iXew iintl. Hare Fijssi/s. ]S'i 



tlu' oritur, till' t'd^f lit' wliicli is tliiii and sliari». Surface smooth, 

 l)ut I'm- iiHlistinct iiii<;s of Lirowtli. Otxasioiially these rings 

 are vciv tiiii'k. and rust-nihk' toUars.l lAMif^tlis of two typical 

 exaiiipk's. 8 nnii. and !>..") nun., respectively; hreadths. 1.5 mm. and 

 1.5 mm. at the apical end. 



Ohsrrrttf/n/is. — The type species has been described under many 

 names. 2 As a fossil it raniies in Eui-o))e from the Middle Eocene to 

 the Pleistocene, and is also found livinir. 



The present variety is more re<;ulaily tai)ei'iny' than Brocchi's 

 " iJciitdli mil " coarcfaf iiiii.'^ It is close)' to Sowerby's " ])ent(t- 

 Iniiii " iiKTfUisdt uni.^ from which it dift'ers in its more irregular 

 surfai-e and generally smaller size. The latter species is synony- 

 mous wirh DitniiKi roriKC. 



The original specimen refi'ired to by .McCoy, from the Janjukian- 

 ironstone of Stawell, N'ictoria. is merely a mould, and the figure 

 given in the Progi-ess llejxnt (loc. supra cit.) hardly coincides Avith 

 a s(|ueeze which I have taken fi'om the type specimen, and now 

 figured (see ]il. xviii.. tig. 2()). Since McCoy connects this specimen 

 with thost' from Wormbete Creek, Barwon Valley, there leaves no 

 room for doul)r as to its identity. This vaiiety is, so far as 

 known, (|uite I'estricted to the Janjukian series in Victoria. 



Orcirreiirc.—Woyv :;. 2ol-22() feet; 22G feet. Bore 4. 16:M70 

 feet; 180-]!)U feet. Bore 5, 16:5-175 feet; 175-189 feet; 189-190 

 feet. Bore G. 150-15-1: feet; 158-161 feet. Bore 9, 315-325 feet. 

 Bore 10, 254-296 feet; 310-320 feet. Bore 11. 272-315 feet; 331- 

 342 feet; 342-349 feet; 353-370 feet; 448-450 feet. 



Drrni PA. cornea. L. sp., var. constkicia, var. nov. (Plate XVIII. 

 Fig.s. 29, 30). 



Dfscriiifinii . — Tubi- tapering, only slightly curved, broken up 

 into nodosities by constrictions at intervals along the tube. The 

 nodose swellings aie generally found at or towards the apical end, 

 tlius showing the varii'tal character to be ])artly attributable to 

 senility. Tulic larger and stouter than in v.w. ironnbefiefisis. 



Orriirnnrr. — linro 1. 215-244 feet. Bore 3, 226 feet. Bore 4. 

 163-17(» feet: lS()-]!)() fivt. Bore 5. 163-175 feet. Bore 10. 310- 

 320 feet. 



1. Ill this c^ur.aoter it icseiiiblcs Dilnijin xtvdnyiilatit, Desliiiv es. Sec- Mono;;iapliie, 1S2G, p. 372, 

 pi. xvi., fi^'. 28. Al.so Rovereto, |>al. Ital., vol iv. 1898, p. 73, pi. vii. (ii.), fi<,'. 1.5, \bae. This specie* 

 or variety is recorded living- from the Mediterranean, Southern Ocean, and Atlantic. 



2. See Kovereto, G. l'ala;ontojjcrai)hia ttalica, vol. iv., 1898. p. 71 : and vol x., 19(i4, p. 29. 

 :i. Conch iolOjLria, vol. ii., pi. i, fis,'. 4. 



4. Min. Conch.. \o\. i.. 1M2. pi. Iwix., fi>,'.s. 3, 4. 



