300 112 



culiar, differing from every thing, that I have hitherto seen. In the same sample I 

 soon found a few males; thinking that the female could be found again, I thoroughly 

 studied the males for some days. On returning to the pond however, I was unable 

 to find a single specimen more, neither male, nor female. In the autumn of 1921, 

 during the whole of 1922, and in the spring of 1923 the pond was under regular 

 observation, but all efforts were fruitless. For a time I supposed that a closer ex- 

 amination of the female would show that I had a Harringia (= Dinops) before me. 

 As I am sure however, that the two dorsal antennae are united in a single dorsal 

 organ, and a cursory examination of the mouthparts showed no resemblance to those 

 of Harringia, this was not the case. The wheel-organ of the female was quite in 

 accordance with that of Microcodides, and the hindpart of the body showed the same 

 parallel furrows which are so characteristic in Rousselet's figure. 



Flosculariidæ. 



The family comprises the three genera Floscnlaria, Stephanoceros and Apsihis, 

 all three with onlj' very slight mutual relationship. Of many of the species it is 

 stated that the males have been observed, but they are neither described nor figured. 



Floscularia proboscidea Ehrbg. 



= F. campanulata Dob. 



Male: Hudson 1875, p. 45. 



Hudson-Gosse 1889, p. 52. 

 Weber 1888, p. 10. 



— 1898, p. 277. 

 Montgomery 1903, p. 363. 



HuDSON-GossE (1889, p. 52, PI. I, fig. 1 c.) 



Tlie sperm sack and penis are indistinctlj' shown in the figure, but the dead specimen 

 from which I drew the figure was so lately hatched that its cuticle was more than usually 

 opaque. 



Weber (1888, p. 10, PL 26, fig. 2; 1898, p. 277, PI. 10, fig. 11). 



"Le male de F. proboscidea est rare et je n'ai réussi à en trouver qu'un seul exemplaire. 

 Il est de petite taille et ressemble à une toute jeune femelle. Il a la forme d'un sac allongé, 

 tronqué aux deux extrémités. Pied très court et obtus. Le sommet de la tête est très légèrement 

 divisé en lobes et porte une couronne de cils fins et longs. Les deux yeux sont bien visibles. 

 Le système digestif fait défaut, le système excréteur est réduit, deux canaux latéraux, com- 

 mençant dans la tête et se terminant de chaque côté du pénis au dessous du pied. La majeure 

 partie de la cavité du corps est occupée par un testicule granuleux. Le pénis est court, dorsal, 

 muni d'une couronne ciliée à son extrémité. Le système musculaire est composé de deux 

 forts muscles latéraux, rétracteurs de la partie antérieure du corps, la tête, et des muscles 

 fins du pénis et du testicule." 



Hudson's observation, that the males pierce the tube, Weber (1888, p. 11) regards as 

 highly improbable. 



Montgomery (1903, p. 363, PI. 21, fig. 36). Out of the more exhaustive picture 

 we point out the following facts. 



