Nev: and Rnre Fo.ssKs. 325 



Fain. Hl'CCLMDAE. 

 (ieiius NASSA. Martini. 

 Nas.sa spirali.scai{r.\, sp. iiov. (PI. XXVIII, Fig. 31). 



Description. — Shell long — ovate, with a shar})ly pointed apex. 

 Whorls below the apex four to five* depressed, and sliglitly concave 

 in the posterior third; apex of three and a-half smooth Avhorls. 

 Surface ornament consisting of moderately thin costae, becouiing 

 beaded towards the suture. Body whorl more inflated, and spirally 

 scratched by fine grooves, which pass across the longitudinal libs; 

 the spiral grooves less conspicuous on the earlier wIkhIs. Sutu)es 

 deeply excavated; whorls tabulate. Outer lip with external mar- 

 ginal varix; internally with feeble denticulae. Columellar aiea 

 with a moderately broad callosity, anteriorly denticulate. 



Dimensions. — Height of holotype. 10. o mm. : greatest width, 

 5.25 mm. 



Affinities and Observations. — The nearest related form to the 

 above species is Nassa lahecula, Adams, i From that form it differs, 

 however, in its longer or more turreted shell and a less extent of 

 ■ callus on the inner lip, and more numerous ribs. 



N. spiraliscabra is associated with distinctive Kalimnan species 

 in the samples present. 



Distribution.— Bore 6, 114-150 feet. Bore 8, 199-204 feet. 



Fam. VOLUTIDAE. 



Genus MARGINELLA, Lamarck. 



Marginella hordeacea, Tate. 

 Marginella hordeacea. Tate. 1878, Tians. R. Soc. S. Austr., 

 vol. I., p. 91. 



Observations. — The Mallee specimens are not so broadly ovate as 

 -those from the type locality of Tate, namely, Aldinga, S. Aus- 

 tralia. Examples of the shell in the Dennant coll. (Nat. Mus.) show, 

 however, that the species varies in the same locality, but iii different 

 proportions. For instance, in the Kalimnan of Muddy Creek the 

 majority of shells are broadly ovate, and a few (n'ute ; from Aldinga. 

 of two specimens in the collection named, one is narrowly ovate, 

 the other broad; and from the (Jipjisland Lakes they are nearly all 

 Ijroad forni.s. The spire is not .so exsert as in M. proeforniicida. 



1. I'roc. Zool. Sue. Lond., 1851, p. <)S. Reeve, Conch. Icon., vol. viii., 1855, pi. n.w., figf. 166. 



9.V 



