41 



229 



que je puisse atTirmer l'absence de la (iiiatrième. Le tube digestif existe, niais en cid-de-sac et 

 sans niastax; on n'y peut distinnuer que deux régions, la i)rc'mière llanquéc juste derrière 

 la couronne de deux masses granuleuses, d'apijarance glandulaire, la seconde à parois 

 uniformément minces, renllée et terminée par deux ligaments (|ui semblent aller se confondre 

 avec les muscles longitudinaux. Ce tube digestif n'est probablement pas 

 fonctionnel; du moins était-il entièrement vide chez mon individu. Les 

 deux masses latérales représentent-elles les glandes gastriques? Il est 

 beaucoup plus probable, étant donné leur forme et leur rapports, qu'elles 

 correspondent à celles que j'ai décrites dans le mastax. Le testicule oc- 

 cupe la moitié postérieure du corps; il est globuleux, à parois minces, 

 renferment de nombreux spermatozoïdes de grande taille qui s'y remuent 

 avec vivacité. De part et d'autre de son canal déférent existent deux petites 

 niasses rondes qui sont les glandes annexes dites prostatiques. Je n'ai 

 pas vue le pénis evaginé." 



Finally de Beauchamp mentions IhalOtoglena papillosaEhrhg. 

 may perhaps be identical with the male of Eosphora digitata. 



The animal is common in many of the ponds near Hillerød; 

 I have met with the male several times and convinced myself that 

 I was only able to add little to the description of de Beau- 

 champ. I onlj' remark that I have not been able to observe any 

 contractile vesicle; I have counted five transversal muscle bands; 

 the two small glands on the sides of the rudiment of the mastax 

 are found. As well known Eosphora digitata is a slowly swimming 

 or creeping animal, and the male does not move much faster 

 than the female; the hyalinitj' of the male is much greater than 

 that of the female, but seen with a low power it much resembles 

 a young female. 



Copeus labiatus Gosse. 



Male: Weber 1897 p. 92. PI. IV fig. 6. 

 Tab. II, fig. 1. 



The mainpoints in Weber's excellent description are as follows: 



Eosphora diijitata r^. 

 Ehrbg. after de Beau- 

 champ. 



Cuticula thin, homogeneous. The general form of the male is that of an elongated cy- 

 linder, rounded in its anterior part, thickest in the middle and attenuated behind, ending in 

 a foot with two short toes between whicli, as in the female, is placed a little "éperon". Two 

 normal foot glands. The form of the body differs very nuich from that of the female which 

 is much broader behind, abruptly linishing with a tail and well marked foot, the tail in the 

 male being almost absent. Head a little broader than the forepart of the body. No gelatinous 

 cover which is so characteristic of the female. No alimentary canal, only oesoi)hagus 

 represented by a transparent mass. Wheel-organ strongly reduced, only a single wreath of 

 cilia, two feebly developed ears; it is doubtful whether there exists a ventral lij); the muscle 

 system consists of a series of longitudinal nuiscles, retractors of the wheel-organ and of the 

 foot, of muscles for the penis and suspensor muscles of the testis. A threelobed brain is found; 

 the central part is pyriform and carries the eye. There is a dorsal antenna and two large 

 lateral antennæ, either with a tuft of cilia or with a single one. Four iiyriform cells behind 

 the wheel-organ and without connection with the brain. The excretory organ consists of two 

 fateral canals each carrying live vibratile tags; contractile vesicle doubtful. Testis pyriform, 



U. K. D. Vidensk. Sclsk. SUr.. naturv. og matheni. Afd., 8. Række, IV, 3. gj 



