840 Insects. 



which in the ovum had been bent underneath ; so that it escapes 

 backwards. In some it appeared as if the caudal extremity protruded 

 first ; but in most it was the bent portion, and the legs were in gene- 

 ral bent up under the thorax. They seemed, however, to find great 

 difficulty in throwing off the loose membrane of the ovum from the 

 thoracic portion or carapace, and almost all failed in doing this 

 effectually, the development, perhaps, going on too rapidly, in conse- 

 quence of exposure to a warm sun. I suppose, that in the natural 

 state, this is effected in the sand, by creeping backwards, and thereby 

 rubbing it off. The eyes of these young crabs, at their first escape 

 from the ovum, are large and sessile. In one or two instances, I 

 thought I saw antennae and branchiae, or at least their projecting 

 extremities ; but I could not decidedly distinguish between them and 

 the legs. The thoracic portion, or carapace, is somewhat rounded, 

 or at least, ovoid. I could see no chela?, and suppose them not deve- 

 loped. The common legs seem bifurcate at the second joint from the 

 extremity, and ending in a fine point ; or, perhaps, the bifurcation is 

 at the root. The abdominal and caudal portion is long and narrow, 

 and also projecting, much resembling the corresponding portion of 

 the Nebalia Herbstii. A considerable change or metamorphosis 

 must take place in these creatures, before they assume their final form, 

 thus confirming the views of Mr. J. V. Thompson on this subject; 

 though these little crabs differ much from the figures of the common 

 edible crab [Cancer Pagurus), as given by that gentleman.' " — p. 78. 



Notes on the Genus Peronea. By Thomas Desvignes, Esq. 



Having captured upwards of 1,900 specimens of the genus Peronea 

 [Curtis], during the three past autumns, in Whittlebury Forest, I 

 herewith send you a list of them, with a few remarks on those gene- 

 rally called " raised buttons." 





Peronea. (Spwia), 



D. 





Aspcrana 



Logiana 





Coronana 



vi n (iir<i n n 



favillaceana 







V til 1 • _ . 1 ll.l 





Boscana 



tristana 





autumnana 



cirrana 



reticulana 





ramostriana 



rufana 



latifasciana 





albistriana 



Schalleriana 



plumbosana 





umbrana 



