Victorian Fossils. 13« 



of the world. From E. morning tonensis, Tate,22 it differs in its greater- 

 width and depressed spire, whilst the outer lip is smooth, unlike 

 that of E. morningtonensis^ which is crenulated, and with the inner 

 lip plaited. In its tumid form, E. pyrulata, Tate, approaches the- 

 present species, but differs in having a crenulated lip, and more 

 exsert spire. 



Occurrence. — In the blue clay of Balcombe Bay, Mornington.- 

 Found and presented by Mr. J. H. Gatliff. Baicombian (Oligocene). 



Fam. MURICIDAE. 



Genus Murex, Linne. 



Sub-genus Muricidea, Swainson. 



Murex (Muricidea) gatliffi, sp. nov. (Plate III., Fig. 19.) 



Description. — Shell of medium size, turrited, and with a short canaL 

 Spire elevated, apical angle 36°, longer than the body whorl, con- 

 sisting of six turns besides the protoconch. Suture deeply impressed, 

 whorls rounded, subangulate below the middle, with costate varices 

 often becoming lamellose or scaly, about 10 on body whorl. Costae 

 crossed by fine rounded spiral threads, about 10 on the penultimate 

 whorl, and 26 on the body whorl with even finer intermediate ones; 

 one on the angulation much thicker and prominent. The entire sur- 

 face crossed with fine varicial lines passing over the spiral and coarser 

 threads. Aperture roundly pyriform, with a nearly straight canal. 

 Inner lip having a thin callus and a single columellar fold about 

 midway in the aperture; outer lip thin, smooth. Protoconch small, 

 consisting of one and a half turns, the initial portion obtuse. 



Dimensions. — Height, 26 mm.; length of body whorl, to end of 

 canal, 16 mm.; width of body whorl, 14 mm.; greatest width of aper- 

 ture from inner lip, 7 mm. 



Observations. — The above species is not unlike some living 

 Trophons in general outline, 24 but the tendency to form lamellose 

 varices and its decided affinity both to Murex asperulus, Tate,25 

 and M. camplytropis, Tate, 26 makes its generic position clear. From 

 both the forms mentioned, M. gatliffi differs in the greater number of 

 costae and in the shape of the protoconch; whilst M. asperulus has a. 

 larger and more twisted canal and less extended spire. M. camply- 

 tropis differs in having a heavier shell, denticulate outer lip and. 

 pseudo-umbilicus. 



Occurrence. — In the blue clay of Balcombe Bay, Mornington. Bal- 



22. Ibid., vk)l xiii., 1890, p. 217. 



23. Ibid., vol. xiii., p. 216, pi. xiii., fig. 12. 



24. In making comparisons with living genera and species, I have- 

 been materially assisted by Mr. C J. Gabriel, to whom by best thanks are- 

 due. 



25. Trans. R. ?oc. S. Australia, vol. x., 1888, p. 106, pi. iii., fig. 1. 



26. Ibid., p. 106, pl.ili., fig. 2. 



