Myriapo'la from Derbyshire. I)!' I 



A form intermediate in organization between Litlw/>in.<i and 

 GeopJnfii/t. 



A k;\v, Bakewell (li:*lr;ct, ourselves, 1018. 



Family GeopMlidae, Leacli, 1814. 

 Genus GeOPHILUS, Leacli, 1814. 



25. G. cnrpophagutj [^(^acli. 



Syii. (^i. sodalis, Ber^rsoe et Meinert. 

 G. condyloynster, Latzel, 1880. 



41 mm. 



This is a dark brown species of our well-distributed f^enus 

 Geoohihts. Tlie ]3egs of the anterior ventral plates are 

 prominent; and the corresponding sockets comparatively 

 small. We have not ourselves met with this species in the 

 county. 



*i)ove Dale, B. S., 21/iv,/14 (J.). 



2<). G. lonfji'cornis, Leach, 1<514. 

 Syn G.Jlavus (De Geer, 1778). 



40 mm. 



A detailed examination of examples of this species will 

 show thfit the true peg-and-socket or " carpophagous " struc- 

 tin-e is wanting in the vential plates of the animal's body. 

 This ciiaractfr is present in all its known Ensflisli congeners. 



*2 ? ?, C-astleton, R. S., ix./13 {J.), G. 313.5 ; near the 

 R. Dove, ourselves, ix./16 ; 1 ? with forty-seven pairs of 

 legs, Manners Wood, near Bakewell, W. B. & S. G. B.-B., 

 6/vi./18 ; Bak.-well district, ourselves, 1918. 



27. 0, inscnlptus, Attems, 1895. 



Syn. The name " G. pro.ritmis'" has been used by other authors in 

 this country and ourselves to record animals which un- 

 doubtedly belong to G. insculptus. The true G. proximu^, 

 C. L. Koch, 1847, is unknown to us. 



25 mm. 



In ]\Iay and June we found G. insculptus to i)e a fjiirjy 

 common sijecies, and we obtained a good number of specimens. 

 Tlie socket of the anterior ventral plates is larjre. 



P)Uxton and Bakewell districts, ourselve."^, 1918 ; Burbac,e 

 Hall, S. G. B.-B., 27/V./18. 



28. G. electricus (Linne, 1758). 

 45 mm. 



This is an interesting species, not very common in the 



