530 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



The oeciostome is larger than an aperture, transverse, orthogonal 

 and concentric. The ovicelled specimens were dredged in February, 

 1908. 

 Occurrence. — 



D. 5141. Jolo Light, Jolo; 6° 09' N.; 120° 58' E.; 29 fathoms; 



co. S. 

 D. 5147. Sulade Island, Sulu Archipelago; 5° 41' 40" N.; 120° 

 47' 10" E.; 21 fathoms; co. S., Sh. 

 Cotypes.—C&t. No. 7373, U.S.N.M. 



MECYNOECIA UN1FASCIATA, new species 



Plate 79, figs. 7, 8 



Description. — The zoarium has the Filisparsa growth form. The 

 tubes of the cellular face are distinct, convex; the peristomie is very 

 long, curved; the peristome is thin and sharp. The ovicell is a long, 

 very convex sac wrinkled transversally ; the oeciostome is large, 

 transverse orthogonal. 



Measurements. — Diameter of peristome, 0.14-0.16 mm.; length of 

 peristomie, 0.50; width of branches, 0.50; dimensions of ovicell, 

 1.28 by 0.46; and oeciostome, 0.11 mm. (length) by 0.20 mm. (width). 

 Affinities. — The tubes are arranged on a single face of the colony. 

 They are very salient and quite fragile. This zoarial form is rather 

 rare in the recent seas and it is the first time that it has been dis- 

 covered with an ovicell of the Mecynoeciidae. 

 Occurrence. — 



D. 4807. Cape Tsiuka, Sea of Japan; 41° 36' 12" N.; 140° 



36' E. 

 D. 5147. Sulade Island, Sulu Archipelago; 5° 41' 40" N.; 120° 

 47' 10" E.; 21 fathoms; co. S., Sh. 

 Hole-type— Cat. No. 8344, U.S.N.M. 



MECYNOECIA RECTANGULATA, new species 



Plate 79, figs. 3-6 



Description. — The zoarium is free, cylindrical, filiform, ramose, 

 the branches are bifurcated at right angles. The tubes are little 

 visible, separated by a very small furrow, convex, wrinkled trans- 

 versely but irregularly; the peristomie is long, somewhat oblique or 

 perpendicular to the zoarial surface; the peristome is thin and orbic- 

 ular. The ovicell is an elongated, very convex sac. 



Measurements. — Diameter of peristome, 0.12 mm.; length of 

 peristomie, 0.20; and width of branches, 0.50. 



Affinities. — The visible length of the tubes is very irregular; it 

 varies from 0.50 mm. to 1.20 mm. The general aspect is as a result 

 very inconstant. The peristomes are often arranged in oblique 

 verticells and at other times in irregular quincunx. 



