246 PROFESSOR P. M, DUNCAN ON THE 
want of costz; and others have them moniliform or multigranular; and a partial epi- 
theca is found in Paracyathus africanus. The bathymetrical range is great, or from 
480 fathoms to a few feet below tide-mark. 
The Flabellum is allied to the common form in the Sicilian Tertiaries, Flabellum 
siciliense. 
Gemmulatrochus simplex is a species of a new genus formed to admit budding Tur- 
binoliidee without pali. The buds do not fall off, as in Blastotrochus, but remain 
attached to the side of the parent corallum, and grow. 
The new genus Bilastosmilia is a remarkable one, on account of the repeated gem- 
mation from a parent, the presence of endotheca, and the rudimentary coste and 
columella. 
The remarks on Caryophyllia calveri and C. pourtalesi, species which were described 
in the former essay, are included in the notice of them in the description of the species. 
These 12 species, added to the 30 described in the former essay, bring the number 
of species of deep-sea corals dredged up in the voyage of H.M.S. ‘Porcupine’ to 42. 
They include a large and predominating number of Turbinoliide ; and there is no 
instance of any form possessing cellular exotheca or exothecal structures binding 
together the corallites, as in reef-builders. One of the species newly described is allied 
to a fossil form; and thus the alliances with the old coral faunas stand :—42 species 
found in the recent fauna; 9 of them lived in the Pliocene, 1 in the Miocene, 1 in the 
Cretaceous, and 5 of the species have alliances with the corals of former ages. 
The résumé of the peculiarities of the deep-sea corals given in page 337 of the former 
essay is shown to be correct by the study of the forms described in this. 
