302 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



EMBALLOTHECA LATISINUATA, new species 



Plate 33, fig. 5 



Description. — The zoarium is rarely unilamellar and encrusts 

 nullipores and especially shells. The zooecia are distinct, separated 

 by a salient thread, arranged at the bottom of a furrow, somewhat 

 elongated, hexagonal; the frontal is convex and covered with scattered 

 tremopores; a submedian, triangular, elongated, oblique avicularium 

 appears in the vicinity of the apertura. The apertura is transverse 

 and is formed of a semicircular anter and of a broad rimule; the 

 peristome is thin and little salient. The ovicell is globular, buried 

 in the distal zooecium, closed by the operculum of the same nature 

 as the frontal and entirely surrounds the peristome. 



Measurements. — 



A (k-0.12mm. ~ • \Lz =0.50-0.60 mm. 



Apertura _ "' Zooecia 



[la -=0.15 mm. viz =0.40-0.50 mm. 



Affinities. — The operculum is almost orbicular; it bears a strong 



peripheral sclerite with two lateral attachments. 



This species differs from Schizoporella lata MacGillivray, 1882, in 



the form and direction toward the top of the avicularium; the two 



species are very closely allied. It differs from Schizoporella pach- 



noides MacGillivray, 1886, in its nonmedian and nonlongitudinal 



avicularium. 



Biology. — The species was in reproduction and fixation on February 



15, 1908 (36-42 meters). 



Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 30" E.; 20 



fathoms; S. Sh. 



D. 5145. Jolo Light, Jolo; 6° 04' 30" N.; 120° 59' 30" E.; 23 



fathoms; co. S., Sh. 



D. 5577. Mount Dromedario, Tawi Tawi; 5° 20' 36" N.; 119° 



58' 51" E.; 240 fathoms; crs. S.; 12.4° C. 



Holotype.—C&t. No. 8050, U.S.N.M. 



EMBALLOTHECA INGENS, new species 



Plate 33, fig. 1 



Description. — The zoarium encrusts shells. The zooecia are dis- 

 tinct, separated by a deep furrow, somewhat elongated, elliptical; 

 the frontal is very convex, covered with small tremopores, separated 

 by granules; it bears close to the apertura an elliptical transverse 

 avicularium with pivot and a very salient beak. The apertura is 

 transverse with a concave proximal border; the apertura of the 

 ovicelled zooecia is larger. The ovicell is very large and covers almost 

 all the frontal of the distal zooecia; it is absolutely identical in nature 

 with that of the frontal. 



