Mr. G. R. Waterhouse on two new genera of 



If the canary-coloured specimens be but varieties of the black ones, 

 then is the name of nigricans improper, nor can the very great dif- 

 ference in colour between the varieties be explained by reference to 

 age or locality. 



Goniodoris barvicensis, at Sea Point in great numbers just below low- 

 water mark. 



Tritonia Hombergii, in deep water ; a single specimen. 

 Eolidia rufibranchialis, not uncommon. 



Bulla haliotidoides, a single living specimen at Williamstown. 

 Lottia testudinalis, abundant on stones above low-water mark at 

 Williamstown. 



Crustacea. 



Corystes Cassivelaunus, common. 



Atelecyclus Heterodon, Portmarnock Strand, after storms. 



Portumnus variegatus, not uncommon. 



Carcinus Mamas, common. 



Portunus puber, common. 



Cancer Pagurus, common. 



Pilumnus hirtellus, not common. 



Pinnotheres Pisum, not common. 



Hyas Araneus, not common. 



H. coarclatus, common. 



Inachus Dorynchus, Portmarnock, not common. 



Macropodia Phalangium, common. 



Pagurus Streblonyx, common. 



Galathea squamifera. 



Porcellana longicornis. 



P. platycheles. 



For the names of some of the species in the above list I am in- 

 debted to Mr. Thompson of Belfast, whose kindness in this parti- 

 cular I had to acknowlege on a former occasion. 



XIX. — Carabideous Insects collected by Charles Darwin, Esq., 

 during the Voyage of Her Majesty's Ship Beagle. By G. 

 R. Waterhouse, Esq., Curator to the Zoological Society 

 of London. 



[Continued from vol. vii. p. 129. With a Plate.] 



Section Carabides. 

 Genus ABROPUS*, nov. gen. 



Caput elongatum, antice et postice acuminatum. Labrum subqua- 

 dratum. Mandibula edentulse, acutse. Mentum profunde emar- 

 ginatum, angulis anticis acutis. Palpi, articulo ultimo elongato, 

 subcylindraceo, in medium paulo incrassato, ad apicem truncato. 

 Antenna perlongse. 



Thorax capite vix latior, fere quadratus. 



* From «/3^o? and 5ro3c, having soft or tender feet ; the joints of the tarsi 

 in both sexes being many of them furnished with soft brushes of hair and 

 membranous appendages on the under side. 



