290 s. GOTO. 



side, proceeds anteriorly and, undergoing a few convolutions on 

 the left side of the ootyp, opens into the vesicula seminalis. 

 The terminal portion of the vas deferens is always somewhat en- 

 larged in contradistinction to the next adjoining portion, which 

 is exceedingly narrow. The seminal vesicle is a pear-shaped 

 sac lying in the left angle between the pharynx and the anterior 

 intestinal arc, with its smaller end directed posteriorly and 

 opening into the genital atrium. The vas deferens opens into 

 the seminal vesicle at its middle, on the inner side. 



The genital atrium is a spindle-shaped, elongated cavity 

 appearing like the direct continuation of the uterus, extending 

 between the point of union of the uterus and seminal vesicle and 

 the common genital pore. The latter lies on the ventral side, close 

 to the lateral margin, in the constriction dividing the anterior 

 glandular portion of the body from the rest. I call it the genital 

 atrium, because it appears to be lined by a membrane closely 

 similar to the investing membrane of the body. The porus 

 genitalis communis is exceedingly small. 



There is no vagina. 



Habitat. — Gill of a sucking-fish {Rémora brachyptera), 



Loc. — Newport, K. I. 



The present species combines the characters of several genera. 

 In its general aspect it somewhat resembles Fridellicianella ovicola 

 Brandes ['94], but is distinguished by the absence of the 

 vagina (" Seitenwulst " of Brandes*). It resembles Phyllonella in 

 having two testes and the mucous glands at the anterior end 



* If I may put ou my own interpretation to the observations of anotlier, I may state 

 liere that, in my opinion, the duct regarded by Brandes as the genito-intestinal canal is not 

 so, but must be a true vagina cori'csponding to that of the Gyrodaclylidae in genei'al, to whicli, 

 as tlie author thinks, the species must be reckoned, and opening on the " Seitenwuist." My 

 statement in the text is based on this opinion. 



