PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 211 



which the pentacrinoids may be sought, he sa^-s, would serve further to point out the 

 purpose for which this migration takes place. 



Feather stars seem to be especially common in Lamlash Bay, occurring there in 

 great nimibers (Parkes, 1891). 



Henderson (1887) says that this species is common on hard ground in 18 to 37 

 meters throughout the Clj'de district, being especially common off the southern end of 

 the island of Bute (Galium 's Hole and Hank's Neb), off the western side of Little 

 Cumbrae, and off Roseneath Point. Prof. W. E. Hoyle records it (1889) from 55 to 73 

 meters in the Dunoon Basin, which occupies the channel of the Clyde from the extremity 

 of Great Gumbrae northward and extends up into the lower stretch of Loch Long. 

 Mr. Thomas Scott (1897) says that it is common near the eastern shore of Loch Fjaie. 



Summarizing the data accumulated by Sir John Murray and his colleagues during 

 the years from 1884 to 1892, Mr. James Ghumley (1918) says that the feather star is 

 very rare at the mouth of Loch Strivan; in the Dunoon Basin it is very common on the 

 eastern side in 9 to 36 meters, moderately common at the southern end in 51 to 73 

 meters, but rare in the center in 18 to 36 meters; in the Arran basin it occurs at the 

 Cumbraes from shore to 36 meters, and at Lamlash, and is rare at Tan Buoj^ in 13 

 meters; on the Plateau it was found in the Sanda-Ailsa region in 44 meters, and it is 

 very rare in Gampbelltown Loch in 18 to 29 meters. It has not yet been recorded from 

 upper Loch Fyne, Loch Goil, or the Gareloch. One from the mouth of Loch Strivan had 

 a diameter of about 400 mm. 



Mr. Richard Elmhirst, when Superintendent of the Millport station, sent me de- 

 tailed information regarding the distribution of this animal as known to him. He 

 wTites that it occurs in the seaward part of the Firth (Barrier), around Arran, Bute and 

 the Gumbraes, and there is one record each for the East Kyles and Loch Strivan. But 

 it does not seem to reach far into the landward lochs; there are no records for Lochs 

 Fyne, Long, etc. It is very variable in color, and also variable in size, as in any catch 

 specimens belonging to two year groups may be present. 



About the Isle of Man it is not rare (Forbes, 1831, 1839). It is found in deep 

 water off the cliffs (Herdman, 1906) and is abundant about the southern end of the 

 island (Ghadwick, 1907) and m 18 to 37 meters off Port Erin (Herdman, 1886). 



Summarizing all the available information regarding its local distribution, Sir 

 William Herdman wrote in 1886 that it occurs in deep water aromid the shores of the 

 Isle of Man, and has been dredged by Mr. R. Garner off Douglas Bay, and near Port 

 Erin and The Galf. It is also recorded by Forbes as having been taken off the Isle of 

 Man in 46 meters. At least in 1885 it occm-red in abundance in depths of from 18 to 37 

 meters off Port Erin, Port St. Marj', and Spanish Head, at the southern end of the Isle of 

 Man. The specimens were of fair size, and showed the usual vai'iations in color, yellow, 

 tawny, orange and crimson individuals being obtained. The pentacrinoid larvae were 

 obtained during the last week of July and first fortnight of August, attached to sea- 

 weed, in depths of from IS to 37 meters off Port Erin. 



A letter from Sir William Herdman (written probably about 1922) gives details of 

 the occurrence of Antedon bifida in the vicinity of the Port Erin Biological Station. 

 He writes that it is found off the rockj^ coast outside the breakwater at the southern 

 side of the entrance to Port Erin Bay, frequentlj^ (occasionally in fair abundance) off 

 Bay Fine, just south of Port Erin Bay, and in great abundance off the northern rocky 

 coast of the Calf of Man on a rough bottom in from 18 to 36 meters. On occa- 



558-622—67 15 



