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particules). The animal keeps its hind legs curvecl under its abdomen; 

 these legs therefore appear short. All the legs bear strong claws. 



Moniez ideutifies Acarus fucorum Fabr. with Gamasus marinus 

 Brady. I fully agree with hira. But why then has he called the 

 animal Zercon marinus (Brady), in stead of Zercon fucorum (Fabr.)? 



The systernntic position of the animal in not yet fixed, as 

 females are still unknown. Moniez calls the auimal Zercon. This 

 however is wrong, because the genital aperture of the male is 

 situated between the sternal shield and the mentum. Therefore 

 the auimal must be placed in one of the following subfamilies: 

 Parasitinae, Laelaptinae, Dermanyssinae, Spinturnicinae, or Caele- 

 nopsinae. Most probably its place is in the Parasitinae. 



Though I am incliued to cousider the animal as a Hydroga- 

 masus, I provisorily place it in the genus Parasitus 1 and I am 

 obliged to call it Parasitus marinus (Brady), as the specific name 

 fucorum is already preoccupied in the genus Parasitus. 



If the female will prove that the animal belongs to another 

 genus, the specific name of the animal must become fucorum (Fabr.). 



Brady has well figured the nymph and a few details, but he 

 has not well interpreted what he saw. E. g. the horns of the 

 hypostome are called by him »styliform appendages between the 

 mandibles and the palps". As the mandibles in his animal were 

 thrown forward, he calls them : »longer than the palps". Two 

 masses of opake particules in the intestinal track are called by 

 him »eyes". The mandible figured by him apart, is probably that 

 of an adult female. The figure of the animal in toto is probably 

 that of a nymph, He has positively observed males: »In some 

 specimens the lower parts of the legs are liable to run out into 

 irregular subspinous processes". (See Plate VIII, fig. 1). 



Moniez has tolerably well described and figured parts of the male 

 and nymph. He is hesitating to call the animal Gamasus, because 

 of the singular epistoma; but if we compare the different epistomata 

 of the species of Parasitus, we are obliged to ackwowledge that 

 the epistoma is the last detail to recognise the genus Parasitus ! 



I present to my readers new figures of the male (PI. VIII, fig. I — 5). 



