A crus-. if the stem shows .1 thick coenenchyma in which the calyces are sunken 



almost t<» the axis cylind< lals are not nearly so regular and distincl as in PUicaura 



| n\. with a white noncalcareous centre. 



Spicul» spicules are all smal], terete spindles with regularly disposed annular 



[iving a very symmetrical pattern. Definite layers of spicules can 

 not be made 1 ut, .1- the) seem i<> pack the coenenchyma from the surface nearly to the axis. 

 rhe spi those which Kent figures as characteristic of the genus Verrucella in the 



Monthly M pical Journal, Feb. 1 '. i s 7". Plate XI. Il, fig. 3. 



rhe specimen is a light brown or tan color. The axis is dark brown and the 



3. Plexaura recta new species Plate 11, figs. 3, 3a; Plate I\'. fig. 3). 



Stat. 273. Anchorage off Pulu Jedan, E. coast of Am [slands I V ai 1 Banks). 13 meters. 

 Stat Buka or Cyrus Bay, South coast of Rotti Island. 34 metei . 



Pulu Missa near Flores. J. II. DE SlSO don. 3 specimens. 



1 olony flabellate in form, not reticulate, attaining a height of 59 cm. About 2 cm. above 

 the base the main stem divides into two, and each of these divides often, but not usually, in a 

 dichotomous manner until twigs of the 7 ,h order of division are attained. The nltimate branches 

 are long and slender, erect and parallel. They sometimes attain a length of 39 cm., are round, 

 and of approximately of the same diameter throughout. The main stem is 1 cm. in diameter 

 at its base, and the ultimate branches are from 2 to 3.5 mm. in diameter. The calyces are 

 evenly distributed on all sides and are entirely included when the polyps are retracted, leavin^ 

 but a slightly elevated horder around the apertures. The apertures, in dried specimens, form 

 sharp oval openings. 



The individual calyces are smal! and sunken almost to the axis. The margin is surrounded 

 by well-marked scallops as in the preceding species. The tentacles in the specimen desa 

 often protrude through these a])ertures, although the polyps themselves are entirely retracted. 

 The tentacles are very long, with long delicate fringes. I am unable to find any spicules in 

 the body walls or tentacles. 



A cro tion oi a branch reveals a condition much as in the last species. The axis 



is noncalcareous. with a white centre around which are a number of light-colored strands, none 

 of which are calcareous. The canals are proportionally small and inconspicuous, and their 

 arrangement can not easily be determined. 



Spicules. These are ver)' short, stout, small densely tuberculate spindles, often so short 

 almost globular. The tubercles are so closely crowded as to cover the whole surface 

 almost like the round cells ot a morula. There is no division of spicules into definite layers. 

 dor. The colony is dark brown, in alcohol. Axis black, lightening distally. A specimen 

 - ■ ; is '■( cm. in height, and more profusely branched than the type described. 



