EARLY PALEOZOIC BEYOZOA OF THE BALTIC PROVINCES, 85 



C(ELOCLEMA LACINIATUS (Eichwald). 



Text fig. 25. 



Ccenites laciniatus Eichwald, Letheea Rossica, vol. 1, 1860, p. 459, pi. 27, fig. 9. 



Eichwald has given two figures, here reproduced, of a ceramopo- 

 roid bryozoan from the ''calcaire a schiste argileux inflammable, " 

 wliich I have little hesitancy in identifying as a species of CcdodeTna 

 occurring in the Kuckers shale. His description cites the type-speci- 

 men as an incrusting lamella with the surface irregularly undulating. 

 The specimens before me agree exactly with 

 Eichwald's figure of the zooecia, and, more- 

 over, appear to be incrusting, undulating 

 lamellse, but careful examination showed 

 that they represent in reality the flattened 

 sides of a hollow, tubular, ramose zoarium. 

 Such zoaria spread out at their base into an 

 incrusting expansion, and it is possible there- 

 fore that Eichwald's type represents the base 



„ ^ "1 , \ . Fig. 25.— Cceloclema lacinta- 



mstead or the flattened branch. At any rate, tus. a, eichwald-s type- 

 I beheve that the recognition of Ccenites specimen, natural size, of 



, . . p r^ 1 1 • • 1 Ccenites laciniatus; 6, sue- 



Laciniatus as a species or CceLodema is m keep- face of the same, enlarged. 

 ing with the facts. kuckers shale (C2), estho- 



^ . 1111 ^^- (After Eichwald.) 



The internal structure, although poorly pre- 

 served in the specimens studied, agrees in all respects with that of 

 typical Cododema. The zooecial apertures as shown in Eichwald's 

 enlargement of the surface, are arranged in diagonal rows with a dis- 

 tinct, although little arched, lunarium. Measuring along one of these 

 rows, four zooecia occur in 2 mm. The hollow zoarium of this species, 

 when uncrushed, is about 5 mm. in diameter; the zooecial layer itself 

 is less than 0.5 mm. thick. 



Occurrence. — ^Apparently rare in the Kuckers shale (C2) at Erras 

 and Keval, Esthonia. (Cat. No. 57197, U.S.N.M.) 



Genus CREPIPORA Ulrieh. 



Crepipora Uleich, Journ. Cincinnati Soc. Nat. Hist., vol. 5, 1882, p. 157. — ^Miller, 

 North Amer. Geology and Paleontology, 1889, p. 299. — Ulrich, Geol. Surv. 

 Illinois, vol. 8, 1890, pp. 380, 469; Geol. and Nat. Hist. Surv. Minnesota, vol. 

 3, pt. 1, 1893, p. 322.— PocTA, Syst. Sil. Centre Boheme, vol. 8, pt. 1, 1894, 

 p. 15.— Ulrich, Zittel's Textbook of Paleontology (Eng. ed.), 1896, p. 268.— 

 Simpson, Fourteenth Ann. Rep. State Geologist New York for the year 1894, 

 1897, p. 566.— NiCKLES and Bassler, Bull. 173, U. S. Geol. Surv., 1900, 

 p. 23.— Hennig, ArcMv fur ZooL, vol. 4, No. 21, 1908, p. 9. 



Zoarium incrusting lamellate or massive, or in one species form- 

 ing hollow branches; zooecia long, tubular, thin-walled, with dia- 

 phragms; apertures angular or subpyriform, lunarium not over- 

 arching, its endsusuaUy projecting; mesopores generally restricted 

 to the maculae, which are elevated or depressed. 



