*RT. 22. CYCLOSTOMATOUS BRYOZOA CANU AND BASSLER. 127 



on the other side of the basal lameUa; they are bent at right angles 

 and are terminated obliquely and directed toward the base. We are 

 unable to say if they were completely independent of the adjacent 

 tubes or if they were formed from the divergent branches. We be- 

 lieve more in their independence, for the cylindrical tubes multiply 

 by successive bifurcation, which is not the case. Moreover, the dorsal 

 may be formed by two lamellae of vacuoles. The j)resence of a 

 polypide is therefore not necessary to the life of the accessory tubes. 



The base of the zoarium is expanded. Unfortunately we have not 

 been able to make a section and wc are ignorant of its mode of for- 

 mation. 



The ovicell slightly resembles Pleuronea; but in the family Tubu- 

 liporidae the tubes surrounded by the ovicell never modify their 

 length. On the contrary, in the family Ascosoeciidae the peristomes 

 of the tubes surrounded by the ovicell are much elongated, so that 

 they are either isolated (Ascosoecia) or, as here, they are fasciculated. 

 These tubes are always open, but they may be closed by fossilization 

 or by accident. 



Affinities. — The Cretaceous species figured by Goldfuss have a 

 reticulate zoarium, and we have no knowledge of its internal struc- 

 ture. In this connection we may observe that species having a similar 

 aspect may have absolutely different relationships. 



Retepora lichenoides Goldfuss, 1827, which Gregory classed as 

 Retecava^ is a Cretaceous species quite similar not only in its exterior 

 aspect but also in the presence of dorsal vacuoles, but it differs from 

 the present form in the presence of frontal mesopores (and not 

 vacuoles). 



Crisina fm^aminosa Reuss, 1851, and Crisina cancdiculata Reuss, 

 1866, have the same exterior aspect, but we have no knowledge of 

 its structure in these sections. Our species appears to differ in its 

 more salient fascicles. 



Occurrence. — Miocene (Burdigalian) : La Combe near Mus (Gard), 

 Sauveterre (Herault), Les Angles (Gard), Franco. 



Miocene (Helvetian) : Loupian and Montagnac (Herault) and La 

 Combe near Mus (Gard), France. 



Cotypes.—Qd.rm collection and Cat. No. 68969, U.S.N.M. 



POLYASCOSOECIA LICHENOIDES GoldfoM. 1827. 



1827. Retcpora ViclienoUlcs Goldfvss, Petrefncta Gernianiae. p. 29, pi. 9, 



fig. 13. 

 1851. Idmonca lichenoides Hagenow, Die Bryozoen der ]\Iaastrichten 



Kreidebildung, p. 28, pi. 2, fig. 6. 

 1851. Coelophyma granulatum Hagenow, Die Bryozoen der Maastrichten 



Kreidebildung, p. 106, pi. 2, fig. 17. 

 1899. Retecava lichenoides Gregort, Catalogue of the Cretaceous Bryozoa 



in the British Museum, p. 194, fig. 16. 



