xoirrn AMKP.K-AX KAKLY TKRTIARY BRYOZOA. 173 



STAMENOCELLA GRANDIS. new species. 



I>i x('i-!j)tii>ii. The zoarium is hihmellar and free. The zooeeia a-re large, dis- 

 tinct, very elongate, narrow, especially at the back: the mural rim is thin, salient, 

 cm-veil, thinnest at the base. The ope-.ium is large, entire, elliptical. The avicu- 

 lariitm is small, salient, obliquely directed toward the top of the zoarium. 



. ( /9=0.< >0-0. To mm. . \Lz=\. 10-1.20 mm. 



x- Opesia , Zooecia], 



[20=0.20-0.22 mm. lfe=0.32-0.35 mm. 



unil i/fffn/ficx. The mieroinetric measures are quite variable, but are 

 alway> larger than those of closely allied species. We have specimens from near 

 Monrneville. Alabama, and near Woodward. Mississippi, where the zooecial length 

 is 1 mm. At the Chipola River locality they vary between 0.84 mm. and 0.00 mm. 



The surface ornamentation is much less variable than in /S. mediaviculifera 

 which probably inhabited areas with more rapid marine currents. The form of the 

 zooecium is that of a stamen with a large anther whence the generic name. 



Occurrence. Yicksburgian ("Chimney rock " of Marianna limestone): One 

 mile north of Monroeville. Alabama (rare). 



Vicksburgian (Byram marl): One-fourth mile Avest of Woodward. Wayne 

 County. Mississippi (rare). 



Upper Jacksonian (Ocala limestone) : Chipola River. east of Marianna. Jack- 

 son County. Florida (very rare). 



ffolotype.Csit. No. '63946, U.S.X.M. 



STAMENOCELLA INTERMEDIA, new species. 



Plate 81, fig. 5. 



Description. The zoarium is free, compressed, formed of two lamellae growing 

 back to back and inseparable. The zooecia are distinct, elongated, with a concave 

 gymnocyst; the mural rim is thin, salient, curved, finely granulated. The opesium 

 is elliptical or oval, the narroAv part at the base. The hyperstomial ovicel] appears 

 voluininoii.-. The avicularium is placed in the middle of the gymnocyst; it is large 

 and salient: its orifice is oblique and turned toward the lower part of the zoarium. 



Affinities. We have found only the single fragment figured which has appeared 

 very interesting to us on account of its general aspect which approaches that of a 

 Bn<inlo with a bilamellate zoarium. 



Stamenocetta intermedia differ- from A. mediaviculifera in its smaller micro- 

 metric dimensions and its four longitudinal rows of zooecia. 



It is readily distinguished from StanicnoceUa nii<ln-i/i//inif-n by its avioularinm 

 directed toward the base of the zoarium. 



This species is really intermediate between typical stm/i, noci Hit and the afore- 

 mentioned group of Mcinlirmi'i jm,;i (Flustrella) polymorpha D'Orbigny. ls;,2. 



Occurrence. Yick>lmrgian ((ilendon member of Marianna limestone): West 

 bank of Conecuh River, 1 mile below mouth of Sepulga River. Escambia County, 

 Alabama- (very rare). 



zt. Xo. c.4-2.-y.. r.s.x.M. 



