264 



1929- Veiieriipts niacrophylla Dautzenberg, Faun. Colon. Français., III, p. 605. 

 1930. Venertipis irus Lamy (nec Linn.), Faun. Sudwest Austral., V, p. 594. 



I cannot agrée with Lynge that the Philippine spécimens, which Deshayes named Vene- 

 rupis macrophylla^ cannot be distinguished from the Mediterranean V. irtis (Linn.). The shells 

 of V. macrophylla are generally more délicate, more ovoidal, less elongated but deeper, the 

 concentric lamellae are less numerous, but often more foliaceous, particularly towards the posterior 

 end, and the radial sculpture is much finer. 



Distribution : — V. macrophylla is widely distributed in the Indo-Pacific Région. 



The "Siboga" Expédition collected two shells of the species at Tuai Anchorage, Kei 

 Islands (St. 258) and Sangkapoera roads, Bawean Island (St. 323). 



Family Petricolidae. 



Genus Petricola Lamarck. 



i8or. Petricola Lamarck, Syst. Anim. sans Vertèb., p. 121. 



1822. Petricola Children, Quart. Journ. Sci. Lit. Arts, XIV, p. 302. 



1844. Ckoristodon Jonas, Zeitschr. Malakozool., I, p. 185. 



1853. Naranio Gray, Ann. Mag. Nat. Hist., (2) XI, p. 38. 



1857. Ckoristodon Adams, H. & A., Gen. Rec. Moll., II, p. 441. 



1887. Petricola and Naranio Fischer, Man. Conchyliol., p. 1088. 



1900. Petricola Dali, Trans. Wagner Free Inst. Sci. Philadelphia, III, p. 1057. 



1923. Petricola Lamy, Journ. Conchyliol., LXVII, p. 314. 



Dall suggested Petricola lapicida (Chemnitz) = P. lapicida (Gmelin) as the génotype 

 of Petricola Lamarck. Lamy, on the other hand, cited Petricola lithophaga (Retzius) as the 

 génotype, and since Children had definitely designated Petricola striata Lam., which is a 

 synonym of P. lithophaga in 1822, this désignation must stand. 



I agrée with Lamy that it is possible to recognize a distinct subgenus for the species 

 which hâve an oval shell, more rounded than that of Petricola s. s. and which are provided 

 with a radial sculpture consisting of divergent or zigzag striae. The correct name for this sub- 

 genus is not Naranio but Choristodon Jonas, type Petricola [Choristodon) typica (Jonas), as 

 Naranio Gray is an absolute synonym of the former. 



I. Petricola. [Choristodon^ divergens (Gmelin). 



1788. Venus divaricata etc. Chemnitz, Conch.-Cab., X, p. 357, pi. CLXXII, figs. 1666, 1667. 



1788. Venus lapicida Schroter, Conch.-Cab. Namen Reg., p. 112. 



1790. Venus divergens Gmelin, Syst. Nat., (éd. XIII), p. 3269. 



1801. Petricola costata Lamarck, Syst. Anim. sans Vertèb., p. 121. 



1802. Venus lapicida Bosc, Hist. Nat. Coq., III, p. 45. 



1817. Venus lapicida Dillwyn, Descr. Cat., I, p. 190. 



1818. Petricola luctnalis Lamarck, Anim. sans Vertèb., V, p. 504. 



1824. Petricola lucinalis Dubois, Epitome, p. 52. 



1825. Venus lapicida Wood, Ind. Test., pi. VIII, fig. 72^. 



1835. Petricola lucinalis Deshayes in Lamarck, Anim. sans Vertèb., VI, p. 157. 

 1842. Petricola Costata Hanley, Rec. Biv. Shells, p. 53. 



