Mr. W. Thompson's Additions to the Fauna of Ireland. 65 



Praniza ccerulattty Mont, (sp.) ? 



A letter from A. H. Haliday, Esq., dated October 9, 1847, con- 

 veyed the following information : — " I found a species of Praniza 

 pretty common on the clayey shores of Strangford lough last week, 

 in company with Anceus maxillaris. They were in small cavities on 

 the surface of the clay under stones, sometimes singly, oftener two, 

 or even three and four in each hole ; the smaller slender green ones 

 were few in comparison. You will find some of the new-born young 

 with them, having all the characteristic form of the parent, but the 

 posterior thoracic segments not so completely confounded together. 

 I have given but a hasty look at them, but have not recognized ^ 

 among the adults." 



Along w^ith the Crustacea since received from Mr. Ball were sent 

 specimens of a Praniza, purchased of Mr. McCalla as collected on 

 the Irish coast, but no locality is given. They were obtained pre- 

 vious to those first noticed. 



Bopyrus hippolytes, Kroyer, Gronl. Amfip. p. 78. pi. 4. f. 22. 



Two females of this species were found within the carapace of the 

 Hippolyte varians, Leach, which 1 obtained on the coast of Galway 

 in July 1840. M. Kroyer found it on the Hippolyte polaris. 



Sida crystallina, Miill. (sp.) Edw. Crust, iii. 385. 



Daphnia crystallina, Miill. Entomost. 

 Professor Allman lately sent me sketches of a Daphnia obtained by 

 him during autumn in a little subalpine lake near Killarney, where 

 it was in profusion adhering to the under sides of the leaves of the 

 water-lily {Nymphcea alba). On the sketches being transmitted to 

 Dr. Baird of the British Museum, he at once recognized in them the 

 D. crystallina, Miill. {Sida, Straus), adding that he had met with 

 the species but in two localities — near London — and in both spa- 

 ringly. 



ZOOPHYTA. 



Hippothoa sica, Couch, Cornish Fauna, part 3. p. 102. pi. 19. f. 8; 



Johnst, Brit. Zooph. p. 292, 2nd edit., 

 I find within a very large dead Piima dredged at the entrance of 

 Belfast bay. Mr. Couch's description, but not his figure, is applica- 

 ble to my specimen. The striking characters may be noticed. The 

 length of the cells is as described, " about four times their transverse 

 diameter," and the apertures " are long and tubular, frequently as 

 long as the cell." But whether this remarkable form may not be 

 due to the security and freedom from injury enjoyed by the zoophyte 

 within the closed valves of the Pinna, I shall not, from the exami- 

 nation of a single specimen, pretend to determine. Mr. Couch's 

 specimens were however procured " on stones, from deep water, com- 

 mon." But for this character (which probably may not be perma- 

 nent) I should not enumerate my Hippothoa as distinct from H. di- 

 varicata, which too is described by Dr. Johnston as sometimes having 

 the apertures " shortly tubular." 



Ann, ^ May, N, Hist, Ser.2. Voli, 5 



