A REVISION OF THE AUSTRALIAN TURRID#®—HEDLEY. 307 
Reeve. Thus was indicated a group, related to Hucitharu, of elongate, 
many whorled shells, uniform brown or white in colour, the mouth con- 
tracted by a sharp free lip springing from a prominent varix, within 
which are some entering ridges, and above these a well-cut sinus. 
Sculpture :—Prominent and continuous longitudinal ribs, crossed by fine, 
and sometimes coarse, spiral grained threads. 
Some West American species which have been referred to Agathotoma 
Cossmann ®? by Dr. Dall® have much resemblance to Pseudorhaphitoma. 
Misapprehension about the type of the genus seems to be general, for 
I have received from correspondents two different species under the name 
of M. fuirbanki, neither of which agrees with Nevill’s figure. So to re- 
establish this genus I applied to the Director of the Zoological Survey of 
India for a loan of Neyill’s type. This he most generously placed at my 
disposal, and the opportunity is now taken to re-describe and to re-figure 
it. Thus :— 
PspuUDORHAPHITOMA FAIRBANKI Nevill. 
(Plate li., figs. 127, 128, 129.) 
Shell narrowly conical, solid. Colour uniform cinnamon-drab, except 
the first two whorls which are hyaline white. Whorls eight, evadually 
increasing. Seulpture:—The second whorl has a nepionic sculpture of 
numerous fine radial riblets; the remainder of the shell is traversed by 
six prominent stout spaced radial ribs, which ascend the spire vertically 
and without interruption. These are crossed by fine and coarse spirals; 
the major spirals are ten on the last whorl, four on the penultimate, and 
three on the previous whorls; they form polished beads on the crests of 
the ribs; between each major spiral run six to eight microscopically- 
beaded threads. Behind the aperture the suture first ascends slightly, 
then descends abruptly. The final rib, more massive than its fellows, 
forms a varix in which is excavated a semicircular sinus, and from which 
an inbent lip contracts the mouth. Within the outer lip are four denticules, 
and on the inner lip is a raised callus pad. Canal short and broad, Length 
6-2 mm., breadth 2°3 mm. 
Hab. India :—Bombay. 
PSEUDORHAPHITOMA ALTICOSTATA Sowerby. 
(Plate h., fig. 130.) 
Mangilia ulticostata Sowerby, Proc. Malac. Soc., ii., 1896, p. 31, pl. iii., 
fig. 16. Id. Hedley, Proc. Linn. Soc. N.S.W., xxvi., 1901, p. 17. 
Id. Verco, Trans. Roy. Soc. 8.A., xxxiii., 1909, p. 313. Id. Melvill, 
Proc. Malac. Soc., xii., 1917, p. 167. 
Hab. South Australia :—12 to 15 fathoms, St. Vincents Gulf (type); 
40 fathoms, Neptune Island (the shell here apy 44 fathoms, eee 
82 Gouna Crit. Pal., iii., 1889, p. 1, new name for Ditomua neha ardi, frie 
Mangilia anqusta Jan. 
83 Dall—Proc. U.S. Nat. Mus., lvi., 1920, p. 79. 
