APPENDIX—-MOLLUSCA. 555 
heavy varix, crenulated by the spiral sculpture. Major diameter 
‘84, minor ‘66; height *84 mm. 
Dredged off Tutaga Islet at a depth of 200 fathoms, and off 
Beacon Islet (Funamanu) at 150 fathoms. 
This, the smallest known Liotia, is well distinguished by its 
simple and massive sculpture. 
MECOLIOTIA, gen. nov. 
A genus of the Liotiide, distinguished from Liotia by an 
elevated spire of six whorls, an obliquely truncate base and granose 
sculpture. 
The type species appears to me to be co-generic with Iphitus 
tuberculatus, Watson.* The genus Jphitus was founded by 
Jeffreys on a single immature specimen,} and is known from 
Watson’s rather than from Jeffreys’ account. Jeffreys placed the 
genus in the Littorinide and Fisher in the Fossaride. My species 
cannot enter either of these families, nor, I should think, could JZ. 
tuberculatus. We are however, relieved from the unsatisfactory 
genus of Jeffreys by the fact that Jphitus is preocupied in 
Mollusca by Ratinesque.{ In Hemiptera Stal introduced [phita 
in 1870.§ 
Type, Mecoliotia halligant. 
MECOLIOTIA HALLIGANI, sp. n0v. 
(Fig. 68.) 
Shell small, most massive, conical, = 
with obliquely truncate base, narrowly 
perforate. Colour white. Whorls six 
of which two are apical, separated by 
deeply impressed sutures. Sculpture— 
the third has one, the fourth and fifth 
each two, and the last whorl three, 
prominent, heavy, spiral keels. These 
are overridden and knotted by longi- 
tudinal ribs, which on the last whorl 
number seventeen, cross from umbilicus 
to suture, and mount the upper whorls 
perpendicularly and continuously. Deep Fie 
square pits are enclosed by the inter- 
section of this sculpture. The first whorl is rounded, the second 
keeled. The base is hollow beneath the periphery, with a central 
* Watson—Chall. Rep., Zool., xv., 1886, p. 583, pl. xlvi., fig. 5. 
+ Jeffreys-—Proc. Zool. Soc., 1888, p. 118, pl. xx., fig. 12. 
+ Rafinesque—Anal. Nat., 1815, p. 141. 
§ Stal—Sv. Ak. Handl., 1870, p. 99. 
