BRYOZOA OF THE PHILIPPINE REGION 81 



1923. Membranipora tuberculata Canu and Bassler, North American Later 

 Tertiary and Quaternary Bryozoa, Bull. 125, U. S. National Museum, 

 p. 22, pi. 33, figs. 3-5 (Bibliography) . 



1920. Nichtina tuberculata Harmer, Polyzoa Siboga Expedition, p. 208, pi. 13, 



fig. 10. (Bibliography.) 



Sporadically some cells contain 1-3 internal cryptocystal, comb- 

 shaped structures or lateral, minute, branched spines beneath the 

 ectocyst (Waters, 1898; Kluge, 1914; Harmer, 192G). The ovary 

 contains numerous eggs and the body cavity, free, isolated eggs 

 (Harmer, 1926). 



This species lives on floating algae. It is universal, but it does 

 not pass the polar circle and is more abundant in the tropical zone. 



Occurrence. — D. 5212. Panalangan Point, east of Masbatc Island; 

 12° 04' 15" N.; 124° 04' 36" E.; 108 fathoms; gy. S., M. 



Geographic distribution. — Eastern Atlantic: France, Senegal, Ma- 

 deira, Angola. Western Atlantic: United States, Chagos Islands, 

 Pernambuco, Rio de Janeiro, Patagonia. Pacific: Kersachee, Califor- 

 nia. Indian Ocean: Bay of Bengal, Burmah. 



Geologic distribution. — Pleistocene of California. 



Plesiotype. —Cat. No. 7859, U.S.N.M. 



Genus ELECTRA Lamouroux, 1816 



ELECTRA DEVINENSIS Robertson, 1921 



Plate 5, fig. 5 



1921. Membranipora devinensis Robertson, Bryozoa from the Bay of Bengal, 



Records of the Indian Museum, vol. 22, p. 51, fig. 7. 



Measurements. — 



Opesiumjf = °- 68 mm - Zooeciumj^ = °- 80 mm ' 



Uo = 0.30mm. \lz = 0A0 mm. 



Operculum!^ " 18 mm - 

 \ top = 0.14: mm. 



Affinities. — The differences between our specimens and Miss 

 Robertson's figures are of little importance; sometimes 3 tubercles 

 instead of 2, 19 pairs of spines instead of 20, and hollow salient 

 tubercles instead of simple pores. 



This species belongs to the group of Membranipora bengalensis 

 Stoliczka, 1860, the species of which live in brackish waters. 



Our specimen was living and had been collected on a marine alga 

 rather far from the coast in the Pacific. Miss Robertson's specimen 

 was attached to a fragment of wood. 



The chilostomatous bryozoa usually die in brackish waters as they 

 are truly marine animals. Some Membranipores seem to make 

 exceptions, such as those cited by Robertson, 1921, and by Stoliczka, 

 1860, as well as M. combesi Canu, 1907, a fossil from the French 



