279 



low ribs are only delicately scaled. A\\ the ribs on the posterior part of the shell, however, 

 are spinose. 



Distribution : — C. (C) victor was described from Mauritius, but bas also been recorded 

 from other localities in the Indian Océan. 



In the "Siboga" collection there is a single young shell of this beautiful species dredged 

 between the Islands of Wowoni and Buton, northern entrance of Buton Strait (St. 204). 



20. Cardimn (? Ctenocardid) festivuin Deshayes. (Plate VI, figs. 29 — 32). 



1855. Cardimn festivum Deshayes, Proc. Zool. Soc. London (volume for 1854), p. 332. 



1884. Cardimn festitmm Grasset, Ind. Test. Viv., p. 274. 



1890. Cardimn [Cerastoderma) festivmn Paetel, Cat. Conch. Samm., III, p. 115. 



C. festivum is a species of small size. Its shell is fairly thick, compact and somewhat 

 quadrate in outline. The surface of the shell is ornamented with evenly developed and somewhat 

 rounded radial ribs ; thèse are delicately squamate. In older shells the scales are often rubbed 

 ofif and the shell surface appears smooth. I figure two shells of this species. 



The subgeneric position of this species is rather doubtful. In its form and gênerai faciès 

 it closely resembles such species as C. {C.) fornicatum, but the sculpture is very poorly developed, 

 and I am doubtful whether it can be assigned to the subgenus Ctenocardia H. 8z; A. Adams. 



Distribution: — C (? C) festivum was described from New Ireland. There is also in the 

 British Muséum collection a shell of this species from Fiji. 



The "Siboga" shells, which I after comparison with the types assign to this species, were 

 collected in the Bay of Pidjot, Lombok (St. 33), Sailus Ketjil, Paternoster Islands (St. 37), Bay 

 of Badjo, West coast of Flores (St. 50) and the Anchorage between Nusa Besi and N. E. 

 point of Timor (St. 282). 



21. Cardiuin {Laevicardiuni) aurantiacu^n Adams & Reeve. 



1850. Cardimn aurantiacmn Adams & Reeve, "Samarang" Moll., p. ']'], pi. XXII, fig. 4. 



1860. Cardiimi am'antiacmn Reeve, Elem. Conch., II, p. 102. 



1890. Laevicardium aurantiacmn Paetel, Cat. Conch. Samm., III, p. 118. 



1906. Cardimn [Laevicar dium) aurantiacmn Melvill & Standen, Proc. Zool, Soc. London, p. 83g. 



I refer a single somewhat weathered valve dredged at St. 98 (6° 9' N., 120° 21' E., 

 350 meters) to C. (Z.) aurantiacum. The measurements of this valve are: — Height 29 mm., 

 Length 27.8 mm.-, and it agrées in shape with the figure of the species by Adams and Reeye. 



22. Car dium [Laevicar diunt) biradiatuin Bruguière. 



1782. Cardium laevigattini etc. Chemnitz, (non Linn.), Conch. -Cab., VI, p. 191, pi. XVIII, 



figs. 185, 186. 



1784. Cochlea colmnhina Martijn, Univ. Conch., III, p. 146. 



1788. Cardimn laevigatum Schroter. (non Linn.), Conch. -Cab. Namen Reg., p. 19. 



1789. Cardimn biradiatum Bruguière, Encyclopéd. Méthod., II, p. 231. 



1790. Cardium serratum Gmelin (non Linn., ex parte), Syst. Nat., (ed, XIII), p. 3251. 

 1797. Bruguière, Encyclopéd. Méthod., pi. CCXCVIII, fig. 6. 



1817. Cardium serratum Dillwyn (non Linn:), Descr. Cat., I, p. 124. 



