DUBLIN NATURAL HISTORY SOCIETY. 45 



covory of, and addition to, the British Crustacea of Thia polita. This 

 remarkable and beautiful little crab was found near Roundstone, Conne- 

 mara, by Mr. M'Calla, where it burrows in sand ; only one species of the 

 genus is described as European, and this discovery is an important ad- 

 dition to the Crustacea of Britain. A very fine female specimen was 

 exhibited from the Museum of the Society ; a smaller one, a male, is in 

 the collection of the Dublin Society." — Saunders^ Newsletter, January 9, 

 1846. Vide also Eighth Report of Dublin Natural History Society, 

 page 8. 



M'Calla himself also brought the discovery before one of the Evening 

 Meetings of the Royal Dublin Society, held 28th of February, 1846. 

 ( Vide Proceedings, Royal Dublin Society, vol. Ixxxiii., Appendix xv., 

 p. cxiii. ; and vol. Ixxxii., Appendix v., p. xlv.) This last paper purports 

 to have been read on the 10th of January, 1846, but must have been 

 corrected subsequent to this date. Professor Scouler, furthermore, pre- 

 sented specimens to the British Museum, as appears by reference to their 

 Catalogue published in 1847. 



By some mischance or other, however, it escaped the notice of English 

 naturalists, and when in 1850 Professor Melville, ignorant of its previous 

 occurrence on our shores, met with the species in Galway, he, having 

 first identified it from the description given by Milne Edwards, for- 

 warded specimens to Professor Bell, by whom it was published as an 

 addition to the British Fauna in the Supplement to his British Stalk- 

 eyed Crustacea. Professor Melville himself was one of the first to point 

 out the apparent injustice done to M'Calla. 



The species, from my experience of it in confinement, is sluggish, 

 but a determined animal feeder, destroying even large bivalves. Actiniae 

 and Palaemons, some 2 inches long; it is also apparently a night-feeder. 

 Galway Bay, Roundstone (W. M'C.) 



Munida HondeletH.—BoMast ( W. T. ), Youghal (R. B. ), Cove (J. V. T.), 

 Galway (A. G. M.), Roundstone<?) (C. F.) 



Crangon spinosus. — Cove (J. V. T.), Galway (A. G. M.) 



Nika edult's.— Cove (J. V. T.), Roundstone (A. G. M.) 



Athanas mtescens, — Lahinch (W, T.), Ballyvaughan (A. G. M.), 

 Roundstone (W. M'C.) 



Supplemental Dublin Species, pp. 80-87. 



Pirimela denticulata. — Dalkey Sound, dredged a single female spe- 

 cimen. May, 1857, loaded with ova. After it had been kept in a tMik 

 for three weeks, the ova changed their colour from a bright salmon-red 

 to a dirty brown : this change examination with the microscope showed 

 to be dependent on the development of the zoes in the ova, their black 

 eyes showing plainly through the integuments. I was unable at the 

 time to examine them further ; and the following day, to my great re- 

 gret, I foimd that the ova were all shed, and the tank filled wiUi zoes. 



These were extremely active, tumbling about in all directions, swim- 

 ming by alternately rolling up and imclosing their jointed bodies, and 

 throwing complete summersaults; when they rested, it was on their 



