ALCTOBTAiaA.. 581 



spicules in th.e cortex, and the branches arising from the soft joints. 

 It has no special connexion with Dr. Gray's group EUiselladse, in 

 which he placed it, and appears to have been overlooked by recent 

 writer's. It is distinguished by the very massive form of the Blatt- 

 keule spicules and the swelling out of their " Blatt " into rounded 

 bodies with scarcely perceptible edges. 



7. Wrightella chrysantlms. 

 Wrightella chrysanthos, Qray, op. cit. p. 32. 



Both this and the following are small species, not known to ex- 

 ceed 4 inches in height, and they are proportionally slender ; they 

 -do not exhibit the lateral impression on the branches described by 

 Dr. Gray. They are nearly allied to each other, and Mopsea eryihrma 

 of Ehrenberg (I. c), from the Red Sea, must be referred to the same 

 genus. A well-preserved spirit-specimen, 61 millim. (2| inches) 

 long, and some fragments represent W. chrysanthus in this collection ; 

 they are of the normal white colour with lemon-yellow zooids. 

 A variety occurs in the British Museum in which the cortex also is 

 yellow. 



Hab. Seychelles Islands, 4-12 fms. 



8. Wrightella coccinea. 

 Ch-ay, op. cit. p. 32. 



This species is distinguished from the former by its colour and by 

 the cortical spicules being somewhat smaller than in that species. 

 Some fragmentary (but spirit) specimens occur here. Gray has 

 omitted to mention a fact which these and the original specimens 

 show, that the verrucse are usually yellow. 



Hah. Seychelles Islands, 4-12 fms. 



Both species were originally described from this locality, where 

 they were collected by Prof. E. P. Wright. I am glad to have this 

 opportunity of pointing out the true affinities of these two beautiful 

 little species, which in their slender proportions probably approach 

 the beautiful Psilacabaria of the Australian collection more nearly 

 than any other described species. 



