from the Persian Gulf, &c. 5 



Of the same dimensions as the last species just described, 

 but there are no traces of varices ; the characters, likewise, of 

 the lamella? are different, these being clearly cut, smooth, and 

 thicker than in the fellow species. The spiral stria? are also 

 much more fine and delicate. 



There seems now no hope that the names Scalaria or 

 Scala, which have graced this genus with such aptitude 

 during so many years, can be preserved, unless, indeed, some 

 of the more inexorable decrees of the law of priority be 

 removed. Since Bolten's names are to be recognized, it will 

 be well to ask why he called the " Wentletraps " by the 

 harsh-sounding Epitonium. The name might be worse 

 however : it is pure Greek, ifrnovLov signifying the '' key by 

 which the strings of an instrument are tightened to tune it u ; 

 presumably, therefore, the chord-like close longitudinal 

 lamella?, tightly packed over the whorls, suggested it. 



Crosseia alliciens *, sp. n. (PI. I. fig. 7.) 



C. testa minima, anguste umbilicata, rotundo-conica, pellucida, 

 albo-vitrea, nitida, tenuissima ; anfractibus 4, apicali parvo, 

 costeris apud suturas impressis, ventricosulis, laevissimis, ultimo 

 globoso, circa umbilicum concentrice fortiter exsculpto et margi- 

 nato, nmbilico ipso parvo ; apertura ovato-rotunda, peristomate 

 tenui, collumella excavatula. 



Alt. l - 75, diam. 1-30 mm. 



Hab. Gulf of Oman, lat. 24° 58' N., long. 56° 54' E., 

 156 fathoms, shell-sand. 



Very minute and papyraceous; perhaps, indeed, not quite 

 adult, but the distinguishing features of the species are all 

 present — the umbilicar ridge, for instance, is strongly built 

 and conspicuous. The umbilicus itself is small and narrow ; 

 whorls four, ventricose. Substance of shell glassy, thin, 

 quite smooth throughout, and polished. The only other 

 species yet known from the same seas is C. eryma, Melv. f 

 This, though equally small, is a stouter shell, solid, and 

 spirally closely striate throughout. But few possess no sculp- 

 ture ; such, however, is the case with C. naticoides, Hedley \, 

 and one or two other Australian species, including also 

 C. glabella, Murdoch §, from New Zealand, and carinata, 

 Hedley ||, from Port Kemble (' Thetis' Expedition), a very 

 minute species, alt. T7, diam. 1'46 mm., with a blunt peri- 

 pheral keel. 



* Alliciens, alluring. 



t Proc. Mai. Soc. Lond. vii. (1006) p. 70, pi. vii. fig. 7. 



X Kec. Australian Mus. vi, (1907) p. 290, pi. liv. figs. 6, 7. 



§ Trans. N.Z. Inst, xxxvii. (1905) p. 225, pi. viii. figs. 16, 17. 



|| Mem. Austral. Mus. iv. p. 345, tig. 71 (1903). 



