64 PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 



irregular fragments of shells, Balanids, etc. Inner surface of tubes smooth, 

 outer surface very rough. Length of largest fragment, 1 45 mm, diameter 

 of inner tube (without wall), 12-13 mm - 



Remarks: We may safely assume that these large and curious tubes 

 have been built by a worm, but we do not have the slightest indication as 

 to its systematic position. I place our species with the genus Terebella, 

 because this is the only fossil one known that builds its tubes by gluing 

 together fragments of shells, sand, etc. (see Zittel, 1880, p. 564). The 

 chief characteristics of these tubes are their large size and the large size of 

 the shell-fragments used for their make-up. They will be easily recog- 

 nized from the description and figure given here. 



Record of specimens : San Julian, Oven Point; 14 fragments. 



BRYOZOA. 



CHILOSTOMATA. 

 Fam. CELLARIID^E Hcks. 



Gen. CELLARIA Lamx. 

 9. CELLARIA FISTULOSA (Linnaeus). 



PI. XI, Fig. 6' 6 . 



1964 Salicornaria marginata Stoliczka, in: Novara Exp. Geol., v. i, p. 



150, pi. 20, f. 11-13. 

 1880 Cellaria fisttilosa Hincks, Hist. Brit. mar. Polyz., p. 106, pi. 13, f. 



1-4 (et synonyma). 

 1900 Cell. fist. Ortmann, in: Amer. Journ. Sci., v. 10, p. 378. 



Zoarium dichotomously branched, articulate, internodes of moderate 

 length, slender, subcylindrical. Zocecia lozenge-shaped, a little longer 

 than broad, contiguous in the same longitudinal row. Orifice arched 

 above, lower lip curved inward, subcentral (situated about in the middle 

 of the zocecium). Ovarian opening (special pore) subcircular, situated in 

 the upper part of the zocecium, in the upper angle of the rhombus. 



Remarks: I follow Hincks in the identification of this species, although 

 there is some doubt whether the fossil form described by Stoliczka from 

 New Zealand is really identical with this cosmopolitan recent species. 



