462 



Mr. H. A. Baylis on new 



The genital pore-; are irregularly alternating. The cirrus- 

 sac is pear-shaped and measures 0*125 nun. long and 0'04 mm. 

 in thickness at its widest part, which is near the inner end. 



There are twelve or more testes in a compact group in the 

 middle of the segment. The female genital apparatus calls 

 for no special comment : the uterus (tig. 3, Ut.) shows the 

 usual more or less complete division into two lateral portions, 

 and a well-developed paruterine organ (fig. 3, P.) is present 

 in front of it in the posterior segments. The ova do not 

 appear to pass into the paruterine organ until after the 

 separation of the segments from the strobila. The oncho- 

 spheres measure 28 fju in diameter. 



5. Davainea debilis, sp. n. 



Host : Anastomus lamellijerus. (Open-bill Stork.) 

 Of this species the collection contains only one specimen, 

 which measures about 45 mm. in lengtli. The posterior 

 segments are much contra-jted, and the length actually 



Fi<r. 4. 



Davainea debilis ; diagram of th-e genital cloaca and terminal portions of 

 the genital ductd. (Reconstructed from horizontal sections.) The 

 overlapping lateral borders of three consecutive segments are seen. 



C, cirrus; Cl.i, distal non-muscular portion of genital cloaca; CI.2, 

 proximal muscular portion of same ; C.S., cirrus-sac; F., vagina; 

 V.D.^ vas deferens. 



attained would probably be much greater. Anteriorly the 

 worm is extremely slender, but it increases rapidly in width 

 until the posterior segments measure about 3 mm. across. 



The scolex measures only 0*2 mm. across and is very 

 feebly developed. The suckers appear as mere cushion-like 

 thickenings. They were apparently armed with hooks about 



