278 



90 



the female the toes are decun'ed, sharp and short. A large sperm-sack fills the greater part 

 of the bodj'-cavity; there are no manducatory organs. It is a remarkablj- large male 233 /<, 

 the size of the female measuring 282 /u. It is described as very soft and flexible, 

 contracting and elongating itself and in fact contorting itself into all sorts of 

 shapes and sizes. Time April— May." 



Diaschiza Hoodii Gosse. 

 Male: Dixon-Nuttall 1903, p. 131. 

 DixoN'-XiTTALL (1903, p. 131, PL II, fig. 5i) has described the male 

 as follows: 



'"It has the four plates, the usual clefts between them and the cervical 

 eye exactly as in the female. The toes are fairly long in proportion to the trunk, 

 thin and decurved. The sperm-sack fills the greater part of the trunk. It is with- 

 out manducatory organs. Size 113//, that of female 194//. Time November." 



Salpina spinigera (Ehrbg.) 



Tab. V, fig. 2. 



\ ^ Description. Lorica much resembling that of the female. The hind 



Gosse (J after ^ ° 



Dixon-Nuttali. border of the lorica is straight, provided with two strongly curved spines. 

 The wheel-organ, the brain, the eye and the dorsal antenna are in ac- 

 cordance with those of the female ; the foot is remarkably well developed, of almost 

 quite the same shape as in this sex. From the testis and to the eye spot, where the 

 mouth is to be found in the female, runs a hollow band in which is a peculiar dark 

 mass, pointed in front. As far as I can see, this is a remnant of the mastax, rudi- 

 mentary, without any trace of teeth. The testis is very large, globular, provided with 

 a very long ductus seminalis; two prostata glands; the ductus seminalis is coated 

 with long cilia, during the mating process it is most probably turned inside out; 

 the genital opening with a bunch of bristles. Above the testis a globular mass with 

 opaque white, quadrangular grains. No trace of the excretorj' organ observed; as 

 Weber has observed it in S. brevispina it certainly exists; according to him there 

 are five vibratile tags, but no contractile vesicle. A large oil globule is situated dor- 

 sally in the posterior part of the body. As in the female it is very difficult to see 

 any trace of the muscle system and like Weber I have not ventured to give any 

 sketch of it. There are two small foot glands. Size of male 150//, of female 180//. 

 It is only with some hesitation that I refer this male to S. spinigera. I have only seen 

 a single specimen found 20, V 22 in algæ carpets in Strødam moor near Hillerød. 5. spini- 

 gera was very common in the sample and during the whole season the main form in the 

 little moor. 



Salpina mucronata Ehrbg. 



Male: Weber 1897, p. 98. 

 — 1898, p. 558. 

 Tab. V, fig. 1. 



Weber (1897, p. 98, PI. 4, fig. 3; 1898, p. 558, PI. 21, fig. 7) has seen a 

 single male. 



J 



