46 Scientific Proceedings, Royal Duhlin Society. 



occurrence at Eoundstone, Co. Galway (Thompson, 1856), off Dursey Head, 

 Co. Cork (Sladen, 1891), and off the west of Ireland {Argo Cruise). A 

 specimen in the Irish National Museum, measuring 20 mm. in length, was 

 taken on the west coast of Ireland by the Eoyal Dublin Society in 1896, at 

 soundings of 500 fms. The type specimen was dredged in Belfast Bay, and 

 its presence in the Irish Sea has since been noted by Kinahan (1861) in Dublin 

 Bay, and by Bell (1892) at Liverpooh A specimen of 37 mm. in length, 

 captured in August, contained ca. 55 gonadial tubes, a few of which were 

 bifurcated near the extremity. The tubes average 20 mm. in length, and 

 •50 mm. in diameter. They are about twice as wide as those of C. elongata 

 and C. Normani, as far as examined, from specimens in our hauls. 



Distribution. — West coast of Scandinavia south of the Arctic Circle to 

 Mediterranean (Theel, 1885). West of Scotland, 420-630 fms. {Porcupine 

 Exp.). 



Cucumaria Andrewsi (Farran), 1852, 



Clonea, Dungarvan, two specimens. 



These specimens do not appear to be extant, and it seems best to let the 

 name drop altogether, as the description is too incomplete. " Nothing can 

 be said about this species except that it is certainly a Cucumaria ; a leading 

 ground for regarding it as new was the canary colour of the tentacles." 

 (Bell, 1892a, p. 41.) 



Cucumaria lactea (Forbes & Goodsir), 1839. 



Holothuria Irunnea, Thompson, 1840. 

 Ocnus lacteiis, Forbes, 1841. 



„ hrunneus, Forbes, 1841. 

 Cucumaria lactea, Diib. & Kor. 



„ hrunnea, H«5rouard, 1889. 



From the evidence of many of our hauls, and from records of former 

 observers (Nichols, 1903), it is apparent that this species is distributed on both 

 the east and west coasts of Ireland, where we have taken it from between 

 tide-marks to a depth of 52 fms. The latter soundings were made 10 miles 

 east of Baily Light, Co. Dublin. Our east coast specimens, and an example 

 from Dalkey, collected by the late Mr. Colgan, and presented to the Irish 

 National Museum, belong to the brown form, but both white and brown 

 examples occurred in the west coast hauls. 



The spicula of the perisome are very much alike in this species and 

 C. Normani. Orton (1914, p. 228) has shown that the present species belongs 

 to the group having only a few tubes in the gonad ; but if the specimen is 



