BRYOZOA OF THE PHILIPPINE REGION 83 



PYRIPORA TENUICAUDATA, new species 



Plate 5, fig. 10 



Description. — The zoarium encrusts shells; the branches are uni- 

 serial and ramify often at a very obtuse angle. The zooecia are very 

 long, formed of a broad, elliptical or oval head and of a very long, very 

 thin gymnocyst, smooth and convex; the mural rim is thin and little 

 distinct. 



Measurements. — 



^ • jho = 0.25 mm. v • \Lz = 0.75-0.85 mm. 



Opesium -, Zooecia-, 



F Uo = 0.125mm. lZ2 = 0.20 mm. 



Affinities. — This species is very well characterized by its long and 

 thin caudal portion. The latter is generally rectilinear but it may 

 become sinuous. The general aspect is that of. a vibrion or better 

 that of a spermatozoid of a mammal. The left part of our figure shows 

 a ramification at an acute angle. Our specimens were dead. 



Occurrence. — D. 5217. Anima Sola Island, between Burias and 

 Luzon; 13° 20' N.; 123° 14' 15" E.; 105 fathoms; crif. gy.S.; 17.2° C. 



Holotype.—C&t. No. 7862, U.S.N.M. 



Family FLUSTRIDAE Smitt, 1867 



." 



The zoarium is corneous, flexible, expanded, foliaceous, erect. 

 The zooecia are subrectangular, contiguous, multiserial. The ovicell 

 is endozooecial (except in Sarsiflustra). No cryptocyst. 



Genus FLUSTRA Linnaeus, 1758 



The zoarium is multiserial, uni, or bilamellar. The mural rim is 

 salient. The septulae of the lateral walls are multiporous. Spines 

 and avicularia are present or absent; 13-16 tentacles. 



Genotype. — Flustra ( Eschar a) foliacea Linnaeus, 1758. 



Subgenus Carbasea Gray, 1848. The zoarium is unilamellar. 

 Type: Flustra (Carbasea) carbasea Ellis and Solander, 1786; 22 

 tentacles. 



Subgenus Chartella Gray, 1848. Type: Flustra (Chartella) papy- 

 racea Ellis and Solander, 1786. 



Genus SARSIFLUSTRA Jullien, 1903 



The larvae are ejected through a chitinous tube which opens distally 

 to the zooecial operculum, and may be covered by a movable cal- 

 careous valve. The avicularia are lyril'onn, interzooccial, of the 

 same size as the zooecia. 



Genotype. — Sarsiflustra (Flustra) abyssicola Sars, 1872. 



Genus KENELLA Levinsen, 1909 



The zoarium is biserial. No spines, no avicularia. 

 Genotype. — KeneUa (Flustra) biseriata Busk, 1884. 



