234 Proceedings of the Royal Irish Academy. 



The only species peculiar to the Irish shallo'vr-Trater Fatma are two 

 doubtful species of Cucumaria, viz. : C. andrewsi and C. saxicola ; 

 the former species was named by Farran in 1852, from specimens taken 

 at Clonea, Co. Vaterford, and the latter by Brady and Eobertson in 

 1871, from specimens taken in Birterbuy Bay and ^Vestport Bay. 



Five deep-water species of Echinoderma, viz. : Holothuria aspera, 

 Astropecten sphenopJax, Pentagonaster greeni, Hymenaster giganteus and 

 Cidaris gracilis have, however, hitherto only been obtained off the 

 western coasts of Ireland ; the last two species having been described 

 by Sladen from specimens dredged in 750 fms. in the expedition 

 organized by a committee of the Eoyal Irish Academy in 1888. 

 Pteraster personatus, Pentagonaster halteatus and P. coneiivaus were 

 also described by Sladen from specimens obtaiued at a depth of 

 750 fms. in this expedition ; P. halteatus and P. coyicinniu are 

 however regarded by Bell as identical with P. granularis Eetz., but 

 by Ludwig as possibly identical with P. hystrici% iSIarenzeller, and 

 Pteraster personattis has since been recorded from the Bay of Biscay. 



Strongylocentrotus lividm, the purple sea-urchin, is a very character- 

 istic species of the western coasts of Ireland, fi-om Malin Head to the 

 south coast of Co. Cork ; a specimen is stated by Dr. Dickie to have 

 been cast up on the shore at Carrickfergus, but this is the only record 

 for the east of Ireland. It is a southern species ranging fi'om north of 

 Ireland and south-west of England, southwards to the Azores and 

 Canaries. Holothuria for skaTdi {JB.. nigra, auct.), the nigger or cotton- 

 spinner, is another southern species that is generally distributed on the 

 western coasts of Ireland, and there is no record of its occuixence on 

 the eastern coasts. 



The two species of Luidia, viz. : Z. ciliaris and L. sarsi, are generally 

 distributed and common off the western coasts of Ireland, and range 

 from Faroe and Xorway respectively to Cape Terde but do not appear 

 to have been recorded from the east coast of Ireland. 



BiBLIOGEAPUT. 



Agassiz, a. : 



'72-' 74. Eevision of the Echini. lUust. Cat. Mus. Comp. Zool., 



Harvard, Xo. vii. 

 '81. "Challenger" Eeport. Zoology. Tol. iii. Pari IX. 



Echinoidea. 

 Alcock, T. : 



'65. !S'otes on Natural History Specimens lately received from 



Connemara. Proc. Lit. and Phil. Soc, Manchester, iv., 



pp. 192-208. 



