M. A. Stecker on a new Genus of Arachnida. 241 



show clearly the near relationship of the Cyphophthalmidge on 

 the one hand with the Phalangiidas, and on the other with the 

 Chernetidte ; and I believe that I have demonstrated it. 



I now divide the third section of the Autarachnea, i. e. the 

 section Arthrogastra, in accordance with their affinities, into 3 

 subsections and 6 orders, as follows : — 



III. Aethrogastra. 



1 . Solifugce. 

 a. Galeodere. 



2. OpiUonea. 



h. Phalangiidee. 



c. Cyphoplithalniida\ 



3. Didactyla. 



d. Chernetida?. 



e. Phrynidai. 



f. Scorpionidaj (the most highly organ- 



ized order of Arthrogastra)*. 



The order Cyphophthalmidaj may be defined as follows : — 



Ordo CyphophtlialinidsB, Joseph. 



Corpus oblongo-ovatum ; eephalothorax cum abdomiue coahtus, non 

 divisus, abdomen aunulis octo compositum. Antennae chelata^ 

 tribus articulis compositae. Palpi duo filiformes, apice unguiculo 

 uno armati. Pedes octo antrorsum vel retrorsum gressorii, sim- 

 plici iinguiculo terminati. Oculi in gibbis coiiicis, ex utroquo 

 thoracis latere promiuentibus positi. Respiratio trachealis. 



(Body oblong-ovate ; eephalothorax coalescent with the 

 abdomen, not separated ; abdomen of eight segments. Cheli- 

 cera three-jointed. First pair of maxillary paljn filiform, with 

 one claw at the apex. Eight legs, fitted for walking forwards 

 and backwards, furnished with a simple claw at the apex. 

 Eyes placed upon conical tubercles, arising upon both sides 

 of eephalothorax. Respiration tracheal.) 



In accordance with the external habit of the two genera, 

 the whole order is divided into two families {Cyphojihthcdmiticr, 



* As we refer the Pautopoda, Tardigrada,, aud Linguatulina to the 

 Pseudarachnea, we have as the first section of the Autarachnea the Acarina, 

 as the second the Araueina, and the third section is then formed by the 

 Arthro<?astra. 



