S8 Scientific Proceedings, Uoyal Dublin Society. 



specimens from counties Galway and Mayo, collected from L.W.M. to a 

 depth of 11 fms. The anchors varied in size from 176/(, with plate of 154/i, 

 to 297^, with plate of 210/^. Two anchors, measuring from 308 to 330/^, 

 were also observed ; but ca. 70 per cent, of the anchors would seem to be 

 under 254^. The width across flukes is very variable. In 2 anchors, 

 measuring 176^ in length, the width of the flukes varied from 93| to 110/z. 

 An anchor of 165^ had flukes of 99/x in width, while those of an anchor of 

 176^ only measured 93-|,u in width. Specimens from Blacksod Bay, collected 

 in the months of March and November, showed many plates with only 

 7 holes, and others, measuring from 165 to 201^, possessed as many as 19 

 holes. The extra holes were small ones at the fixed end of plate, such as 

 figured by Bell (1892 A, PI. 1, fig. 1), where plates are shown with 7-10 small 

 holes in addition to the 7 large ones. 



As regards the development of the gonad, a specimen measuring 25 mm. 

 in length, less tentacles, showed 2 bunches of simple (sometimes forked) 

 gonadial tubes of 2-14 mm. in length. There were 5 tubes in one bunch, 

 and 3 in the other. 



Distribution. — Great Britain; Norway to Italy; Bermuda; Main to 

 S. Carolina; Pacific coast, various stations from Washington to California 

 (Clark, 1907). 



LIST OF EEFEEENCES. 



Beaumont, W. L, 1900. — "The Fauna and Flora of Valentia Harbour, on 

 the West Coast of Ireland." Pt. 2, vii. Eept. on Results of Dredging 

 and Shore-Collecting.— Proc. E. I. Acad. (3), v., pp. 754-793. 



Bell, F. J.,1889. — " Echinodermata in Eeport of a Deep-sea Trawling Cruise 

 off the S.-W. Coast of Ireland, under the direction of Eev. W. Spots- 

 wood Green." — Ann. and Mag. Nat. Hist. (6), 4, pp. 432-445, 

 pis. 18-19. 



Bell, F. J., 1892. — " On the Echinoderms collected by the s.s. Fingal in 

 1890, and by the s.s. Harleqioin in 1891, off the west coast of Ireland." — 

 Sc. Proc. Eoy. Dublin Soc. (N.S.), vii, pp. 520-529, pis. 23-25. 



Bell, F. J., 1892, a — "Catalogue of the British Echinoderms in the British 

 Museum (Natural History), London. 



Bkady, G. S., and Eobektson, D., 1871. — " Descriptions of two new Species 

 of British Holothurioidea."— Proc. Zool. Soc, 1871-2. 



