A REVISION OK THK AUSTIv'AI.IAN inKIUD.t; HKHr.FY. 311 



PsEDnORHAHllITOMA STYRACINA xp. UOV. 



(Plate Hi., fig. 136.) 



Shell solid, subulate. Whorls ten. Colour uniform grey. Sculpture: — 

 Ribs low and broad, with iiairow interstices, six on the last whorl ; 

 spirals are sharp threads running evenly over both libs and fuiTows, and 

 increasing by intercalation ; on tiie pennitiinate are tour spii'ais, and on 

 the last whorl foni'teen, some of which are alternately large and small. 

 Aperture: — Sinus U-shaped, rather wide and deep; columella simj)le ; 

 outer lip a thin bent edge; throat grooved within. Length 10 mm., 

 breadth 3 mm. 



This has a geneial likeness to Pleurotoma fortiUratu Smith,^* but has 

 the base less excavate, the spirals more numerous, and the ladials fewer 

 and bolder. 



Hah. Queensland : — 4 to 14 fathoms, Albany Passage (type) ; off 

 Horsey River (self) ; 10 fathoms. Cape Sidmouth (Henn). There are 

 unrecorded specimens of this in the " Chevert " collection from ofE Cape 

 York and Katow. 



PSEDDORHAPHITOMA TKANSITANS sp. UOV. 



(Plate Hi., fig. 137.) 



Shell small, solid, biconical. Colour uniform pale buff. Whorls seven. 

 Protoconch of two small smooth helicoid whorls. Sculpture : — First adult 

 whorl with numerous small radial riblets ; on subsequent whorls the ribs are 

 spaced seven to a whorl ; they are continuous, perpendicular, and elevated ; 

 the spirals are prominent cords which project at the intersection of the 

 ribs, two on the upper whorls and twelve on the last one, evenly distributed 

 from the shoulder to the anterior extremity. Aperture: — Mouth narrow ; 

 varix broad and high, of the same calibre as the ribs ; sinus small and 

 shallow ; within the aperture is a small denticule at each side of the sinus, 

 and a small deeply-seated fold on the columella ; canal shoit and wide. 

 Length 4 mm., breadth 1-5 mm. 



In general appearance, by short stature and conspicuous spirals, this 

 form recedes from typical PHeadorluiphltomd towards Heterocithara. 



Hah. Queensland: — 15 fathoms, Palm Islands (self). 



(i UEALEDS HedJeij. 



Garalens Hedley, Journ. Roy. Soc. N.S.W., li., 1918, suppl. p. M. 79, 

 type Mangella jiicta Adams and Angas. 



Shell fusiform or subcylindrical, thin. Colour ranging from uniform 

 buff, with or without chocolate spiial lines or bands, to entire chocolate. 

 Nucleus of two or three smooth helicoid whorls. Fasciole not interrupting 

 the sculpture, and scarcely indicated by the curvature of growth lines. 



>** Smith— Proc. Zool. Soc, 1879, p. 194, pi. xix., tig. 22. 



