Dr. F. A. Bather — Tube-building Fossil Annelides. 553 



described. They were studied and classified in 1897 by Professor 

 A. Kothpletz in his valuable paper " TJeber die Flysch-Fucoiden und 

 einige andere fossile Algen" (Zeitschr. deutsch. Geol. (resell., 

 vol. xlviii, pp. 854-914, pis. xxii-xxiv). More recently Dr. Otto M. 

 Eeis (January, 1910, " Zur Fucoidenfrage," Jahrb. k.k. Geol. 

 Reichsanst., lix, pp. 615-38, pi. xvii) has attempted, and I think 

 with much success, to prove tbat a number of these Flysch 'fucoids' 

 are the tubes of Terebelloid Tubicola. He seems to regard most of 

 them as having been built up of clay in the same way as the tube of 

 the living Terebella flgulus. If such genera as Granularia, Squamularia, 

 and Keckia are really based on tubes with a wall capable of being 

 explained in this way, then our specimens are not referable to any of 

 those genera. 



For the present the British Museum does not possess enough 

 examples of the numerous strange forms so ably discussed by 

 Kothpletz, Th. Fuchs, 0. Eeis, and others 1 for any comparison to be 

 made, or for any understanding of the many generic names that have 

 been proposed. To those names I have no intention of adding 

 another. 



It has, however, been urged that, for convenience of reference, 

 some name is required for these tubes. Since they have been called 

 'Terebella'', they may continue to be so called, strictly without 

 prejudice, and may be distinguished as 



' Terebella' cancellata, n.sp. (PL XXIV, Figs. 3-5.) 



Diagnosis. — Tube from which the (? gelatinous or mucinous) wall 

 has disappeared, leaving on the internal cast an obscure cancellate 

 ornament formed by transverse and longitudinal folds ; with diameter 

 from about "75 to 2 cm., and with a possible length of 19 cm. or more. 



Horizon. — Cenomanian, so far as recorded. 



Locality. — East and South -East England generally, so far as recorded. 



Holotype.—BM. 58253, from Glynde, Sussex (Fig. 3). 



It will be observed that I definitely exclude the Upper Green sand 

 specimen A 1638, which may be known for the present as ' Terebella ' 

 cf. cancellata. 



Tubes made of Mtjd Bricks. 

 Jieckia(?) sp. (PI. XXIY, Fig. 1.) 



Associated in the national collection with the series of Terebella 

 lewesiensis is another tube labelled "Terebella?, Chalk. Mantell 

 Colin. [4784.]". This is in a greyish, slightly rust-stained chalk, 

 doubtless of Lower Cenomanian age, from South-East England. 

 The specimen is unlike any other in the Museum. 



The tube is 7'2 cm. long, slightly flexuous, with a diameter of 

 about 65 mm. It appears to have had a distinct wall (now in part 

 broken away) composed of bricks or tiles fashioned from the chalk 

 ooze and laid in a series of imbricating whorls. A spiral arrangement 

 of the Avhorls is not to be detected, but each appears to have passed 



1 See references in my note " Some Fossil Annelid Burrows ", Geol. Mag., 

 March, 1910, pp. 114-16. 



