1024 DR. G. HERBERT FOWLER ON THE Dec. 13, 



an epiplanktonic form; it was plentiful at the surface, but in 

 and 20 d onl y single specimens were captured, which were probably 

 dead or dying and sinking to the bottom. 



For the horizons of capture, see the table on p. 1022. 



COLLOZOUM spp. 



Of this genus there were apparently two separate species 

 represented in my collections, neither of which could be attributed 

 to Collozoum inerme from the warm Atlantic, or to C. ellipsoides, 

 described by Haeckel from the Eaeroe Channel. In the one type 

 the largest spherical zooids of the colony measured about '05 to 

 07 mm. in diameter, in the second type about *09 to '16mm.; 

 both had about *2 to *28 mm. of calymuia and alveoli outside the 

 zooids. In the first type there was a considerable thickness of 

 alveolar calymma in the centre of the colony, as in the ordinary 

 G. inerme; but in the spherical or lenticular colony of the second type 

 the zooids were so closely aggregated in the centre of the colony 

 as all but to touch one another, and were surrounded by a thick 

 alveolar layer and a thick radiately striate calymma, exactly as a 

 Thalassicolla. 



Although I have no doubt that at least one undescribed species 

 of Collozoum occurs in these waters, I do not feel justified in 

 naming and describing it without a detailed examination of living 

 material. 



Both types were confined to the Epiplankton, except for a few 

 specimens in haul 13 , which appears to have remained open 

 through higher horizons than was intended or nt first believed, 

 and is now included with the doubtful hauls. As the Collozoum 

 occurred in 30/ of the Epiplankton hauls, and in no undoubted 

 Mesoplankton haul, I think we are justified in regarding it as 

 essentially epiplanktonic. 



For the horizons of capture, see the table on p. 1022. 



LAMPOXANTHIUM MURRAYANUM, sp. n. 1 



Definition of the Species. Spicules of the skeleton numerous, 

 geminate-radiate, with a short axial rod, from each of which 

 spring three or four acute shanks, devoid of branches or forks 

 (sometimes three shanks at one end, four at the other). Both rod 

 and shanks smooth and straight ; shanks two to three times the 

 length of the rod. Calymma full of large alveoli. Diameter of 

 calymma 3'5 mm. ; diameter of central capsule 1 mm. 



This large and beautiful species is undoubtedly referable to 

 Haeckel's genus Lampoxantliium ; but I am unable to place it with 

 certainty in any of his subgenera, and it agrees with none of his 

 species. In addition to the geminate -radiate spicules there are 



1 I have great pleasure in dedicating this species to Sir John Murray, 

 K.C.B., F.E.S., who is specially associated with the Faeroe Channel by his part 

 in the exploration of the district in the ' Knight Errant' (1880) and ' Triton ' 

 (1882). 



