STYLASTER. 35 



Stylaster filogranus Pocrt. 

 Plate v., figs. 13 and 14. 



Corallum a dense and elegant flabellum, the branches setting oft' 

 at an angle of 35^ to 40°. Sometimes a few aberrant branchlets 

 ont of the plane, very rarely coalescing ; the branchlets generally 

 bending slightly out of each other's way. Main branches consider- 

 ably thickened. Calicles comparatively large, regularly alternate 

 on the terminal branchlets, about one diameter apart; this position is 

 preserved on the larger branches, but on the main stem the calicles 

 become obsolete. Calicles transversely elongated, Avith prominent 

 outer lip ; the inner one almost merged in the camenchyma. Septa 

 generally twelve, prolonged rather deeply in the fossa ; tertiary 

 rudimentary septa scarcely visible. Columella styliform, hirsute, too 

 deeply seated to be seen from outside. Color light pink, fading into 

 white in the younger branchlets. The color diffused through the 

 entire thickness. 



Spread and height of corallum, 10 to 15 cm.; thickest branches, 

 5 to 10 mm. in diameter; calicles, 0.8 to 1 mm. 



West of Tortugas ; ? fathoms (label lost). 



Stylaster Duchassaingii Pourt. 

 Stijlasler dcrjans DuCH. & Micu. 



Plate VI., figs. 1 and 2. 



As stated by me in Bull. Mus. Comp. Zool., No. 6, the name St. elegans 

 was preoccupied by Verrill (January, 1864) when Duchassaing and 

 Michelotti published their Supplement an Mhioire, &c. (May, 1804). A 

 Stylaster found near Tortugas in 43 fathoms agrees pretty well with 

 those authors' description and figure, though the latter is not detailed 

 enough for safe identification. 



The calicle in this species is quite small and is invaded in its upper 

 half by the crenenchyma, thus forming a transition to the forms for 

 which Mr. Kent has established his genus Stenohelia. 



The color of my specinrens was white or pale pink, with bright pink 

 amjDullaj. 



