240 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Measurements. — 



Zooecia \Lz = 0.70 mm. . |k = 0.20mm. 



ovicelled)|Z2 = 0.30 mm. pertUre |Za = 0.26 mm. 



Zooecia \Lz = 0.00 mm. . iha = 0.18 mm. 



(ordinary) \lz = 0.30 mm. [Za = 0.18 mm. 



Structure. — The ectocyst is placed below the costules but applied 

 closely against them; it is united with the proximal portion of the 

 aperture which serves thus for the tentacles and the compensatrix. 

 The costulated area is of variable size and according to the zooecia 

 contains from 3 to 12 costules. The chitinous mandible of the 

 avicularium measures 0.40 by 0.24 mm. The ovicell is formed by 

 the union of the inferior spicules of the distal zooecium; its structure 



Fig. 100.— Opercula of Figularia Jullien, 1886. X85. 

 jucunda, new species 



A, B. Operculum of ovicelled zooecia. C. Nonovicelled zooecium. D. Fi<ju- 

 laria fissurata, new species. 



is identical with that of the frontal; the real ovicell is placed below. 

 All the exterior covering of this species is only a protective covering. 

 The operculum of the ovicelled zooecia is in the form of a trapezium 

 with truncated corners. It has a compensatrix. 



Affinities. — This species differs from Figularia clithridiata Waters, 

 1887, in the orbicular form of the aperture; from Figularia Jig ularis 

 Johnston, 1847, in its smaller dimensions and its much smaller and 

 much more variable costulated area and from Figularia patagonica 

 Waters, 1905, in the absence of supraoral avicularium. Our living 

 specimens from Tacbuc were ovicelled on July 29, 1908; the speci- 

 mens from other localities were dead. 

 Occurrence. — 



D. 5144. Jolo Light, Jolo; 6° 05' 50" N.; 121° 02' 15" E.; 



19 fathoms; co. S. 

 D. 5478. Tacbuc Point, Leyte; 10° 46' 24" N.; 125° 16' 30" 



E.; 57 fathoms; Sh. 

 D. 5580. Sibutu Island, Darvel Bay, Borneo; 4° 52' 45" N.; 

 119° 06' 45" E.; 162 fathoms; br. S.,co.; 13.2° C. 

 Cotypes.— Cat. Nos. 7991-7993, U.S.N.M. 



