312 RECORDS OF THE AUSTRALIAN MDSEUM. 



Sculpture: — The radials vary from bold spaced ribs projecting at the 

 shoulder to fine close riblets ; the entire shell, except the nucleus, is over- 

 run with fine, close, beaded or unbeaded threads. Aperture about half ' 

 the lenorfch of the shell, with or without armature ; outer lip slightly 

 inflected ; sinus snbsutural, deeply rounded ; canal short and open. 



Gurnleus is perhaps a development in tempei'ate seas of a tropical 

 citharoid stock in which less favourable growth conditions have effected 

 structural economies, by I'eduction of the varix, the teeth within the 

 aperture, granular microscopic sculpture, and a looser winding of the 

 vv^horls. Maiujilia glabra Harris and M. obsoleta Harris, fi'om the miocene 

 of Victoria, appears to be Gwaleii^. Mangilia sinclairi Smith represents 

 this genus in New Zealand. South Africa has at least one representative 

 of Guraleus in Clathurella amplexa Gould.^^ 



A division of Guraleus may be separated from the rest by rounded 

 shoulder, ovate contour, shorter spire, and smoother sculpture. It includes 



bellas, comptus, costat us, fallaciosus, flaccid us, insculptus, inoniatus, kingensis, 

 mitraVis, nitidus, permutatus, and schontenensis. This may be distinguished 

 as a subgenus Marita, with Cythara compta Adams and Angas for type. 



GcRALEDS BELLUS Adanis and Angas. 



Cithara bella Adams and Angas, Proc. Zool. Soc, 1863 (1864), p. 419, 

 pi. xxxvii., fig. 6. Id. Angas, Proc. Zool. Soc, 1865, p. 160. 



Mangelia hoakei Tryon, Man. Conch., vi., 1884, p. 270, pi. xxv., fig. 36. 



Mangilia adcocki Sowerby, Pi'oc. Malac. Soc. ii., 1896, p. 29, pi. iii., fig. 18. 

 Id. Pritchaid and Gatliff, Pioc. Hoy. Soc, xii., 1900, p. 174. Id.Tate 

 and May, Proc. Linn. Soc. N.S.W., xxvi., 1901, p. 370. Id. Verco, 

 Trans. Roy. Soc S.A., xxxiii., 1909, p. 312. 



In the British Museum there is one shell marked as the type of 

 G. bella. Sowerby changed the name of this species on the ground that 

 Mdtigilia bella was {)reoccupied hj Hinds, but as a mattei' of fnct Mangilia 

 was used for this species neither by Hinds nor by Adams and Angas, so 

 that the innovation was not necessary. Tryon erred in ascribing this 

 species to Ceylon. 



Hab. South Australia : — Rapid Ba}- (type, Angas); 14 to 22 fathoms, 

 Investigator Strait (Verco). Victoria: — Port Phillip, Western Port, and 

 Puebla (Gatliff). Tasmania: — North Coast (May). 



GdRALEUS BKAZIERl Ahgas. 



(Plate Hi., fig. 138.) 



Clathurella brazieri Angas, Proc. Zool. Soc, 1871, pp. 18, 93, pi. i., fig. 21. 

 Id. Tryon, Man. Conch., vi., 1884, p. 295, pi. xvii., fig. 98 (not 



»6 Bartsch— U.S. Nat. Museum. Hull. 1(1. lOlo, p. :<(). pi. ii., ti<r. lo. 



