BY C. HEDLEY. 539 



What von Martens figured"*^ under the name of Lutraria 

 {Merope) nicobarica Gmel., appears to be a different species. 



ECTORISMA GRANULATA Tate. 



Tate, Trans. Roy. Soc. S. Australia, xv. 1892,p.l27,pl.i.,fig.3,3a. 



A living specimen of this was taken by Mr. G. H. Halligan and 

 myself 16 miles east of Wollongong in 100 fathoms, and again 

 by Mr. W. F. Petterd and myself 27 miles east of Sydney in 300 

 fathoms. It had not before occurred beyond the coast of South 

 Australia. 



Crassatellites kingicola Lamarck. 



In the last part of this series I discussed the nomenclature of 

 this species, and concluded that the name of C. j^onderosus 

 Gmelin ought to be applied to it. Australian naturalists have 

 since benefited by an examination of the question by Mr. E. A. 

 Smith, t With greater skill in the elucidation of such problems, 

 and with material and literature inaccessible to me, Mr. Smith 

 shows that the southern origin ascribed by its introducer was 

 false, and that Gmelin's C. ponderosus is the Grignon fossil 

 C. tumida Lamarck. This decision permits the use of C. kingicola 

 Lamarck for the Australian shell. 



Dr. J. C. Verco has recently discussed | the range and variation 

 of the species in South Australia. 



CONDYLOCARDIA OVATA, n.sp. 



(Plate xxxi., figs. 5, 6.) 



Shell rather large for the genus, glossy, thin, translucent, 

 obHquely ovate. Colour white. Sculpture : about fourteen 

 concentric wave ribs, more or less developed, close microscopic 

 concentric threads oblique to the main sculpture. Prodissoconch 

 prominent, no free edge, a gently swelling central imperforate 

 boss, finely concentrically corrugate. Muscular impressions 



* Journ. Linn. Soc. Zool. xxi. 1887, p.217, pi. xvi., f.7a, h. 



t Journ. of Malacology xii. 1905, p. 26. 



X Trans. Roy. Soc. S. Austr. xxix. 1905, p. 169. 



