OF THE SELENARIADJ?, CONESCHARELLINID/E, ETC. 417 



Selenaria maculata, Busk. (PI. 29. fig. 8 ; PI. 30. figs. 13-15.) 



For synonyms see Miss Jelly's Catalogue and add : MacGillivray, Teit. Poly. Victoria," 

 p. 47, pi. 7. figs. 5, 0, 7 (1895). 



As mentioned in my Supp. Rep. Zool. Cball. p. 38, there are spreading 

 round the oral aperture, and ending soineuhat lower than the operculum, 

 trabeculse in the frontal membrane, reminding us of the trabeculse described 

 by Busk in Cellaria, and which also occur in Onychocella angulosa, Rss. 

 Busk says that the trabeculse " appear to lie beneath the common epitheca 

 and not to form mere thickenings of it." Where 1 have examined them 

 they seem to form part of the membrane. In Onycliocella angulosa the ends 

 are raised and thicker, and seem to be for the attachment of the muscles to 

 the membrane. The different shapes of the trabeculse seem to give useful 

 characters wherever they occur. The vibracular sefse are spinous on the one 

 side (fig. 13). 



Loc. Holborn Island, Queensland ; Barnard Island, N.E. Australia, 

 10 rath. 



Fossil. Muddy Creek, Bird Rock, Schnnpper Point, Belmont, and Cape 

 Bullenmerri (Victoria) ; River Murray ('litis, S. Australia. 



Ltjnulites cupulus, Busk. (PI. 30. fig. 10.) 



LunuUtes cupulus, Dusk, Voyage of the ' Rattlesnake,' p. 1, pi. 1. figs. 13, 14 (1852) ; 

 B.M. Cat. p. 100, pi. 112. tigs. 1-6 (1854). 



Lunuliles gibbosa, Busk, B.M. Cat. p. 100, pi. 111. figs. 1-6 (1854). 



-Judging from the chamber the appendage is apparently avicularian, 

 that is to say it has movement in one direction only, but without seeing 

 spirit specimens it is best not to speak too definitely. The mandible or 

 seta is long and large, gradually diminishing to the apes (fig. 1(3), and 

 near the apex a small branch grows from the side. The figure is taken from 

 a preparation in the British Museum, made by Busk, and only labelled "hairs 

 of LunuUtes," but comparison with the type-specimen shows that it is 

 certainly from L. cupulus, B. 



This is clearly allied to LunuUtes repandus*, Maplestone, and L. patelli- 

 fomnis'X, Mapl. (non Marsson), but without examining specimens it is not 

 advisable to say more. The fossil L. patelUformis, Marsson J (non Mapl.) 

 and L. semilunaris, Marss.§, seem also to belong to this group. 



Busk changed the name LunuUtes to Lunularia, a change which has not 



* " Victorian Selenariidse," vol. xvi. n.s. p. 210, pi. 25. tig. 7 (1904). 

 t " Vict. foss. Selenar." p. 215, pi. 25. fig. G. 



X "Bry. Weiss. Schreibkreide des Insel Riigen," Pal. Abb. vol. iv. p. 79, pi. 7. fig. 11 

 (1887). 



§ Loc. cit. p. 78, pi. 7. fig. 10. 



