690 STUDIES ON AUSTRALIAN MOLLUSCA, xiii., 



honour of the naturalist wlio has so successfully investigated 

 the invertebrata of that portion of the globe." But he again 

 described this species on p. 355 under the name of Cylherea 

 rivularis Born. The Sydney shell, which has a smooth ventral 

 margin, and so belongs to the section Circe, as restricted by 

 Jukes Brovi'ne,* appears to have been figured by Sowerby and 

 Reeve as Circe rivularis Born. But Brauerf has determined 

 Born's type of rivularis to be Circe crocea Gray, as figured by 

 Roemer, PI. Ivi., fig ^c. This is different from C. quoyi, being 

 more inflated, with coarser, umbonal, oblique folds. 



Schmeltz has identified the >Sydney shell as C. personata 

 Deshayes, 1853, but that was founded on a Nicobar species 

 figured by Chemnitz (Vol. vii., figs. 420-426), and was already 

 named Circe violacea by Schumacher in 1817. This, and not 

 scriptd Linn., was the type of the genus Circe. Perhaps the 

 figures of personata supplied by later authors were derived from 

 Australian shells. Angas referred the Sydney shell to Cytherea 

 undatina Lamk. This may be correct, and, if so, would take 

 precedence over quoyi or other names. But the literary history 

 of this is too meagre and contradictory for adoption. For 

 Roemer's figure of it agrees neither with Lamarck's description 

 of the colour-pattern, nor with Deshaj'es' determination of it as 

 scripta. Possibly Lamarck's species might be the neglected 

 Venus Wauaria Gmelin, 1791. 



Adams has figured J C. quoyi as the host of Myochama 

 stulchburyi. 



As the best expression of typical New South Wales G. quoyi, 

 Roemer's fig.l, Plate liv., may be selected. A variety from N. 

 W. Australia is shown by Reeve's PI. i., fig. 3a. A well marked 

 related form is C. triyona Reeve, 1863, not yet reported as Aus- 

 tralian, but here noted as from Stradbroke and Facing Islands, 

 Queensland. It is shown by Roemer's PI. 53, fig. 2, as Circe 

 plicatina. 



* Jukes Browne, Proc. Mai. See, xi., 1914, p. 66. 



tBrauer, S. B. Akad. Wien, Ixxvii., 1878, p. 132. 



t Adams, Proc. Zool, Hoc, 1852, PI. xv., fig. 4. 



