EAEL.Y PALEOZOIC BRYOZOA OF THE BALTIC PROVINCES, 105 



ciated biyozoans, there are several species with a similar method of 

 growth, but none of them has the internal vesicular tissue. The 

 species is represented by only a few specimens, all of which are small. 

 It is possible that, with more examples, the resemblance to F. laxata 

 will be found such that F. discoidalis may be considered only as a 

 variety. At any rate, the two forms are closely related. 



Occurrence. — Apparently rare in the Echinospherites limestone (Cl) 

 at Katlino and at Pulkowa, government of St. Petersburg. 



Holotype.— Cat. No. 57176, U.S.N.M. 



Sections of the type-specimen are in the British Museum. 



FAVOSITELLA ? PUNCTATA, new species. 



Text fig. 38. 



Cfr. Archeopora punctata Eichwald, Lethsea Rossica, vol. 1, 1860, p. 406, pi. 24, 

 fig. 19. 



This interesting bryozoan is undoubtedly a member of the Ceramo- 

 poridge, but its generic position is a matter of less certainty. As a 

 provisional arrangement, I have placed it under Favositella, recog- 

 nizing the fact that future studies will most probably cause its refer- 

 ence elsewhere. 



Fig. 38.— Favositella? punctata, a, cellxjlifeeous side of a zoaeium, X2, "with the elongated, 



ALMOST confluent MACULiS; 6, BASAL SIDE OP SAME SPECIMEN, X2, SHOWING ATTACHMENT TO A SMALL, 

 EAMOSE bryozoan; C, TANGENTIAL SECTION, X20; d, VERTICAL SECTION, X20. WASSALEM BEDS (D3), 

 UXNORM, ESTHONIA. 



The zoarium is tliin and explanate, beginning growth upon some 

 foreign object, as the ramose bryozoan shown in figure 38 J, and con- 

 tinuing until a lamellate, epithecated expansion, a centimeter or 

 more in diameter, and several millimeters thick results. The cellu- 

 liferous sm-face presents no monticules or tubercules, but is uneven 

 because of the narrow, slightly depressed, elongated maculae, which 

 iare bare of apertures and are often almost confluent. Apertures 



