386 



" THETIS " SCIENTIFIC RESULTS. 



below tlie shoulder the shell is furrowed by numerous fine 



spiral gi'ooves, crossed by arcuate growth 



y^ lines, above the furrows are broader and 



/23^ fewer. Aperture narrow, sinus sutural and 



/" "^ deep, outer lip (broken in my example) 



appears to have curved far forward, columella 



angled in the centre, spreading broadly and 



with a small anterior plication. Length, 1 8 mm.; 



breadth, 8 mm. 



Though the single available specimen is too 

 worn and faded to afford particulars of the 

 colour, protoconch, &c., I am induced to describe 

 it because it adds a genus as well as a species 

 to our fauna. In ascribing it to BcUhytovia, I 

 am guided by the account given by Harris.* 

 From 19-20 fathoms in the Shoalhaven 

 Fig. 98. Bight. 



LErfCOSYRINX, Ball. 



LEUCOSYRINX RECTA, sp. nov. 



(Fig. 99.) 



Stations 13, 35, 37, 49. 



Shell pagodiform, thin, tall and narrow. The last whorl has 

 a median cylindrical area, angled above and 

 below. The keel along the lower angle is 

 buried by the suture of the following whorl ; 

 that along the upper angle projects more and 

 ascends the spire to the protoconch, where it 

 suddenly ceases. Above the upper keel the 

 whorl slopes to the suture, below the lower 

 the base is concavely excavated. Colour pale 

 yellow. Whorls four, plus the protoconch, 

 wound obliquel}'. Sculpture : the topmost 

 whorl is undulated by about sixteen broad 

 radial ribs, which disappear on the next whorl. 

 Fine and coarse spiral threads alternate over 

 the whole surface, and are crossed by fine 

 growth lines. Protoconch exsert, white, 

 smooth, two-whorled. Aperture broad, lip 

 simple, no apparent sinus, canal short, open, 

 straight. Length, 6 mm.; breadth, 2*5 mm. 



Fleurotoma ( Surcula) starninea, Watson,! 

 appears a near ally of this species. 



Fig. 99. 



* Harris— Biit. Mus. Cat. Tert. Moll. Austr., 1897. p. 48. 

 + Watson— Chall. Rep., Zool., xv., 1886, p. 280, pi. xx., f, 3. 



