298 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



Affinities.- This variety differs from Puellina calamorpha Reuss, 1866, in 

 that the avicularia are longitudinally disposed, the point toward the top. instead 

 of being oblique and even transverse, in the two large oral spines instead of five 

 small ones and especially in its elongated (not transverse) and much larger 

 ovicell. 



The micrometric measurements are very variable. 



fAa=0.04mm. 

 Measurements. Aperture 7 



Ua=O.QG mm. 



Long. Medium. Short. 



(Z3=0.50 mm. 0.40mm. 0.34 mm. 

 Zooecium 7 . n . 



lfe=0.24mm. 0.30mm. 0.24mm. 



This species differs from Puellina radiata Moll. 1803. only in the presence of 

 two oral avicularia. However, Hincks calls attention to some small similar avicu- 

 laria in Moll's species. In our opinion he discussed a distinct species, a fact which 

 he had not noticed. It could very well be, also, that Puellina, calamorpha Reuss, 

 1866. is also a living species. 



This species differs from Puellina simulator in the presence of an oral mncro 

 and in the constancy of the two oral avicularia on all the zooecia and not on 

 ovicelled zooecia alone. 



Occurrence. Upper Jacksonian (Ocala limestone) : Seven miles above Bain- 

 bridge, Georgia (very rare). 



e.Crt.. No. 64028. U.S.N.M. 



PUELLINA SIMULATOR, new species. 

 Plate 41, fig. 21; -plate 84, fig. 14. 



Description. The zoarium incrusts shells, bryozoa, or Orbitoides. The zooecia 

 are distinct, separated by a furrow, elongated, elliptical ; the frontal is convex and 

 formed of 20 to 24 thin costules separated by the very small lacunae and traversed 

 by a line of small lumen pores. The aperture is semilunar, bordered by a peristome 

 bearing four indistinct distal spines. The ovicelled zooecia bear two thin oral 

 avicularia, placed longitudinally, the point above; in the junction angles of the 

 zooecia without avicularia there are some thin avicularia a little longer than usual. 

 The ovicell is imbedded in the distal zooecium, small, globular, improminent, and 

 always closed by the operculum. 



,, iha=0.01mm. 3=0.36-0.40 mm. 



Measurements. Aperture 7 - - Zooecia , 



Ua=0.06 mm. fe=0.22mm. 



Affinities. This species simulates Puellina calamorpha. Reuss, 1866, in its 

 ovicelled zooecia ornamented with two avicularia. It differs from it in its semi- 

 lunar aperture with neither mucro nor proximal convexity, in the larger number 

 of its costules, and in the long avicularia placed in the junction angles of the non- 

 ovicelled zooecia. These latter are much smaller (0.15 mm. and not 0.30 mm.) 

 than the interzooecial avicularia of Puellina radiata Moll, 1803. 



