Mr. W. Thompson's Additions to the Fauna of Ireland, 65 
Praniza carulata, Mont, (sp.) ? 
A letter from A. H. Hallday, 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 Anceiis 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 with 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 hippolyteSy 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 Galw'ay 
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 w'as in profusion adhering to the under sides of the leaves of the 
water-lily {Nymphcea alha). 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 Pinna 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 w^ater, 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. Vol, i. 
5 
