410 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Waters, 1889, figures still a variety from Australia which belongs 

 perhaps to another genus. 



Waters, 1887, figured an operculum of a specimen from New Zea- 

 land which appears to us distinct. Provisionally until more complete 

 figures are given, we may call this little known species C. zelanica. 



As in the Philippines there are several species of Crepidacantha, 

 certainly in Australia there are also several species confounded with 

 Audouin's species which must still be studied. 



The vibracula of this genus are not very characteristic. The 

 threads are designated as vibraculoid mandibles by Kirkpatrick and 

 as setiform mandibles by ourselves. 



We have a specimen very close to Crepidacantha grandis and which 

 is provided with two triangular avicularia with pivot. Certainly, as 

 in Mastigophora, all the species are not provided with vibracula so 

 that the presence of them alone can not be considered as a generic 

 character. 



CREPIDACANTHA PAPULIFERA. new species 



Plate 57, fig. 8 



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

 tinct, separated by a deep furrow, elongated, hexagonal, or oval; the 

 frontal is convex and bears very close to the aperture a small salient 

 pustule; it is formed of a tremocyst with very small pores. The 

 aperture is small, nonterminal, with convex proximal border; the 

 poster is wider than the anter and the two cardelles are salient; the 

 peristome is thin and crenulated. The ovicell is small, recumbent, 

 marginated, of the same structure as the frontal; it bears a longi- 

 tudinal carina. The aperture of the ovicelled zooecia is a little 

 larger. It has two poriform vibracula on each side of the aperture; 

 just at the level of the cardelles. 



Measurements . — 



A (k = 0.07mm. r, „ • f 1,20 = . 50 mm. 



Apertura ■' "' Zooecia, on 



lZa = 0.07 mm. U2 = 0.30 mm. 



Affinities. — In its oral mucro and its frontal pustule this species is 

 very close to Crepidacantha crinispina Levinsen, 1909, but differs in 

 the carina of the ovicell, in the presence of short spines on the peri- 

 stome, in the pustule adjacent to the aperture and in its ovicell with 

 straight proximal border and not convex. 



Biology. — Our specimens were living. They were in reproduction 

 from February 15 to April 21, 1908. The species is very rare. 

 Occurrence. — 



D. 5145. Jolo Light, Jolo; 6° 04' 30" N.; 120° 59' 30" E.; 



23 fathoms; co. S., Sh. 

 D. 5217. Anima Sola Island, between Burias and Luzon; 13° 

 20' N.; 123° 14' 15" E.; 105 fathoms; crs. gy. S. 

 Cotypes.— Cat, Nos. 8217, 8218, U.S.N.M. 



