.164 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Under this name I introduce a single specimen, found 

 among seaweeds collected between tide-marks at Port St. 

 Mary, which conforms in all essential details with the 

 descriptions of v. Graff and Gamble. 



Length *6 mm., white, gut slightly discoloured by 

 yellowish food-stuff. Pharynx central (not in front of 

 centre as described by v. Graff and Gamble, but this 

 difference is perhaps due to unequal contraction in my 

 specimen) . Ehabdites very densely distributed in anterior 

 end, forming two very well marked lines between the 

 eyes; The eyes are small and reniform, provided with 

 lenses, body pointed in front, rounded behind, genital pore 

 close to posterior end of body. Testes lateral, elongated ; 

 seminal vesicle kidney shaped, the penis being attached 

 to the concave side (fig. 1). Penis consists of a proximal 

 muscular portion and a distal chitinous tube which is 

 slightly more curved than in v. Graff's figure. The atrium 

 is extremely large and conspicuous, copiously supplied 

 with glands. 



The female reproductive organs were not developed in 

 my specimen. It is strange that in all the recorded 

 occurrences (as far as I am aware) of this species, viz., 

 von Graff's (Monographic, p. 310), Gamble (3), p. 26, 

 and the present note, only single specimens have been 

 found. 1 have preserved this specimen as a microscopic 

 preparation, by Dr. M. Braun's method. (" Die Ehabdo- 

 coeliden Turbellarien Livlands" ; Archiv. f. d. Naturkunde 

 Xivlands, &c, Bd. X., 1885.) 



Family Peoboschxe. 



Pseudorhynchus bifidus (M'Intosh). 



Common between tide-marks at Port Erin and Port St. 

 Mary. Some of those found on the Breakwater measured 

 as much as 22 mm. in length, although v. Graff gives 



