BRYOZOA OF THE PHILIPPINE REGION 79 



parent; the walls of the central canalicule touch each other through- 

 out almost their entire length. 



In thin tangential sections of the inner face the compartments are 

 irregularly polygonal, formed of a calcareous, alveolar tissue per- 

 forated by very small pores invisible externally (fig. 8). The thin 

 section in the marginal zooecia shows (fig. 9) the special mode of 

 gemmation characteristic of all species of this genus. Some of our 

 specimens were living. 



Occurrence. — D. 5358. Sandakan Light, Jolo Sea; 6° 06' 40" N.; 

 118° 18' 15" E.; 39 fathoms; M. (common). 



Cotypes.— Cat. No. 7857, U.S.N.M. 



CUPULADRIA HEXAGONALIS, new species 



Plate 5, figs. 1-4 



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

 face is garnished with salient tuberosities, very close together, adja- 

 cent to each other; the compartments are distinct, separated by a 

 furrow, irregularly hexagonal: The zooecia are little distinct, irregular, 

 elongated; the cryptocyst is thick, shallow; the opesium is elliptical, 

 denticulated. The vibraculum is small and auriculated. 



Measurements. — 



Opesium!^ = ' 25 mm - Zooecium(^ = - 50 mm - 



1 Uo = 0.15mm. Xlz = 0.25-0.30 mm. 



Affinities. — This species differs from Cupuladria granulosa in the 

 presence on the inner face of adjacent tuberosities and not of scat- 

 tered granules. It differs from Cupuladria tuberosa in its smaller 

 tuberosities not arranged on the radial costules and from C. guineensis 

 Busk, 1854, in its thicker mural rim and in the larger and more 

 adjacent granulations. 

 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.— Cat. No. 7858, U.S.N.M. 



Family ELECTRINIDAE D'Orbigny, 1851 



The genera which we now refer to this family are Electra Lamouroux, 

 1816, Nitscheina Canu, 1900, Tretosina Canu and Bassler, 1927, 

 Heterooecium Hincks, 1892, Pyripora D'Orbigny, 1852, Mystriopora 

 Lang, 1915, Herpetopora Lang, 1914, Tendra Nordman, 1839, Aspi- 

 delectra Levinsen, 1909, and Taphrostoma Canu, 1908, all of which, 

 except Tendra and Taphrostoma arc described and illustrated in our 

 work of 1920, 1923, or 1927. The differences between Tendra and 



