300 A. W. WATERS 0:S CHILOSTOMATOrs BRTOZOA FROM 



45. Smittia Lajstdsboeoyii, Jolmst. 



LepraliaLandsborovii, Johnst. Brit. Zooph. ed. 2, p. 310,pl.liv.fig. 9. 



The aperture of the round suboral avicularium is very small, 

 appearing as a point or a sublunate opening. The specimen is in 

 the Lepralia-form. 



Loc. Living : British seas, Mediterranean, Florida, Australia (H.), 

 Grreenland. Fossil : Eiver-Murray Cliffs. 



4Q. Smittia eeticflata, MacG. ; Waters, Quart. Joum. Geol. Soc. 

 vol. xxxviii. p. 272. 



47. Smittia seeiata, Eeuss ; "Waters, loc. cit. p. 272, pi. viii. fig. 17. 



48. Smittia Milxea^^a, Busk, var. co^qttata, nov. 



Mr. Busk described in the Crag Polyzoa a fossil as Leprdlia Ed- 

 tvardsiana (p. 44, pi. v. fig. 2), but this name he subsequently 

 changed to L. Mihuana (p. 132). The fossils from Aldinga in 

 general appearance more resemble Mucronella variolosa., but the 

 same main characters are found in both. In both the Crag and the 

 Australian fossils there is a broad oral plate extending nearly across 

 the aperture, the peristome is thickened and raised, and there is a 

 small avicularium on one side, which usually forms a peristomial 

 sinus, but sometimes in the Australian fossils it is raised and forms 

 a mucro. The avicularia are in both in about the same position, 

 but in the Aldinga specimens they are not at aU raised, and are 

 rounded at both ends with a wide mandibular openiug directed in- 

 wards. In the variety the zooecia are bordered by a thick raised 

 line, and are surrounded by a row of large pores. 



Loc. The type occurs in the Coralline Crag (B.) and in my collec- 

 tion from Leiston, Suffolk. The variety is represented by two 

 specimens, one growing on Cellepora trideiiticulata, B., and the other 

 on 2Ionoporella sexangidaris, Goldf., both from Aldinga. 



49. SCHZZOPOEELLA VTJL&AEIS, Moll. 



Escliara vulgaris, Moll, Seerinde, p. 61, pi. iii. fig. 10, A, B. 



50. SCHIZOPOEELLA SIMPLEX, Johust. Var. AXDIXGE^^SIS. 



Lepralia simplex^ Johnston, Brit. Zooph. ed. 2, p. 305, pi. liv. fig. 4. 



ScMzoporella simplex, Hincks, Brit. Mar. Polyzoa, p. 246, pi. xxxv. 

 figs. 9, 10. 



A specimen from Aldinga varies from the British species in having 

 no umbo, but we have in many species seen that the umbo is not a 

 constant character, and I have therefore thought it advisable to con- 

 sider it only as a variety. There are no avicularia, and the width of 

 the aperture is 0*13 milliTn. 



Loc. Living : British and Irish. Fossil : Scotch Glacial deposits. 



51. SCHIZOPOEELLA PHYMATOPOEA, RCUSS. 



Escliara pTiymatopora, Eeuss, Foss. Anth. & Bry. v. Crosaro, p. 272, 

 pi. xxiiii. fig. 1. 



ScMzoporella pJiymatopora, "Waters, Quart. Journ. Geol. Soc. 

 vol. xxxvii. p. 338, pi. xv. figs. 31, 32, and vol. xxxviii. p. 510. 



