10 MR. A. W. WATEES OlS^ 



Eschara LamarcTci, Hagenow, Biyoz. Maast. Kreide, p. 74, pi. ix. 

 %s.2,3,4. 



Vincularia geoonetrica, Ess. Bryoz. von Crosaro, p. 276, pi. xxxiii. 

 fig. 16. 



Periteichisma geometrica, Koscliinsky, Bryoz. iilt. Tert. siidl. 

 Bayerns, p. 25. 



Vincularia disjparilis, Beissel, Bryoz. Aachener Kreide; Yerh. 

 HoUandsche Maat. d. Wetenscliappen, pt. xxii. 1865, p. 15, pi. i. 

 figs. 7, 8. ^ 



Comparative measurements of the zooecia show no difference 

 between the incrusting form called angulosa, and the erect form 

 named excavata ; and Reuss (Bryoz. von Crosaro, p. 79) refers to 

 M. angulosa in the Bi-flustra-stsige. 



Prom Brendola and the other localities there are many speci- 

 mens which are at first incrusting, and then free in the geometrica- 

 form ; but the almost cylindrical M. excavata passes by gradations 

 into compressed Bijiustra-YikQ forms. The M. sexangularis, Goldf., 

 of the Maastricht Chalk is of about the same size, and at one time 

 I was inclined to unite them ; but the surface of the zocecium 

 is almost flat in sexangularis instead of depressed, and the zooecia 

 being proportionally shorter, there results a more regular hexagonal 

 appearance. 



Probably, besides the above synonyms, many others should be 

 added, as Vinculayna excavata, d'Orb. loc. cit. p. 69 ; V. santonensis, 

 d'Orb,, p. 73 ; F. lecla, d'Orb., p. 88 ; Eschara acmon, d'Orb., p. 115 ; 

 E. allica, d'Orb., p. 125 ; E. arcas^ d'Orb., p. 127 ; E. actcea, d'Orb., 

 p. 116 ; E. areihusa, d'Orb., p. 127. 



Loc. Cretaceous : Maastricht ; Royan, &c. Lower Tertiary : 

 Yal di Lonte ; Brendola ; Montecchio Maggiore ; Crosaro ; Priabona ; 

 Kovezzina ; Malo ; Oberburg ; Gaas ; Nussdorf, near Yienna {Manz.) ; 

 Gotzreuth ; "VYola Lu'zanska ; Dego ; Turin, &c. Pliocene : Italy ; 

 Sicily; Rhodes. Living: Mediterranean ; Madeira ; He de Prance; 

 Plorida (?). 



YlBEAGELLA, gCU. nOV. 



The Flustrellaria trapezoidea of Reuss is an extremelj'' interest- 

 ing form, as in respect of the zooecia it seems connected with Ony- 

 chocella ; but, instead of the vicarious avicularia, there are cells 

 scattered among the zooecia, which I should call vicarious vibracular 

 cells. The beak-like prolongation is wanting, and instead one side 

 of the vicarious cell is very much raised, indicating a vibracular 

 appendage, similar to that of Oupidaria, in which genus the one 

 side is in the same way usually " auriform." The E. trapezoidea 

 cannot, on account of these vibracula, be placed with Onychocella, 

 as at present defined ; to leave it with Memhranipora after removing 

 OnycJiocella could only be a provisional arrangement; and Flus- 

 trellaria was made to include free-growing forms of the Onychocella 

 type ; so that, although reluctant to do so, until we know more of 

 its allies, I propose the genus Vibracella for forms in which the 

 zooecia have moderately large opesial openings, and in which there 



