125 



1906. Lima {Ctenoides) fragilis Standen & Leicester, Ceylon Pearl Oyster Rept., V, p. 288, 

 1906. Lima {Mantellum'^.) fragilis Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat.-Math., 



(7) V, p._ 158. 

 1909. Lima fragilis Melvill, Trans. Linn. Soc. London (ZooL), XIII, p. 128. 

 191 1. Lima fragilis Pelseneer, "Siboga" Lamellibranches (Anat.), pp. 33 — 35, pi. X, figs. 1,3,9. 

 1917. Lima fragilis Odhner, Kungl. Sv. Akad. Handl., LII (N° 16), p. 13. 

 1919. Lima [Mantellum] fragilis Thiele, in Martini-Chemn. Conch-Cab., (N. F.), VII (2a), 



Limidae, p. 34, pi. I, fig. 2 ; pi. VI, fig. 4. 



1928. Lima fragilis Faustino, Summary Philippine Mar. Freshw. Moll., p. 37. 



1929. Lima [Mantellum) fragilis Dautzenberg, Faun. Colon. Français., III, p. 560. 



1930. Lima [Mantellum) fragilis Thiele, Faun. Sùdwest Austral., V, p. 591. 



This interesting species is distinguished by its rather thin, translucent, not very convex 

 and somewhat elongated oval shell, which bears hollow, thread-like ridges running up to the 

 margin and making it slightly dentate. 



In addition to the synonymy given above, Von Martens and following him Lynge and 

 Thiele hâve suggested that Lima linguahcla Lamarck ^) from Van Diemens' Land is only a 

 synonym of this species. A shell labelled as L. linguahila in the British Muséum (Nat. Hist.), 

 London, is certainly nothing more than a typical shell of L. fragilis. 



Distribution : — L. [L.) fragilis is represented by shells obtained at Anchorage off Pulu 

 Sarassa, Postillon Islands (St. 43), Bay of Bima (St. 47), Bay of Badjo, west of Flores (St. 50), 

 Bank between the islands of Bahuluwang and Tambolungan, South of Saleyer (St. 66), Macassar 

 (St. 71), Pulu Sanguisiapo, Tawi Tawi Islands, Sulu Archipelago (St. 93), St. 98 (6°9^N., 

 i20°2i'E.), Anchorage north of Damar Island (St. 144), St. 164 (1° 42^,5 S., 130° 47^.5 E., depth 

 32 mètres), Waru Bay, North coast of Ceram (St. 174), Sanana Bay, east of Sula Besi (St. 193), 

 Anchorage off the South point of Kabaëna Island (St. 209), Saleyer Anchorage (St. 213), 

 St. 225 (5700 Mètres North, 279° E. from South Point of South Lucipara Island), Ambon 

 Anchorage (St. 231), Anchorage off Pulu Jedan, East Coast of Aru Islands (St. 273), Mid-Channel 

 in Solor Strait (St. 305) and St. 306 (8° 27' S., 122° 54^.5 E.). 



6. Lima [Limaria] orientalis Adams & Reeve. (Plate III, figs. 32, 33). 



1850. Lima orientalis Adams & Reeve, "Samarang" MoUusca, p. 75, pi. XXI, fig. 7. 



1858. Radula [Mantellum) orientalis Adams, H. & A., Gen. Rec. Moll., II, p. 558. 



1860. Lima orientalis Reeve, Elem. Conch., II, p. 60. 



1871. Radula [Mantellum) orientalis Angas, Proc. Zool. Soc. London, p. loi. 



1885. Lima angulata Smith (ex parte), "Challenger" Lamellibranchia, p. 289. 



1909. Litna [Mantellnm) angulata Lynge, D. Kgl. Vidensk. Selsk. Skr. Nat.-Math., (7) V, p. 159. 



1913. Lima [Mantellum) angulata Suter (nec Sowerby), Man. New Zealand Moll. p. 885. 



191 5. Lima [Mantellum) angulata Suter, (nec Sowerby), Man. New Zealand Moll. Atlas, 



PI. LXIII, fig. 4. 

 1919. Lima [Mantellum) angulata Thiele (ex parte) in Martini-Chemn. Conch.-Cab. (N. F.), 



VII [2a), Limidae p. 29. 



After a careful examination of the available material I hâve no doubt that Smith was 

 wrong in considering the Philippine species L. (Z.) orientalis of Adams and Reeve as a synonym of 

 the Panaman L. angulata Sowerby. The shell of L. {L.) orientalis is comparatively much narrower, 

 more elongated and more oblique ; its almost straight anterior margin descends obliquely ; the 



i) Lamarck, J. B. — Anim. sans Vevtèb., VI, p. 157 (i8ig). 



