248 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Italy (Seguenza, Manzoni). Postpliocene of Italy (Seguenza, Nevi- 

 ani). Pliocene of New Zealand (Waters). 



Habitat. — Mediterranean, Atlantic, English Channel (47-72 fa- 

 thoms), Spain (717 meters), Azores (80-115 meters), Cape Verde 

 Island (21 meters). Pacific: Australia and Heard Island. Indian 

 Ocean: Singapore. 



Plesiotype — Oat. No. 7995, U.S.N.M. 



Genus TRYPOSTEGA Levinsen, 1909 



TRYPOSTEGA PUSILLA, new species 



Plate 22, fig. 8 



Description. — The zoarium encrusts shells. The zooecia are dis- 

 tinct, separated by a furrow, elongated, oval, the point below; the 

 frontal is a little convex, smooth; the aperture is small, elongated, 

 with a triangular elongated rimule. The ovicell is very large, almost 

 as broad as the zooecium, carinated on the median axis. The zooeciu- 

 les are very short. 



Measurements. — 



,_ . , ,jL2 = 0.40mm. ^ , fk = 0.09mm. 



Zooecm (»"»!){,,. . M mm . °P ereulum {; o = 0.07 mm. 



Female zooecia Jly2 = 0.60 mm. » , |k = 0.06mm. 



(with ovicells) [Iz = 0.25 mm. \la = 0.075 mm. 



n • , fi2 = 0.10mm. r^n f^o = 0.01 mm. 



Zooeciules 7 nn _ r Orifice, nM 



[lz = 0.075 mm. Uo = 0.01 mm. 



Affinities. — This species is very well characterized by its small 

 dimensions and especially by the form of its operculum appearing as 

 an elongated small tongue, proximally triangular; moreover, we have 

 not observed on the latter the two lateral indentations noted by 

 Levinsen, 1909, in Trypostega venusta Norman, 1864. (See text fig. 41.) 

 Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 30" E.; 20 



fathoms; S., Sh. 

 D. 5144. Jolo Light, Jolo; 6° 5' 50" N.; 121° 2' 15" E.; 19 



fathoms; co. S. 

 D. 5147. Sulade Island, Sulu Archipelago; 5° 41' 40" N.; 120° 

 47' 10" E.; 21 fathoms; co. S., Sh. 

 Holotype—C&t. No. 7996, U.S.N.M. 



TRYPOSTEGA VENUSTA Norman, 1864 



Plate 22, figs. 9-11 



1920. Trypostega venusta Canu and Bassler, North American Early Tertiary 

 Bryozoa, Bull. 106, U. S. National Museum, p. 330, pi. 85, figs. 15, 16 

 text figure 49 (bibliography, distribution). 



