302 On the Genera of the Dromiicla3. 



•wliicli are sliarp. Carapace 



more or less granular .... Pt^toZo »icrrt,Stimps., 1859. 

 2. Xo epipodites on the chelipeds. 

 a. Legs knobbed or ridged. Cara- 

 par-e broader than long. 



(1) Regions more or less clearly 

 marked. Sternal grooves 

 end apart. ISIo thorn ou 

 hinder edge of last joint of 

 iifth leg Cryptoilromia, Stimps., 



(2) Regions almost lost. Ster- 1859 {-\-Epidromia, 

 ual grooves end tngethor. Kossni.). 

 A thorn ou the hinder edge 

 of the last ioiut of the tifth 

 leg 



yS. Legs not knobbed or ridged. 

 Carapace narrow, often longer 

 than broad. [Furrows be- 

 tween the regions almost 

 absolutely lost.] 



(1 ) Sternal grooves end together. 

 («) Frontdeeply cleftinto two 



prominent rounded lobes, 

 (i) Front not as in Eudrondn. Dromidia, Stimps., 1859. 



(2) Sternal grooves end apart . . Dioinidts, g. n. 



The probable genealogical relations between the genera 

 may be represented by the following tree : — 



Drom idia * \. Lasiodrom ia * . Crj/2)todro»uoj)sis * f. Cryptudromia * 



C'ryptodrontiopsis, g. n. 



Eadromia, Heud., 18?8. 



Eudrom ia * f. — ^ Dromides * 



Petdomcra. 



E>romia. 



Dromidio2isis\ 



Conchacetes. 



Spluerodromia. 



Ilypocoiichd *. 



