136 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



CALESCHARA JUNCTIFERA, new species 



Plate 14, figs. 7, 8 



Description. — The zoarium is free and formed of small quadrangular 

 rods. The zooecia are distinct, separated by a furrow, elongated, 

 subelliptical ; the mural rim is thick, round, salient, granulated; 

 flat; the superior cryptocyst is a very long, convex, true polypidian 

 lamella, separated from the mural rim by opesiular indentations at the 

 bottom of which are three or four small trabeculae or connecting bars. 

 The opesium is large, very elongated, semielliptical; the proximal 

 border is elevated and laciniated. 



Measurements. — 



„ . (k=0.44mm. „ . [is = 0.80 mm. 



Ope S mm( Zo = 2Q mm Zooeclum izz= 0.36-0.40 mm. 



Affinities. — The long polypidian lamella is very fragile and complete 

 examples of it are very rare; the small trabeculae which unite it to 

 the mural rim and strengthen it are themselves very fragile. Most 

 often the opesium is a large opening with its proximal border bearing 

 a kind of serrate denticle. There are, moreover, all the stages be- 

 tween the small denticle and the completely developed polypidian 

 lamella. We have not observed the ovicell. Our specimens were 

 dead. 



The species resembles very much Acanthodesia savartii cetrata 

 Harmer, 1926, where the exaggerated development of the serrate den- 

 ticle makes it resemble a polypidian lamella. It differs however in 

 the regularity and the great convexity of the median process, in the 

 presence of a greater number of trabeculae, in the greater micro- 

 metric measurements and in its granulated cryptocyst. 



This species differs from the quadrangular form of Galeschara 

 denticulata MacGillivray, 1869, in its narrower opesiular indentations 

 with trabeculae. 



Occurrence. — D. 5235. Nagubat Island, east coast of Mindanao; 

 9° 43' N.; 125° 48' 15" E.; 44 fathoms; soft M. 



Cotypes — Cat. No. 7938, U.S.N.M. 



CALESCHARA LAXA, new species 



Plate 14, figs. 5, 6 



Description. — The zoarium is free, unilamellar or encrusting pebbles 

 and nullipores. The zooecia are distinct, joined by their mural 

 rims or separated by a small discontinuous furrow, hexagonal, 

 broad, and spread out. The mural rim is thick, granulated, broad, 

 rounded, little salient; the cryptocyst is shallow, plain, granulated; 

 the polypidian lamella is subcylindrical, very salient, bordered 

 by two very deep and divergent opesiular indentations. The opesium 

 is orbicular, the proximal border straight. The ovicell is endo- 

 zooecial, very large, quite convex, smooth. 



