76 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



are very regular and long on the young colonies (fig. 6). The carinae 

 which ornament them are of salient threads radiating from the center 

 and outlining on the entire inner face an irregular grotesque ornament. 

 We are ignorant of their use but perhaps they correspond to the 

 vibices of the Reteporidae. The central zooecium is surrounded 

 by eight other zooecia. The large colonies are very fragile and rarely 

 entire. Our specimens were dead. 



This species differs from Cupuladria stellata Busk, 1854, in which 

 the zoarial form is identical, in its tuberose instead of smooth inner 

 face. 



Occurrence. — D. 5230. Limasaua Island between Bohol and Leyte; 

 10° 01' 50" N.; 124° 42' 30" E.; 118 fathoms.; gy. S.; 14.3° C. 



Cotypes— Cat. No. 7854, U.S.N.M. 



CUPULADRIA TUBEROSA, new species 



Plate 4, figs. 1-4 



Description. — The zoarium is discoidal, little convex. The inner 

 face is ornamented with radiating, convex costules bearing large 

 adjacent tuberosities; the compartments, hexagonal and subtrans- 

 verse, are arranged on two sides. The zooecia are distinct, adjacent 

 through their mural rim, ogival; the cryptocyst is concave, smooth, 

 supporting the vibraculum; the opesium is oval. The vibracula 

 are large, auriculated, deeply embedded in the distal zooecium; 

 their orifices are alternating in the same radial series. 



Measurements. — 



Opesiumjf = °- 20 -°- 25 mm - Zooeciaif 2 = °- 50 ram ' 



Uo = 0.15mm. lZz = 0.40 mm. 



Affinities. — This species differs from Cupuladria grandis, new 

 species in its large radiating costules and the large tuberosities of 

 the inner face which moreover well characterize it. 



Structure. — The tangential section through the base is character- 

 ized by an irregular reticulum with very thick lines and by very small 

 pores in the compartments. The meridian section shows a series of 

 juxtaposed prisms separated by a canalicule; the calcareous tissue is 

 fibrous. Each prism supports the proximal portion of a cell and the 

 distal portion of another. At the center of the colony there are two 

 lamellae of superposed prisms. It differs very much from the section 

 of C. guineensis given by Busk, 1854. 



In transverse section each prism supports two halves of the cells 

 and the mural rim which separates them. The arrangement is sym- 

 metrical. The prisms appear then to correspond to the radial ridges 

 of the inner face but in no wise to the cells. This is not the structure 

 observed in the genus Cupularia. 



