ART. 14 FOSSIL AND EECBNT BEYOZOA CANU AISTD BASSLER 123 



Genus SCHIZELLOZOON Canu and Bassler, 1917* 



SCHIZELLOZOON ELONGATUM, naw species 



Plate 19, Figures 1-4; text Figure 23 b, c 



Description. — The zoarium is bushy and reticulated; the branches 

 iiave two or three longitudinal ranges of zooecia; the fenestrae are 

 very long, very large, generally much wider than the branches. The 

 dorsal is quite convex, finely granular; the vibices are very salient 

 and form two rows of losanges irregularly alternating; two or three 

 small orbicular avicularia appear on each losange. The zooecia are 

 distinct, separated by a salient thread, elongated, very large, subhex- 

 agonal; the frontal is convex, very finely granular. The apertura is 

 suborbicular, buried at the bottom of the peristomie, with a very 

 broad proximal rimule. The peristomie is thin, salient, expanded, 

 notched; in its proximal part is a reteporidian pore opening into the 

 peristomie. The ovicell is convex, much elongated, adorned with a 

 large longitudinal slit. The frontal bears two very small orbicular 

 avicularia and sporadically a large, very salient, triangular acuminate 

 avicularium with mandible turned toward the base. 



Measurements. — AperturaL ",_ _,^ 



^ Ua = 0.12-0.13 mm. 



.L2 = 0.85-1.00 mm. 



Zooecium , n ca n ^n 



Us = 0.60-0.70 mm. 



Maximum length of fenestrae, 8.00 mm. 



Diameter of branches, 1.5 mm. 



Affinities. — The opercula were altered or absent on our specimens; 

 ~we have not been able to make a good preparation and we have given 

 only an approximate one. The large mandibles are triangular, much 

 thickened, marginated, with a large proximal lucida. 



Only Retepora wallicJiiana Hincks, 1877, of the northern seas can 

 be compared to the present species in the length of its fenestrae. It 

 differs in its wider and more robust branches and in its large ovicell- 

 arian indentation. 



Occurrence.— AUair OSS Station D. 2666; 30° 47' 30'' N.; 79° 49' 

 00" W.; 270 fms. 



Cotypes.—C&t. No. 7587, U.S.N.M. 



Genus RHYNCHOZOON Hincks, 1891 



RHYNCHOZOON CORNIGEE, new species 



Plate 34, Figure 6 



Description. — The zoarium encrusts nullipores. The zooecia are 

 distinct, separated by a furrow, much more elongated at the periphery 

 than at the center of the colony. The frontal is convex, smooth, 

 surrounded by large areolar pores. It bears above the aperture a 

 very salient avicularium umbo and two smaller pedunculate cylin- 



