93 



281 



a greyish mass, containing many small oil globules. In this mass it has only been 

 possible to detect a brain, a large pear-shaped testis with a long ductus seminalis, 

 covered with long cilia. No prostata glands and no protrusile penis observed. Above 

 the testis a hyaline mass, containing many white quadrangular grains. No trace of 

 alimentary canal, excretory organs or antennæ have been detected. There are two 

 foot-glands. Five transversal muscle bands and four longitudinal muscles have been 

 seen. Length of male SO,«, of female 150//. 



I have only found one single specimen, found 3/V 22. The females were present 

 in millions in the algæ carpets; many eggs were laid but none which could be 

 regarded as male eggs. Some points in Gosse's description are very unintelligible. 



Metopidia solidus Gosse. 



Male: Wesclié 1901, p. 123. 



Wesché (1901, p. 123, textfig. 1 — 4) has observed the female. 



It is mainly described as follows. Carapace not well defined, without the smoothness 

 and symmetry that cliaracterises the lorica of the female; an anterior and posterior edge is 

 observed: form somewhat oblong or rounded. As in the female the foot is divided into four 

 segments. At the end of the second from the base is the ciliated orifice of tlie penis, while the 

 fourth carries the toes, tlie joint in the middle of the foot is not so Hexible in the female, 

 tlie toes are pliable and sometimes take a well-defined curve which shows on the lateral 

 view. The "Cowl" or "Pick" on the front is well developed; two eyes are visible, the cilia 

 are long, arranged as in the female. Dorsal antenna is well defined; lateral antennæ ap- 

 proximately in the same place as in the female. Owing to the presence of oil globules, and 

 the denseness of the lorica only little of the internal structure could 

 be seen. No lateral canals of the vascular sj'stem are observed; a testis 

 with spermatozoa was found. In one specimen a transparent sac was 

 seen in tlie dorsal region; this is interpreted as the remains of a di- 

 gestive system. Time February. Size 113^. As the size of the female is 

 140 to 170 fi the male seems to be remarkablj' large. 



Colurus bicuspidatus Ehrbg. 

 Male: Weber 1898, p. 623. 

 Weber (1898, p. 623, PI. 22, fig. 19—20) is the only one 

 who has seen the male. 



"La lorica est semblable à celle de la femelle, mais les bords 

 ventraux des deux plaques de la carapace sont moins convexes, moins 

 repliés sous la face ventrale et laissent entre eux une fente assez large, 

 même dans sa région moyenne. Le bord dorsal des sillons céphalicpie 

 et pédieux n'est pas échancré. La lorica, moins résistante que celle de 



la femelle, est marquée de deux plis transversaux obliques et parallèles. Le pied est com- 

 parativement plus long et plus vigoureux que celui de la femelle. 11 est tri-segmcnté et se 

 termine par deux doigts pointus, relativement plus courts que ceux de la femelle. Le pénis 

 fait saillie hors de la lorica, à la face dorsale du pied. Le bouclier céplialique est sendilable 

 à celui de la femelle, mais plus étroit. L'organe rotatoire ne comprend qu'une couronne ciliaire. 

 La tète porte deux petits yeux latéro-frontaux. Le tentacule dorsal est bien visible. Time: 

 August." 



Colurus bicuspidatus <J 

 after Weber. 



