484 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



This charming species differs from Conescharellina delicatula in 

 its salient radial costules and its large apertures. It differs from 

 Conescharellina milleporacea in its more separated apertures, in its 

 wider costules and in its smaller zoarium. 

 Occurrence. — 



D. 5134. Balukbaluk Island, Sulu Archipelago; 6° 44' 45" N.; 



121° 48' E.; 25 fathoms; fine S. 

 D. 5135. Jolo Light, Jolo; 6° 11' 50" N.; 121° 08' 20" E.; 

 161 fathoms; fine Co. S.; 11.3° C. 

 Cotypes— Cat. No. 8276, U.S.N.M. 



o 

 c 



Fig. 207. — Genus Conescharellina D'Orbigny, 1852 



A. C. jucunda, new species. Aperture. B. C. milleporacea, new species. 

 Aperture. C. C. concava, new species. Aperture. D-F. C. elongata, new spe- 

 cies. D. Operculum, X85. E, F. Orbicular and transverse apertures. G. C. 

 breviconica, new species. Operculum, X85. 



CONESCHARELLINA MILLEPORACEA, new species 



Plate 67, figs. 4-11 



Description. — The zoarium is conical, always higher than wide with 

 a very porous general appearance. The apex is sharp pointed. The 

 zooecia from salient radial costules on which the apertures are very- 

 close together and surrounded, each by four avicularia; in the inter- 

 costular furrows there is a row of avicularia very close together and 

 somewhat alternated. The aperture is elongated, elliptical, with a 

 small distal rounded sinus. The proximal pore is transformed into 

 an avicularium with pivot. The base is entire or a little crenulated; 

 it bears a large number of pores and elliptical avicularia with pivot. 



Measurements. — 



. fk = 0.12mm. „ . jh = Z.OO mm. 



Aperture{^ = () 09 _ Q n mm Zoaimmf^ QQ mm 



Variations. — As with all the abundant species this Conescharellina 

 is very variable. When the zoarium dies before its entire develop- 

 ment, the base exhibits some large ribs surrounding a large cancel- 

 lated area. There are small colonies (h = 2mm.) which are neverthe- 

 less complete. On the latter the number of oral avicularia is much 

 more variable than on the large specimens. All the pores of the base 

 appear to be avicularia; but we are not positively certain, never 

 having found a specimen intact. After death these small zoaria arc 

 rolled around easily and become altered rapidly. 



