V. '07. 24 



In several of the younger specimens the bilateral arrange- 

 ment of the autozooids is very clearly seen, as is also the broad 

 band of siphonozooids which runs to the base of the primary 

 autozooid. This band, according to Jungersen (1904) must be 

 considered as dorsal. On the opposite, or ventral, side of the 

 colony the young autozooids arise. In the series of Irish 

 specimens young autozooids may be seen in various stages of 

 development. In most of the specimens minute rudiments of 

 autozooids, resembling the siphonozooids in appearance, are 

 to be seen. It may be added that the numerous calcareous 

 spicules which are present at the lower end of the peduncle 

 average '008-'014 mm. in length by *005-'008 mm. in breadth, 

 and are similar to those occurring in the typical U . encrinus. 



As regards the distribution of U. encrinus, Jungersen says 

 it " is limited to the Arctic Ocean, and to the deeper part of 

 " the Atlantic which has the character of the Arctic Sea by 

 ' ' being situated west of the coast-banks of the Scandinavian 

 ' ' peninsula and north of the submarine ridges connecting 

 " Greenland with Iceland, Iceland with the Faroes, and these 



" latter with the Shetland Islands I doubt very 



" much whether the species 17m 6. encrinus would be found 

 ' outside the territory so well bounded geographically where 

 " it is really known." 



These specimens, here named U. encrinus, var. ambigua, 

 extend the distribution further south, but in a modified form. 



MADREPORARIA. 



FAMILY TURBINOLIIDAE. 

 Flabelhim alabastrum, Moseley. 



A fine specimen of this coral was dredged, living, at 

 S.E. 497. Lat., N., 51 2'; Long., W., 11 36'; 775-795 

 fms. ; 10th September, 1907. 



It is 45 mm. in height, the longer diameter measures 68 

 mm., the shorter, 30 mm. 



Flabellum alabastrum was first taken by the Challenger in 

 1,000 fms. off the Azores (Moseley, 1880). Later on many 

 specimens were obtained by the Hirondelle (,/ourdan, 1895) 

 off Newfoundland and the Azores. Marenzeller (1904) again 

 records it for the North Atlantic. 



Stephanotrochus diadema, Moseley. 



S.E. 363. Lat., N., 51 22'; Long., W., 12 0'; 695-720 



fms.; temperature at 600 fms., 7'92 C. ; 10th 



August, 1906. 

 S.K. 477. Lat., N., 51 15'; Long., W., 11 47'; 707-710 



fms.; bottom temperature, 7'19 C. ; 28th August, 



1907. 

 S.K. 489. Lat., N., 51 35'; Long., W., 11 55'; 720 fms. ; 



4th September, 1907, 



