Crustacea. 



5773 



valve. This form is constant, and 

 occurs in most gatherings from deep 

 water that I have examined 



F Pleurosigma prolongatum 



R Pleurosigma, small species, with very 

 acute extremities 



R Pleurosigma transversalis 



R Pleurosigma fasciola 



A Coscinodiscus conciunus. Fine and 

 large. 



F Coscinodiscus perforatus 



A Coscinodiscus excentricus. Fine 



F Coscinodiscus radiatus 



A Eupodiscus crassus. Fine 



F Eupodiscus Ralfsii 



R Eupodiscus sculptus 



R Eupodiscus Argus. In fragments 



R Eupodiscus ? nov. sp., with cellular 

 markings like a Coscinodiscus, and a 

 single process near the margin 



R Amphiprora didyma ? 



R Surirella fastuosa 



F Biddulphia turgida. Not entire 



A Biddulphia Bailevii. Fine 



F Biddulphia rhombus 



A Biddulphia aurita. In filaments 



A Himantidium ? sp. 



A Rhizosolenia styliformis, nov. sp. 



F Rhizosolenia, small species, with ends 

 produced into a long, slender fila- 

 ment 



F Rhizosolenia, a curious and beautiful 



species, apparently new, with feather- 

 or scale-like markings 



F Doryphora amphiceros 



F Doryphora ? sp. with parallel raonilli- 

 form striae 



F Chaetoceros Wighamii 



F Chaetoceros, apparently two more spe- 

 cies 



A Actinocyclus undulatus. Fine 



F Actinocyclus ? sp. without rays 



R Nitzschia closterium? 



R Nitzschia lanceolatum ? 



F Oithosira marina 



R Oithosira ? sp. 



A Asterionella ? two sp. 



R Podosira maculata 



A Melosira? sp. 



F Stephanopyxis sp. Beautiful species, 

 with cellular structure, and furnished 

 with clubbed or forked horns at the 

 ends of the frustules. Occurs in fila- 

 ments of four to five frustules 



F Stauroneis pulchella 



R Trieeratium favus. Fragments 



R Trieeratium striolatum 



R Trieeratium? curious form, with a star- 

 like marking in the centre of the 

 valve 



F Melosira? small form, with longitudi- 

 nal markings 



R Navicula Lyra 



R Navicula Hennedyii 



■George Norman ; Hull, July 28, 1857. 



List of Podophthalmous Crustacea found in Dublin Bay. 

 By John R. Kinahan, M.B., M.R.I.A., &c. 



(Continued from p. 5717). 



Common Hermit Crab (Bemhardus streblonyx, Leach sp.) Com- 

 mon in extreme littoral laminarian and coralline zones. It occurs in 

 immense numbers, and of very large size, in the whelk pots, especially 

 when set on a sandy bottom, as outside the Mugglins ; also on the 



