228 PBOCEEDINGS OF SOCIETIES. 



to a point, so that its height nearly equals its transverse diameter. 

 The arrangement of the pores and tubercles of the ambulacral plates are 

 identical with that in specimens of E. lividus from Valentia Island, but 

 the ovarian plates and nucleus differ from those of Echinus lividus, and 

 are, on the other hand, identical with the form of these parts in Echinus 

 sphwra ; in fact, in many of its characters this specimen is intermediate 

 between these two species. 



The specimen sent up unfortunately wants the spines, so that it is 

 doubtful whether it may not be a species distinct from either E. lividus 

 or 22 sphcera. An Echinus lividus, pentangular in form, is recorded in 

 Forbes' s "British Starfishes," page 168, but no details are given, and 

 the pentangular E. sphwra is well known. 



Professor Kinahan also exhibited a very fine living specimen of the 

 spiny crossfish, Uraster glacialis (Link.), from Dalkey Sound, which had 

 been sent to him by D. J. Corrigan, M. D., M. E. I. A. This specimen 

 was remarkable for its colour, the species is common in Dublin Bay, in 

 from 10-30 fathoms ; its occurrence there was first recorded from a spe- 

 cimen presented to this Society by Dr. Corrigan in 1853. There is a 

 very remarkable variety (?) of Uraster rubens, which occurs abundantly 

 when dredging on the Kish Bank, which may be mistaken for this spe- 

 cies, and which suggests the question whether two species have not been 

 confounded under the name of Uraster glacialis in our lists. The cha- 

 racters of the papillae around the spines at once marks out the true 

 U. glacialis; in the variety spoken of the spines" are perfectly naked, 

 whilst in U. glacialis they are surrounded by a fleshy mass, crowded at 

 its summit with numerous small spinules. 



The Chairman, under the new rules, declared the following duly 

 elected : — 



Joseph Eees Greene, Associate Member. 



William Kennedy, Limerick, Corresponding Member. 



W. Lecky, Yalentia, Corresponding Member. 



The Session was then declared closed, and the Society adjourned till 

 November. 



ADDENDUM TO SUPPLEMENTAL DUBLIN LIST OF CKUSTACEA (SEE MEETING, 

 APRIL 17, 1857). BY JOHN B. KINAHAN, M. B. 



The Galathea referred to in the above list as G. nexa proves to be an un- 

 named species ; it is therefore figured, and a further description of the 

 species is appended ; also a description of the new Iphimedia figured in 

 the same plate, from a drawing furnished me by C. Spence Bate, Esq., 

 P. L. S., who has kindly described the species, though too late for in- 

 sertion in its"proper place. 



Galathea A^dbewslt (mihi). Plate XVI., Fig. 8, a, b, c, d. 

 G. rostro brevi, 3-5 dentibus utrinque ornatis. Pedibus anticis 

 rotundatis elongatis, angustis sparse tuberculatis, tuberculis spinos 



