4 MAZATIAN BRYOZOA 



6. Lepealia eosthata, Busk, (n. s.) 



CelluUs immers'is, superjic'ie tuhercnlatCi sen granulata ; ore 

 immerso, marghie superlorl inconspicuo ; margiiie iiiferion pro- 

 funde sulcata ; aviculario magno, sessili, armato. 



The lower or interior mar§rin of the mouth in the fully formed 

 cells, is deeply gi-ooved in the middle ; and on one side of the 

 sulcus is a strong, short, blimt, spinous pi'ocess ; on the other 

 a comparatively large raised ariculariima, -nhich faces towards 

 the sidcus, and whose mandible is acute and points upwards 

 and outwards. The surface of the cell is often beset with short 

 raised spines or processes ; and these, projecting over the mouth 

 of the cell below, give it the appearance of being furnished with 

 several oral spines. 



Hab. — Mazatlan ; on Imperator xmguis ; I! pool Col. 



Tablet 8 contains a group on Imperator. — 9, one on base of do. 



7. Lepealia mabginipoea, Heiiss. 



Fossil Tolyp. d. Wiener Tertiar. Beck. p. 88, pi. 10, fig. 23. 



Celhdis ovafis, convexis sen suhdeprcssis, immersis, aspeimlis, 

 margine punctatis ; ore rotunda sen suheUiptivo ; margine sub- 

 incrassato, singulo latere avicularium gerente. 



As the foiTU appears precisely to resemble the tertiary species 

 described and figured by Eeuss, I have applied his name, and 

 in great part employed his character. 

 Hab. — Mazatlan ; on Imperator unguis ; JJpool Col. — Fossil, 



Vienna. 



Tablets 10 contains a gi-oup ou Imperator. 



8. Lepealia hippoceepis, Busk, (n. s.) 



CelluUs immersis, superficie punctatis; ore suborbiculari seu 

 eUiptico ; margine superiori celhdarum vatn majorum, inconspi- 

 cuo, inferiori et laterali incrassato utrinque avicularium gerente. 



The peculiarly horse-shoe shaped mouth of the older cells, 

 sufficiently distingxiishes the present from the preceding species, 

 to which, in the moiith alone of the yoimgor cells, it bears some 

 resemblance. 



Hah. — Mazatlan ; on Imperator olivaceus : L'pool CoL 

 Tablet 11 contains a group on Impetator. 



