A REVISION ORF THE AUSTRALIAN TURRID#®—HEDLEY. 305 
PARACLATHURELLA Boettger. 
Paraclathurella Boettger, Nachr. Malak. Gesell., xxvii., 1895, p. 56, type 
Pleurotoma gracilentu Reeve. 
In Paracluthurella Dr. Boettger established a valid genus for P. 
gracilentu and its varieties, but his classification appears to have depended 
on superficial characters of subeylindrical form and delicate sculpture in 
which spirals exceed radials, for his judgment was depreciated by the 
addition of the following incongruous species—P. uxis Reeve, eximia Reeve, 
insculpta Adams and Angas, lirata Reeve, rissoides Reeve, and subula 
Reeve—here distributed among Hemidaphne and Guraleus. 
Paraclathurella has the first two whorls (protoconch) depressed- 
turbinate, quite smooth, the initial one a little tilted. Sculpture commences 
with the advent of four minutely-beaded spirals. Radials follow, develop 
a reticulation, become wider spaced, and gradually predominate, thus 
introducing the adult sculpture. A secondary microscopic sculpture later 
occurs of grained threads. Varix narrow, in which is excavated a squarely 
U-shaped sinus; outer lip with a narrow free edge; no teeth on columella 
or lip. 
These characters I read as indicating a relationship with Hucithara; 
from that Paraclathwrella is distinguished by elongate form, radial sculp- 
ture, and toothless mouth. 
PARACLATHURELLA ADITICOLA sp. nov. 
(Plate li., fig. 125.) 
Shell of moderate size for the genus, cylindro-fusiform. Whorls 
seven. Colour uniform buff. Seulpture:—Radials consist of distant, low, 
round-backed ribs, discontinuous from whorl to whorl, undulating the 
suture, and set about eight to a whorl; on the upper whorls the ribs are 
comparatively closer and higher; on the last whorl are about twenty fine 
grooves, cutting the surface into flat-topped spirals; on the peuultimate 
there are about ten of these. Aperture :—The month is elongate-pyriform, 
withont teeth on either side; no varix; outer lip thin, and scarcely 
inflected at the sinus; canal a notch. Length 8 mm., breadth 2-5 mm. 
Compared with P. gracilentu var. portii Smith, the shape of the 
novelty is more fusiform, and the whorls increase slower, the spirals 
smaller and more numerous, but the radials are fewer aud more prominent. 
Hab. Queensland :—4 to 14 fathoms, Albany Passage (type); Mapoon 
(self). 
PARACLATHURELLA CLOLHONIS sp. Wov. 
(Plate li., fig. 126.) 
Shell small, slender, cylindro-fusiform. Colour uniform dull grey. 
Whor!ls six, of which half comprise the protoconch, the first two whorls of 
which are smooth, the next sculptured with radial arcuate wrinkles. 
