204 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



phonic, fairly straight, without evident internodes, and reddish 

 brown in color. The pinnae are also without evident internodes and 

 are subalternate in position. Hydrothecae borne on main stem 

 and pinnae and on very short pedicels, so short that the hydrothecae 

 often appear to be sessile. Hydrothecae made of rather dense 

 chitin, bell shaped, with a squarish margin which has two annular 

 markings just below it. There are four large quite evident marginal 

 teeth, as in many species of the genus Sertularella. In some cases 

 the four-flapped operculum is quite distinct. 



Gonosome.— Unknown. 



Locality. — Dredging station 5149, Sulu Archipelago, vicinity of 

 Sirun Island, 5° 33' N., 120° 42' 10" E.; depth, 10 fathoms. 



So far as the hydrothecae are concerned, this species comes very- 

 near SertulareUa, the well-known Sertularian genus, and it may 

 finally be placed there when the gonosome and soft parts are known. 



Distribution. — Australia (Bale, Stechow). 



Family CAMPANULINIDAE 



STEGOPOMA PLICATILE (M. Sars) 



Lafoea plicatUis Sars, Vidensk. Selsk. Forhandl., Christiania, 1862, p. 31. 

 Calycella pUcatUis G. O. Sars, Vidensk. Selsk. Forhandl., Christiania, 1S62, 



p. 117. 

 Stegopoma plicatile Levinsen, Meduser, Ctenophorer og Hydroider fra 



Gronlands Vestkyst, 1893, p. 36, pi. 6, figs. 1-7. 



The best description and figures of this species that I have been 

 able to find are by Levinsen in the last paper referred to above. Al- 

 though M. Sars gives a fairly good figure which shows the char- 

 acteristic features well. As I have not found a complete description 

 of this species, it seems advisable to insert the following: 



Trophosome. — Colony 8 cm. in height and with a spread of 4 cm. 

 Stem and larger branches fascicled and bearing irregularly scattered 

 hydrothecae between the branch origins. Ultimate branches simple 

 and alternate. Hydrothecae sessile or even slightly immersed on 

 main stem and branches and alternate on ultimate branches, stand- 

 ing at an acute angle with the stem or branch and. considerably 

 smaller than those of other species, being usually less than a mm. 

 in height and practically sessile, each being borne on a shoulder of 

 the branch. They are subtubular in shape, increasing gradually 

 in diameter toward the aperture. Operculum much as in other 

 species of this genus consisting of two pleated flaps like the roof 

 of an "A" tent ; there is a distinct diaphragm. 



Gonosome. — Missing in the material secured by the Albatross, but 

 according to Levinsen the gonangia are borne on the stem and main 

 branches near the branch origins, are greatly elongated sacklike 



