406 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Genus LAGENIPORA Hincks, 1877 



LAGENIPORA(?) PERFORATA, new species 



Plate 55, fig. 5 



Description. — The zoarium is free, unilamellar. The zooecia are 

 distinct, lageniform, terminated by a long, erect but oblique peri- 

 stomie. The frontal is convex and free; it bears at the base two large 

 perforations a higher triangular avicularium with pivot and with 

 beak more or less salient. The aperture is terminal; it is formed of a 

 semicircular anter and a proximal straight border notched by a 

 narrow rectangular rimule; the peristome is very thick and orna- 

 mented sometimes by short spicules. 



Affinities.— We describe this species even though our unique speci- 

 men is incomplete because it is so strange an animal that we thought 

 it well to figure it. It resembles in its exterior 

 aspect CeUeporella castrocarensis Manzoni, 1875, 

 a fossil from the Pliocene (Plaisancian) of Italy 

 but differs from it in its very straight rimule 

 and in the presence of avicularium and frontal 

 perforations. 



Occurrence. — D. 5579. Sibutu Island, Darvel 

 Bay, Borneo; 4° 54' 15" N.; 119° 09' 52" E.; 

 Fig. 157.— Genus Phy- 175 fathoms; fine S., co.; 13° C. 

 lactella Hincks, 1880 Holotype.— Cat. No. 8215, U.S.N.M. 



Phylaclella collaris 

 Norman 1866. Ovi- Genus ALYSIDOTA Busk, 1856 



celled zooecia, X20 mi i • i • , 



. ... TJ . , ' „, lhe apertura is more or less circular; it 



(After Hincks, 1880). ' „,. 



bears either a lyrule or some cardelles. lhe 

 thick band of the operculum is at a small distance from the edge. 

 The apertura is surrounded by a peristomie more or less funnel-shaped 

 and much dilated proximally; the peristome is interrupted distally 

 and replaced by a small tongue. The frontal is a tremocyst with 

 very fine pores. No spines. 



Genotype. — Alecto {Lepralia) labrosa Busk, 1852. 



Range. — Eocene (Jacksonian) . Recent. 



This is the definition which Canu and Bassler, 1920 gave for the 

 genus PhylacteUa. The genus Alysidota has not yet been admitted 

 by zoologists for it was purely zoarial. Busk created it for all the 

 incrusting uniserial Lepralias. The zoarial form not be ng a generic 

 character, Busk's genus had disappeared, the species classed here in 

 fact belonging to three different genera. According to the new laws 

 of nomenclature it must be held for its genotype, Lepralia labrosa 

 which was chosen by Busk himself. 



