174 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



This genus differs from Cellaria in the terminal arrangement of 

 the aperture, in the absence of a salient thread around it, in its ovi- 

 cell, in which the visible part is formed by the development of the 

 mural rim, and in the ovicell orifice facing proximally. 



The known species of this genus are : 



Stomhypselosaria condylata Canu and Bassler, 1927 Recent. 



Stomhypselosaria dupliforma, new species Recent. 



Stomhypselosaria (Quadricellaria) laciniosa Canu and Bassler, 1920_ Jacksonian. 



Stomhypselosaria (Quadricellaria) burnsi Canu and Bassler, 1920 Jacksonian, 



The ovicell of Salicornaria dubia Busk, 1885, has been figured by 

 Waters, 1904. It is salient and globular as that of Stomhypselosaria, 

 but the orifice is much more distant from the apertura, and there are 

 zooecia transformed into avicularia. We hesitate, then, in intro- 

 ducing this species in this genus, especially because the figures of 

 Busk, 1885, and of Waters, 1904, are very different. 



There are two groups in the genus, one articulated and the other 

 not articulated but all the species appear radicelled. 



STOMHYPSELOSARIA CONDYLATA Canu and Bassler, 1927 



Plate 20, fig. 1 



1927. Stomhypselosaria condylata Canu and Bassler, Classification Cheilosto" 

 matous Bryozoa, Proc. U. S. Nat. Mus., vol. 19, art. 14, p. 4, pi. 1» 

 fig. 3. 



Description. — The zoarium is free, cylindrical, bifurcated. The 

 zooecia are distinct, separated by a furrow, elongated, ogival; the 

 mural rim is thin above, enlarged on the sides, convex, smooth; the 

 cryptocyst is small, rectangular, very deep in the vicinity of the 

 apertura, where it rises in order to form the proximal lip of the aper- 

 tura. The apertura is deep, oblique, semielliptically transverse; the 

 proximal border is a thin salient lip with two small lateral indentations. 

 The ovicell is large, convex, opening obliquely above the apertura. 

 The ovicelled zooecia bear on the mural rim two large salient condyles 

 placed between the ovicell and the apertura. 



Measurements. — 



~ . ffto = 0.10-0.12mm. ~ \Lz = 0.50-0.60 mm. 



Opesium< 7 _,. _ , Zooecium 7 _ _ 



^ [lo = 0.14-0.16 mm. \lz = 0.40-0.50 mm. 



Affinities. — This new species differs from Stomhypselosaria dupli- 

 forma in the absence of a double mural rim, in its rectangular crypto- 

 cyst, and the presence of condyles. It differs from Cryptostomaria 

 crassatina in the visible orifice of its ovicell and in its smaller dimen- 

 sions. Our specimens were dead and deprived of all chitinous 

 appendages. We are ignorant of their mode of fixation. 



