88 Frederick Ckapman : 



Width of sinus band on body whorl, 1.25 mm. Length of body 

 whorl of a large specimen about 18 mm. 



Observafiotis. — The nearest form to the present species appears 

 to be Sowerby's " Pleurotoma " coralli,^ which Miss Donald has 

 placed in the genus Cyrtostropha.^ The British species ranges from 

 the Llandovery to the Ludlow series. The present species differs 

 from the British in the more numerous lirae and their slightly 

 nodulose character. Mr. Etheridge has remarked on a species of 

 Murchiso7iia (sp. ind.)' from Lilydale, which from the details given 

 seems to belong to the above form, except for there being no 

 mention of spiral lirae. 



Occurrence. — Silurian (Yeringian). In limestone. Cave Hill 

 Lilydale. Collected by the Rev. A. W. Cresswell, M.A. 



Genus Goniostropha, Oehlert. 

 Goniostropha jn-itchardi, Etheridge til. (Plate IV., Fig. 29). 



Goniostropha pritchardi, Etheridge, jnr., 1898. Rec. Aust. 

 Mus., vol. III., No. 4, p. 71, pi. XV., figs. 1-4. 



Observations. — Some examples of the above species are found in 

 the present collection. They are distinguished from Cyrtostropha 

 lilydalensis by the shorter habit and more angulate whorls; the 

 lirate ornament in both forms is very similar, but the sinus band 

 in C. lilydalensis is not so deeply excavate. 



Occurrence. — Silurian (Yeringian). In limestone, Cave Hill, 

 Lilydale. Collected by the Rev. A. W. Cresswell, M.A. 



Genus Gyrodoma, R. Etheridge, jnr. 

 Gyrodoma etheridyei, Cresswell sp. 



Eunema etheridgei, Cresswell. 1893. Proc. R. Soc. Vict., vol. 

 V. (N.S.), p. 41, pi. VIII., fig. 2. 



Gyrodoma etheridgei, Cresswell sp., R. Etheridge, jnr., 1898. 

 Rec. Aust. Mus., vol. III., No. 4, p. 72, pi. XVI., fig. 1. 



Observations. — Mr. Etheridge has referred, in the paper above 

 cited, to the question raised by Mr. Cresswell's depiction of the 

 type specimen as having a double band. An examination of the 

 type, which is in the National Museum collection, shows the band 

 to be single, rather depressed, and marked along the middle with 

 a raised spiral thread; hence the slight mistake in the details of 



1 J. C. Sowerby. Sil. Syst., 1839, p. 612, pi. v., fig. 26. 



2 Quart. Journ. Geol. Soc, vol. Iviii., 1902, p. 322, pi. vii., figs. 5, 6. 



3 Rec. Auttr. Mu8., vol. i., No. 7, 1891, p. 129. 



