tmth descriptions of some new species of Invertebrata. 319 



Two examples of this species were dredged from a depth of about 

 C fathoms in Strangford lough near Portaferry in August 1837 by 

 Mr. Hyndman and myself; and two more were in like manner pro- 

 cured by us in July 1840 when with Mr. Edward Forbes and Mr. R. 

 Ball dredging in Killery bay on the western coast — depth from 3 to 

 12 fathoms. 



Crustacea*. 



Polybius Henslowii, Leach, ^lalac. pi. 9. Desmarest, Consid. 

 Crust, p. 100. pi. 7. fig. 1. (copied from Leach). Edwards, Hist . 

 Crust, vol. i. p. 139. 



A crab of this species was obtained at Crook Haven, county Cork, 

 in August last by Professor Allman, who kindly sent it to me. It 

 was remarked at the same time by its captor that the species ajjpears 

 to be " eminently natatory," and that " the one taken was swimming 

 with great ease near the surface of the water among shoals of Aca- 

 lephcE." It would appear, from the general work of Milne Edwards 

 on the Crustacea, that this is the only species of its genus known. 

 It was described by Leach from specimens taken on the coast of 

 Devonshire, and is given by M. Edwards as one of the species of 

 La Manche, these being the only localities noticed for it in the two 

 works. 



Nymphon Johnstoni, Goodsir, Edin. Phil. Journ. January 1842, 

 p. 13G. pi. 3. tig. 4. 



The first specimen of this NympJion which I have seen was taken 

 by Dr. J. L. Drummond at Macedon point, Belfast bay, upwards of 

 twenty years ago. From 1834 to the present time I have occasionally 

 procured it on the north-east coast. From the " German Ocean" 

 Mr. Goodsir's specimens were derived. 



Nymphon spinosum, Goodsir, Edin. P. J. January 1842, p. 136. 

 pi. 3. fig. 3. 



Examples of this species have been taken in Belfast bay, &c. No 

 locality is mentioned by Mr. Goodsir, but his specimens are probably 

 from the Firth of Forth. 



Pasithoe vesiculosa, Goodsir, Edin. P. J. Oct. 1842, p. 365. pi. 6. 

 fig. 17. 



My specimen of this rare form was dredged at Dalkey island, bay 

 of Dublin, in August 1840 : R. Ball, E. Forbes, W. T. : Mr. Goodsir's 

 was procured in the Firth of Forth. 



* Irenceus splendidus, Goodsir, Edin. Phil. Journ. Oct. 1843, p. 039. 

 pi. 6. fig. 1—9. 



Although this species is unknown to me as Irish, it seems desirable, from 

 its being as yet recorded only as inhabiting a part of the eastern coast of 

 Scotland, to mention, that it frequents the western coast of that country 

 likewise, several specimens having been captured by Mr. Hyndman in a 

 towing-net at the Kyles of Bute in the month of June last. Their green 

 colour especially attracted attention. 



