A KKVISION iW TUK ArslK'AMAN irKlMK.K IIKI'I.KY. 2:V.\ 



AWATKIMA llt)V(,i:i Stin'lli. 

 I'lrurotonin (Drilllu) ho,,lei Smitli, Pnu-. Zool. Soc, 1891, p. 439, pi. xxxiv., 



ag. 9. 



Eah. N.S.Wales :— 410 fiithoms, off Sy.hiey (type, " Cliallenger "). 



AWATKlilA WATSOM SniHll. 



Pleurotuma (DrilUa) ivatsoni Smith, Proc. Zool. Soc, 1891, p. 439, pi. xxxiv., 

 fig. 10. 

 Hab. N.S.Wales :— 410 fathoms, off Sydney (type, " Cliallenger "). 



MlTRITHAKA gSU. )10V. 



Shell small, solid, biconical to cylindro-fasiform. Whorls four. 

 Protoconch blunt. Colour white or buff, uniform or spotted with brown. 

 Sculpture— close revolving cords, sometimes decussated with radial riblets. 

 No varix, lip thin, sinus evanescent, columella n.crassate, with an in- 

 distinct single or double plication. Canal wide and short, throat lyrate 

 within. Type, CohtmheUa alba Petterd. 



A characteristic member of this genus is the tertiary fossil _M/ira 

 daphuelloides Tenison-Woods,^^ from Muddy Creek, Victoria. This was 

 afterwards transferred by Tate and Cossmann to Mitrom.orpha.-^^ ihe 

 figure of the tertiary fossil Cordieria conospira Tate,-^'^ suggests that it may 

 belong here also. The recent African species Mitromorpha vulva bowerby, 

 is probably co-generic. 



Probably Mitrithara is related to Anthnitra:^^ I have not the means 

 to institute a comparison, but understand from Mr. Iredale that he 

 considers them distinct. 



Mitrithara alba Fetterd. 

 (Plate xliii., fig. 22.) 



Columbella alba Petterd, Journ. of Conch., ii., 1879, p. lO^^- ^''- ^^ w^' 

 Conch. Cab., iii., 1897, p. 288. Id. Tate, Journ. Roy. Soc. N.S.W ., 

 xxxi., 1897, p. 397. 



Mitromorpha alb" Tate and May, Proc. Linn. Soc. N.S.W., xxvi., 1904, 

 pp. 372, 455. Id. Verco, Trans. Roy. Soc. S.A., xxxiii., 1909, p. 3^b. 



Mitromorpha jUndemi Pritchard and Gatliff, Proc. Roy. Soc. Vict., xn., 

 1899, p. 104, pi. viii., fig. 6, and xviii., 1906, p. 51. 



■2^ Tenison-Woods— Proc. Linn. Soc. N.S.W., iv., 1880, p. 7, pi. ii., fig- 3. 

 23 Tate-Journ. Roy. Soc. N.S.W., xxxi., 1897, p. 397; Cossmann-Essai Pal. 

 Comp., vii., 1906, p. 22-1.. 



•24 Tate— Journ. Hoy. Soc. N.S.W., xxxi., 1898, p. 396. 



25 Sowerby— Marine SheUs of South Africa, 1892, p. 7, pi. i., fig- 16. 



26 Iredale— Proc. Mai. Soc, xii., 1917, p. 329. 



