BRITISH PAL^OGENE BRTOZOA. 247 



Species 2. Adeonellopsis incisa, u. sp. 

 Syn. Microporella violacea, var. fissa, var. a, Vine, 1889, Proc. Yorks. Geol. & Polyt. Soc. xi. 

 p. 162, pi. V. figs. 7,7 a. 



Diagnosis. Zoarium erect, bilaminar, and forming thick, short, subcylindrical shoots. 



Zooecia elongate, lanceolate, quincuncially arranged. The orifice is oval or suborbi- 

 cular ; it opens on the sloping upper surface of the high tumid head, which also bears 

 a large peristomial pore. A pair of large avicularia occur immediately below the 

 orifice. The zooecia are sharply defined by lines of depression marked by rows of 

 areolae. The trypa is a median narrow slit. 



Gonoecia . 



Distribution. London Clay : Haverstock Hill {% Bracklesham Beds, fide Vine). 



Type. Brit. Mus. No. 49661. 



Ficjure. PL XXX. fig. 11. Part of Mr. Vine's type. 



Affinities. This species in its slit-like trypa closely resembles Adeonellopsis perforata 

 (Reuss) [Eschara perforata, Eeuss, No. ii, p. 231, pi. xxxiii. fig. 5], but the latter 

 has no peristomial pore. It differs from A. ivetherelli, Greg., by the pair of avicularia 

 forming a peristomial pore, instead of having one median avicularium ; the trypa is 

 also different. The specimen figured by Reuss [No. 7, pi. xi. fig. 6J as Eschara diplo 

 stoma, Phil., also belongs to this genus, but differs in the form of the trypa and of the 

 orifice. The two other forms (figs. 5 and 7) associated with it by Eeuss seem different, 

 and that represented in fig. 7 is probably a second species of Schismoporella. 



Sutorder HOLOTHYRIATA. 



Family LEPRALIIDiE. 



Subfamily Lepkaliin^. 

 Genus Lepkalia, Hincks, 1880 (non Johnst. «&c.). 

 Diagnosis. Hincks, No. 2, p. 297. 



Species 1. Lepralia lonsdalei. 

 Syn. Eschara brongniarti, pars, Lonsdale (non M.-Edw.), 1850, Dixon, Geol. Suss. pp. 161, 163, 

 pi. i. fig. 9*. 



Diagnosis. Zoarium thick, encrusting. 



Zowcia small, ovate; very irregularly distributed. Form irregular, varying from 

 somewhat elongate to short and round. Aperture lepralian, very large : lower margin 

 straio-ht or curved outwards ; the lateral constriction is, however, very slight. Surface 



