2 I 1 



striae. The rounded anterior side is greatly produced, while the posterior side is obtusely angled 

 below, and slants abruptly from the umbonal area. The escutcheon is narrowly rhomboid and 

 concave. I figure the unique shell from the "Siboga" collection. 



Weinkauff was of opinion that M. dolabrata is based on a young shell, and is probably 

 allied to M. explanata Deshayes. Lamy also is of the same opinion, but in this latter species 

 the anterior side is broad, obtuse and rather shorter than the posterior. The posterior side is 

 described by Reeve as "slanting and attenuated, gaping"; this is far from the case in C. dolabrata^ 

 as the two valves fit perfectly in this species. 



Distribution : — M. {^f.) dolabrata was described from a single shell of unknown habitat. 



The "Siboga" shell was collected at the Anchorage off Pulu Jedan, east coast of Aru 

 Islands (St. 273). 



Subfamily Lutrariinae. 



Genus Lutraria Lamarck. 



1799. Lutraria Lamarck, Mém. Soc. Hist. Nat. Paris, p. 85. 



1822. Lutraria Children, Quart. Journ. Sci. Lit. Arts, p. 86. 



1856. LAitraria Adams, H. & A., Gen. Rec. MolL, p. 383. 



1887. Lutraria Fischer, P., Man. Conchyliol., p. 118. 



1898. LîUrana Dali, Trans. Wagner Free Inst. Sci. Philadelphia, III, p. 883. 



Dall has discussed in détail the status of the subfamily Lutrariinae and his définition 

 of the genus Littraria does not need any élaboration. 



LiUraria solenoides ■=■ Ltitraria obloitga (Gmelin) was designated as the type of Lutraria 

 by Children. 



I. Ltitraria philippinarum Reeve. 



1854. Lutraria Philippinarum Reeve, Conch. Icon., VIII, Lutraria, pi. I, fig. 4. 



1855. Lutraria Philippinarum Deshayes, Proc. Zool. Soc. London (vol. for 1854), p. 71. 



1856. Lutraria Philippinarum Adams, H. & A., Gen. Rec. MolL, II, p. 384. 

 1860. Lutraria Philippinarum Reeve, Elem. Conch., II, p. 145. 



1865. Lutraria Philippinarum Angas, Proc. Zool. Soc. London, p. 645. 



1867. Lutraria Philippinarum Conrad, Amer. Journ. Conch., III, p. 43. 



1884. Lutraria Philippinarum Grasset, Ind. Test. Viv., p. 249. 



1890. Lutraria Philippinarum Paetel, Cat. Conch. Samm., III, p. 36. 



1896. Lutraria Philippinarum Casto de Elera, Cat. Sist. Filip., p. 717. 



1903. Lutraria Philippinarum Hidalgo, Obras MalacoL, p. 60. 



1905. Lutraria Philippinarum Hidalgo, Cat. Filip., p. 302. 



1910. Lutraria Philippinarum Hedley, Austral. Ass. Adv. Sci., XII, p. 351. 



T924. Lutraria Philippinarum Tomlin, Journ. Conch., XVII, p. 136. 



1928. Lutraria Philippinarum Faustino, Summary Philippine Mar. Freshw. MolL, p. 1 10. 



The very inequilateral, oblong-elongate shell of this species is deepest in the umbonal 

 région ; the anterior and posterior sides are attenuate, rounded and the sculpture consists of 

 fine, concentric striae. 



Distribution: L. philippinarum has been recorded from the Philippines and round 

 Queensland, Australia. 



