines. Oral sucker 48 /* in diameter, 

 directed anteriad; acetabulum 40 u in diameter, at beginning of 

 posterior third of body. Eye-spots wanting. 



