12 DREDGING REPORTS. 



Report on the Crustacea, by the Eev. Alfred Merle Norman, M. A. 



The Crustacea taken during the Association dredging of the 

 summer of 1864 numher 157 species, including the Pycnogo- 

 noidea reported on by Mr. Hodge. Among them are two Am- 

 phipods and several Ostracoda which are new to science, and 

 will be presently described. The following also deserve especial 

 notice as either new to our local Fauna, or interesting on other 

 accounts. 



Pagurus ferrugineus, Norman. (Ann. Nat. Hist. Oct. 1861. 

 PL XIII, figs. 1-3.) Two examples of this recently distinguished 

 species were procured three miles off Dunstanborough, associated 

 on the same ground with Pagurus Bemhardus, P. puiescens, 

 P. Icevis, and P. Hyndmanni. This species has now been dredged 

 by me in the four most extreme parts of the British coast, namely, 

 at Shetland, Guernsey, in the Firth of Clyde, and off the North- 

 umberland coast. Pagurus ferrugineus would therefore seem to 

 be distributed all around our shores, but has probably hitherto 

 generally escaped attention on account of its small size, and the 

 mistaken assumption that it was the young of some other species. 



Crangon fasciatus, Risso. A single specimen of this shrimp, 

 which had not been previously met with on any part of the 

 eastern coast, was dredged in shallow water within the Fern 

 Islands. 



Some rare Amphipoda were for the first time taken in our 

 district, namely, Anonyx BTolbolln, Kroyer ; Ifonoculodes carina- 

 tus, Bate; Westwoodilla ccecula, Bate; and Protomedeia Whitei, 

 Bate ; and two species were also found which belong to genera 

 previously unknown in Great Britain, and one of which is new 

 to science. It may be thus characterized — 



Fam. GAMMARFM], Norman. (Subfam. Gammarides B. & W.) 



Genus. CHEIROCRATUS,* n. gen. 



Superior antennas shorter than inferior, having a secondary 

 appendage. First gnathopocls not subchelate. Second gnathopods 



* X u p and xpxTia ; strong in the hand. The new Amphipoda will also he described 

 in the Brit. Assoc. Report for 1864. 



