224 kecoi;d8 ok thk austkai>ian museum. 



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FiLODRILLIA STALHALIS >7<. 



(Plate xlii., tig. 10.) 



Sliell siiiaJl, t arreted, ()vate-fiisitV)i'in. Culoiii dull white, the glassy 

 opaque protoconcli coiUi'astiiig with the dull texture ot" the rest of the 

 sliell. Whorls six, inclusive of a two-whorled protocouch, rather inflated, 

 sharply augled at the shoulder. Sculpture: — Five fine close threads 

 traverse the fasciole area ; below the shoulder angle thirteen spaced cords 

 become |)rogressively smaller and closer towards the end of the shell, four 

 of these ascending to the penultimate and two to the uppermost whorl ; 

 faint curved radial dashes start below the shoulder angle and vanish on 

 the base. Aperture open, without varix ; sinus broad and deep ; canal 

 short and open. Length (3'5 mm., breadth 3 mm. 



Compared with its all}' F. (inntta, F. stuih'idis is a shorter, stouter 

 shell, with a more elevated protoconcli, fewer spirals, and fainter radials. 



Hah. N. S. Wales: — 100 fathoms, Wollongong (type) ; 80 fathoms, 

 Xarrabeen (self); 59 fathoms, Wata Mooli ("Thetis")." 



FiLODRILLIA STEIRA xp. nOV. 



(Plate xlii., fig. 11.) 



Shell small, solid, biconical. Colour uniform pale bul¥. Suture 

 channelled. Whorls seven, of which two constitute the protoconcli. 

 Sculpttire : — The dominant feature is a prominent peripheral keel re- 

 volving round all the whorls ; the summit of each whorl is crowned by a 

 double thread ; along the fasciole area run four slender threads ; between 

 the keel and the anterior end of the sliell occur about twenty cords, 

 diminishing pi'ogressively as the}' lecede from the periphery; numerous 

 crescentic threads cross the excavate fasciole ; fine radial lines also appear 

 in the interstices of the basal spirals. Aperture : — Sinus wide and deep, 

 canal short and open, a thin film of callus on the upper lip fiength 8 mm., 

 breadth 3'5 mm. 



Compared with .1. iJiJcrtit this is a shorter, broader shell, and is 

 especially distinguished by the j)rominent single keel on the periphery. 



Hah. N. S.Wales:— 50 fathoms. Cape Three Points (type); 50 

 fathoms, Botany Heads (" Thetis "); 59 fathoms, Wata Mooli (" Thetis "); 

 24 fathoms, Cabbage Tree Island (Museum Expedition); 111 fathoms, 

 Cape Byron (Halligan) ; 80 fathoms, Gabo Island (" Endeavour ") ; 80 

 fathoms, Narrabeen (self). 



Fii,o|ii;iLLiA Ti;opii0N0il)KS Verfo. 



Ilrilliii frojiliotii:ii(hs Verco, Trans. Koy. Soc. S.A., .xxxiii., 1909, p. 303, 

 pi. xxvi., figs. 3, 4. 



H((h. South Australia: — 150 fathoms, Beacliport (type); 55 fathoms. 

 Cape Borda ; 130 fathoms, Cape Jaffa (Verco). 



