522 Scientific Proceedings, Royal Dublin Society. 



Thyone raphanus, Diib. and Kor. 



Dingle Bay, Co. Kerry, 7 fms. (St. 103). 



Uolothurta nigra, Auct. 



W. of St. John's Point, Donegal Bay, 30 fms. (St. 212) ; 



Killybegs Harbour, Co. Donegal, 14-26 fms. (St. 207) ; Dava- 



lauu Sound, Co. Galway, 13-16 fms. (St. 196) ; Dingle Bay, Co. 



Kerry, 4 fms. (St. 103) ; Casheen Bay, Connemara, 7 fms. (St. 



137)." 



Ilolotburia iiitestinalis, A. and B. 



Probably from 40 miles off AcbiU Head, 220 fms. (St. 63). 



If olothuria tremula, Grunn. 



From the same locality as H. intestinalis (St. 63) ; 45 miles 

 off Black Eock, Co. Mayo, 500 fms. (St. 201). 



11. — CRINOIDEA. 

 Antedon bifida, Penn. [A. rosacea, Auct.). 

 Cleggan Bay, Co. Galway, 8-11 fms. (St. 75). 



III. — ASTEROIDEA. 



Astropecten irregularis, Penn. 



500 fms. ; 115 fms., 40 miles off Bolus Head, Co. Kerry 

 (St. 125) ; Galway Bay, 15 fms. 



Astropecten ^pbenoplax (PI. xxii.). 



I am unable to find that a starfish from 500 fms. 45 miles off 

 Blacksod Bay, Co. Mayo (St. 201) has as yet been described. It 

 is noticeable from the fact that the infero-marginal plates are 

 sharply cut off into a wedge-shape on their outer side. The extent 

 of the gap made by this cut varies somewhat, but the gap is 

 always to be seen. What is much more remarkable is the great 

 variation in the extent to which spines are developed on the 

 supero-marginals. The commonly accepted view is, of course, that 

 the presence or absence of spines on these plates is not only a good 

 specific character, but one by which species may be arranged in 

 groups. When, therefore, I had in my hands a specimen in which 

 no spines were developed on the supero-marginals, and another in 



