503 
MR. H. N. MOSELEY ON THE STRUCTURE OF THE 
STYLASTERIM. 
hardened and in best condition, not having been specially prepared with a view to 
microscopic examination , 
Lepidopora cochlecita is essentially similar in the structure of the soft parts to 
Errina labiata. The dactylozooids are especially numerous and closely packed. The 
gastrozooids have four tentacles. The nematophores are like those of Errina, as are 
also the female gonophores. A female specimen only was available for examination. 
The specimen of Pliobothrus tubidatus was not well preserved, but in the gastrozooids 
there was seen an appearance as of very short tentacles more than four in number. I 
am uncertain whether tentacles are really present ; it seems improbable that such can 
be the case. 
From a study of the specimens of Stylaster Madeirensis (Johnston), Stenohelia 
Madeirensis of Kent, in conjunction with some specimens obtained by H.M.S. 
‘ Challenger/ but only lately available for examination, I conclude that the genus 
Stenohelia should be preserved with the following characters : — 
Genus Stenohelia, Savile Kent (Ann. and Mag. Nat. Hist., 1870, vol. v. p. 120). — 
Corallum delicate ; branching flabelliform ; pores in regular cyclo-systems only. 
Cyclo-systems all turned towards one face of the flabellum. Dactylopores 
without a columella or with a very rudimentary one. Gastropores very deep 
and curved, so as to tubulate in all but the older branches the entire lengths of 
the axes of the branches ; with small styles, seated at the bottoms of these 
tubes and directed parallel to the axes of the branches at right angles to 
those of the mouths of the cyclo-systems. 
Species Stenohelia Madeirensis, Kent. 
Stenohelia profunda, sp. n., H. N. M. — Off St. Thomas, Danish West 
Indies, 450 fathoms. 
A further specimen, also dredged by H.M.S. £ Challenger,’ seems to require the 
formation of an additional genus which I call Conopora, of which the following are 
the characters : — 
Genus Conopora, gen. nov., H. N. M. — Corallum delicate ; with pores in regular cyclo- 
systems ; branching irregularly, the cyclo-systems having their mouths turned 
in all directions. Cyclo-system masses conical in form. Both kinds of 
pores devoid of a style. Gastropore with two chambers, the upper opening 
into the lower by a circular aperture. Differs from Cryptohelia and Astylus 
in having no lid or tongue-like process and in not forming a regular flabellum. 
Species Conopora tenuis, sp. n., H N. M.— Dredged off the Kermadec Islands, in 
650 fathoms. 
Possibly this species should be placed in the same genus as Verrill’s 
Gyclopora hello,, = Stylaster bella (Dana), see p. 481 ; but the descriptions 
in the old terminology are inadequate to determine the point. If so, 
Cyclopora may be revived as a genus with the above characters. 
MDCCCLXXVIII. 3 T 
