(317) W. Repiachoff. "Zur Naturgeschichte d. chilostomen Seebryozoen." _Zeit. f. wiss. Zool._, Bd. XXVI. 1876. (318) W. Repiachoff. "Ueber die ersten Entwicklungsvorgänge bei Tendra zostericola." _Zeit. f. wiss. Zool._, Bd. XXX. 1878. Supplement. (319) W. Repiachoff. "Zur Kenntniss der Bryozoen." _Zoologischer Anzeiger_, No. 10, Vol. I. 1878. (320) W. Repiachoff. "Bemerkungen üb. Cyphonautes." _Zoologischer Anzeiger_, Vol. II. 1879. (321) M. Salensky. "Untersuchung an Seebryozoen." _Zeit. für wiss. Zool._, Bd. XXIV. 1874. (322) A. Schneider. "Die Entwicklung u. syst. Stellung d. Bryozoen u. Gephyreen." _Archiv f. mikr. Anat._, Vol. V. 1869. (323) Smitt. "Om Hafsbryozoernas utveckling och fettkroppar." _Aftryck ur öfvers. af Kong. Vet. Akad. Förh._ Stockholm, 1865. (324) T. Hincks. _British Marine and Polyzoa._ Van Voorst, 1880. [Conf. also works by Farre, Hincks, Van Beneden, Dalyell, Nordmann.] CHAPTER XI. BRACHIOPODA[128]. [128] The classification of the Brachiopoda adopted in the present chapter is shewn in the subjoined table: I. Articulata. { _a._ Rhynchonellidæ. { _b._ Terebratulidæ. { _a._ Lingulidæ. II. Inarticulata. { _b._ Craniadæ. { _c._ Discinidæ. The observations which have been made on the developmental history of the Brachiopoda have thrown very considerable light on the systematic position of this somewhat isolated group. _Development of the Layers._ For our knowledge of the early stages in the development of the Brachiopoda we are almost entirely indebted to Kowalevsky[129] (No. 326). His researches extend to four forms, Argiope, Terebratula, Terebratulina, and Thecidium. The early development of the first three of these takes place on one plan, and that of Thecidium on a second plan. [129] Kowalevsky's Memoir is unfortunately written in Russian. The account in the text is derived from an inspection of his figures, and from an abstract in Hoffmann and Schwalbe's _Jahresberichte_ for 1873.