66 



eyes, hitherto uncertain, is made abundantly evident by the figures, 

 both of Gasocaris and of XJronectes in the »Fauna der Gaskohle (f. 



While giving due weight to the great experience which Prof. 

 Fritsch brings to the deciphering of these very difficult fossils, it is 

 hardly possible to accept as final the restorations which he offers. 

 Thus, in the case of XJronectes, the presence of seven abdominal 

 somites (besides the telson), and of two pairs of maxillipeds in front 

 of the seven pairs of thoracic legs, are characters so exceedingly 

 peculiar as to preclude direct comparison with any other known 

 crustacean; and, without attaching so much importance to the absence 

 of thoracic exopods , there may perhaps be found room for some doubt 

 on this point also. Prof. Fritsch finds (as I had previously suggested) 

 that the apparent forking of the legs in the well-known figure of 

 Uronectes fimhriatus is really due to an overlapping of the legs of the 

 two sides. He makes no reference however to the fact that Jordan 

 and Meyer further describe and figure (Palaeontographica IV. 1854) 

 very distinct traces of large appendages springing from the bases of 

 the legs, where one woiüd naturally expect to find the exopods. In 

 the case of Palaeocaris also Prof. Fritsch states that the legs are uni- 

 ramous, overlooking, apparently, Packard's explicit evidence to the 

 contrary 3. On the other hand it is quite possible that Gasocaris, with 

 its strongly built legs suggestive of creeping habits, was really devoid 

 of exopods. 



Be this as it may, I would point out that Prof. Fritsch to some 

 extent misinterprets my position. My contention was for the affinity 

 of the fossil forms not with the Schizopoda but with Anaspides. Many 

 carcinologists now reject the Schizopoda as a natural group and in 

 any case the place of Anaspides among them is open to question. As to 

 the fossil genera, the absence of exopods no more disproves their 

 relationship with Anaspides than the possession of them would suffice 

 to justify their inclusion within the Schizopoda. 



2. Zur Kenntnis der myrmecophilen Antennophorus und anderer auf 

 Ameisen und Termiten reitender Acarinen. 



(121. Beitrag zur Kenntnis der Myrmecophilen und Termitophilen.) 

 Von E. Wasmann S. J. (Luxemburg). 



eingeg. 6. October 1901. 



1877 beschrieb G. Haller einen neuen Gamasiden, der von 

 Herrn Dr. Uhlmann in Münchenbuchsee (Kanton Bern, Schweiz) 

 als Parasit auf )) Formica nigra« gefunden worden war, unter dem 



3 On the Gampsonychidae. Mem. Nat. Acad. Sc. Washington, 1886. III. 



