REPORT ON THE POLTZOA. 41 



(intra-tentakulare Leibeswand, Nitsche), through which passes ou one side the 

 oesophagus and on the other the rectum. 



3. All the Pedicellinidse are furnished with a more or less mobile stem, which is 

 either flexible and contractile throughout, or as in Pedicellina gracilis, partially flexible 

 and partially rigid, or as in Ascopodaria, whoUy rigid and chitinous, its motions 

 being eS"ected by a peculiar muscular apparatus at the lower end. 



The only forms belonging to this Family that I have noticed in the Challenger 

 collection belong to an apparently distinct genus, to which in 1878 I had given the 

 MS. name of "Ascopodaria," as stated in Professor Allman's Linnsean address of 1879. 

 In 1880, however, Mr. Hincks, in a description of some Arctic Polyzoa, described and 

 figured under the name of Barentsia bulbosa, a pedicelline species, which, though 

 apparently quite distinct specifically from either of the two Challenger forms, evidently 

 belongs to the genus I had already proposed to establish. In strict right of priority of 

 publication, therefore, his name should have precedence over that merely provisionally 

 given by me, and I should without hesitation have adopted it, but since then he has 

 described and figured a second species, referable, from my point of view, to the same 

 genus, under the name of Pedicellinopsis fruticosa,^ thus giving two distinct names to 

 the same generic type. I have, therefore, felt justified in retaining my original 

 appellation, and in regarding Barentsia and Pedicellinopsis as synonyms. As an 

 additional argument, though one of less weight, in favour of the course I have pursued, 

 I might cite the appropriateness of the title I chose, indicative as it is of the main 

 peculiarity of the genus. 



The Family here contains : — 



1. Ascopodaria. 



(1) Ascopodaria fruticosa, Hincks, sp. (Pis. IX., X. figs. 1-5). 



(2) Ascopodaria discreta, n. sp. (PI. X. figs. 6-12). 



1. Ascopodaria, Busk.'' 



Ascopodaria, Bk. (MS.), Add. by Prof. Allman, Journ. Linn. Soc. Lond. (Zool.), vol. xv. p. 2. 

 Barentsia, Hincks, Ann. and Mag. Nat. Hist., ser. 5, vol. vi. p. 285 ; Vigelius, Bijd. Dierk. Genoot. 



Nat. Art. Mag. Amsterdam, II. Aflov., pt. 2, p. 85. 

 Pedicellinopsis, Hincks, loc. cit., vol. xiii. p. 363. 

 Pedicellina (pars), Sars, Leidy. 



CJiaracter. — Polypide budding from and supported at the extremity of a chitinous, 



tubular, perforated stem, which expands below into a cylindrical, barrel-shaped dilatation, 



lined internally by a layer of longitudinal muscular tissue. 



1 This species is the same as one of the two Challenger forms to which 1 had yiven the name of Atcopodaria socialU, 

 but I have now as a matter of course adopted Mr. Hincks specific name. 

 i, I ' From oJffKo'f, a wine-skin, xoi/,-, a foot, an illusion to the dilatation at the base of the stem. 



ZOOL. OHALL. EXP. — PART L. — 1886.) I'dd 6 



