486 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



little undulated on the periphery; it bears a large number of pores; 



it is somewhat convex or slightly costulated. 



Measurements. — 



a , [Aa = 0.14mm. „ • ffe = 3.00mm. 



Aperture^ Zoarium^ , 



^ Ua = 0.10mm. \d = 2.5 mm. 



Affinities. — The pores of the base are very variable; they are very 

 inequal and somewhat oriented although sometimes they are equal 

 and arranged in quincunx. We have observed special zooecia 

 characterized by a very large circular aperture. We are ignorant of 

 its function. 



This new species differs from Conescharellina milleporacea in the 

 absence of avicularia on the radial costules, in a large aperture and 

 in its larger colonies. 



The longitudinal section shows 8-9 longitudinal rows of inner 

 zooecia and with thick walls in which the avicularia are lodged. 

 Around the apex there are avicularia only. 



The wall of the inner zooecia is very thick and this character is 

 quite visible on the transverse section. 



Biology. — Specimens from the Sulu Sea have an aspect somewhat 

 different from those of the Sea of Japan, but it is impossible to dis- 

 cover different specific characters. The aspect of the exterior calci- 

 fication is evidently in close connection with the habitat. 



This is one of the rare species which passes beyond the Tropics and 

 penetrates into the temperate zone. It appears to accommodate 

 itself to the most variable depths. 

 Occurrence. — 



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

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



19 fathoms; co. S. 

 D. 5162. Tinagta Island, Tawi Tawi Group; 5° 10' N.; 119° 47' 



30" E.; 230 fathoms; S. brk, Sh., crs.; 11.6° C. 

 D. 5213. Destacado Island, east of Masbate Island; 12° 15' N.; 

 123° 57' 30" E.; 80 fathoms; S. M., Sh. 

 Cotypes — Cat. Nos. 8280, 8281, U.S.N.M. 



CONESCHARELLINA TRANSVERSA, new species 



Plate 68, figs. 11-13 



Description. — The zoarium is conical, little elevated, transverse; 

 the apex is very obtuse. The zooecia are arranged along the side 

 of 12-16 salient smooth costules and bearing poriform avicularia. 

 The aperture is elongated, oval, with a small distal sinus. At the 

 bottom of the furrows, there are large elliptical, separated avicularia. 

 The base is crenulatcd at the circumference, a little convex, orna- 

 mented with large pores arranged vaguely in radial lines. 



Measurements. — Aperture \-,' a ~ ' mm ' 



\la = 0.1 lmm. 



