240 Mr. W. Thompson's Additions to the Fauna of Ireland. 



six lines in length, and agree in all respects with Goodsir's descrip- 

 tion, but present at the same time a striking character which he has 

 not noticed — in the carapace being almost wholly covered by series of 

 minute granular spines (if such an expression may be used) with the 

 points directed forward, and hence my " ? " as to species. The 

 describer of Alauna obtained but the one specimen. 



Order Stomapoda. 



4. Cynthia ? Thomp. (J. V.), Zool. Res., Memoir 3, p. 55 ; 



Edw. vol. ii. p. 462. 

 Among some of the more minute Crustacea taken at Strangford 

 lough in May 1840 by Mr. R. Patterson is a Cynthia, but hardly 

 sufficiently perfect to be determined. The species on which the 

 genus was founded was taken between Madeira and Barbadoes. 

 Mr. H. Goodsir added the genus to the British fauna from examples 

 obtained on the east coast of Scotland. 



5. Themisto* brevispinosa, Goodsir, Edin. New Phil. Journ. 



vol. xxxiii. p. 177. pi. 2. f. 9. 

 In September 1 835 I obtained an individual of this species in rock- 

 pools between tide-marks at Bangor, co. Down. 



Note. 

 Mysis chamaleon, Thomp. (J. V.), Zool. Res., Memoir 2, pi. 2. 



f. 1—10. 



The first examples described under this name were obtained in the 

 harbour of Cork. Specimens from each side of the island have come 

 under my notice. At Bangor, within the entrance of Belfast bay ; 

 Ballywalter, on the open coast of Down (both strictly marine loca- 

 lities) ; in Dundrum bay, same county (in brackish water) ; and in the 

 tidal river Lagan at Belfast ; I found them common in the summer 

 or autumn of 1835 and 1836. In the three first-named places 

 they were taken between tide-marks ; in rock-pools in the two first, 

 and in a sandy bay in the last. I have seen it among Crustacea 

 brought up in the dredge in water five fathoms deep off the Dublin 

 coast by Mr. R. Ball ; have received it from the west coast of Cork 

 (Professor G. J. Allman), and have taken it myself along the shores 

 of Connaught. A detailed note of June 22, 1846, is as follows. 

 When in company with Mr. Hyndman today at Strangford lough, I 

 took a number of this species (which is admirably figured in the work 

 quoted) in brackish water at Ardmillan. They were in extraordinary 

 profusion, and viewed in the water were at first sight mistaken for 

 the fry of fishf. They appeared to be all about the same size, and 



• This was used as a generic name by Guerin previous to its publication 

 as such by Goodsir. Guerin's genus belongs to the order Amphipoda and 

 family Hyperiadce. Macromysis is substituted by Mr. Adam White for 

 Goodsir's Themisto in the Catalogue of the Crustacea in the British Mu- 

 seum, p. 81. 



f I have generally remarked the Mysis to be much more numerous where 

 fresh- water enters the sea than in pure sea-water. 



