120 24 



Area (Anadara) uropygomelana, Bory. 



Area uropigimelana, Boiiv de Si Vincent, Encyclopédie method., 1797, pi. 307, fig. 2. 



— (Anomalocardia) uropygmelaim, Bory, Martini u. Chemnitz, Conchyl. Cabin., VIII, 2 Abth.. p. 85. 



pi. 23, figs. 5-6. 



— {Anadara) uropygmelana, Bory de Saint-Vincent, Lamy, Bull, du Mus. d'Hist. Nat. Paris, 1904, p. 277. 



— — — — — Journ. dc Conchyl., vol. 55, 1907, p. 207. 



— holoserica, Reeve, Proc. Zool. Soc. London, XII, 1844, p. 39. 



— — — Conchol. icon., II, Area, Sp. 11. 



— — - MoRLET, ,Iourn. de Conchyl., vol. 37, 1889, p. 162. 



— {Anadara) holosericea, Reeve, P. Fischer, Catal. de Moll, de I'lndo-Chine, p. 216. 



— — holoserica, — Edg. Smith, Proc. ZooI. Soc. London, 1891, p. 431. 



MoRLET (loc. cit.) states that the present species {A. holoserica, Reeve) is taken 

 at "Isles du golfe de Slam." Lamy, however, points out (Journ. de Conchyl., vol. 

 55, 1907, p. 242) that this statement is due to erroneous determination hy Morlet, 

 and that the specimens belong to Area cornea, Reeve var. Cecillei (Phil.), Lamy 

 (compare this species). Nor did the Danish Expedition to Siam collect any specimens 

 of A. uropygomelana, Bory (= A. holoserica. Reeve). 



Distribution: — Salanga (Malacca), Felidu Atoll and Hulule Isl. (Maldive 

 Archip.), Gulf of Aden, Red Sea, Mauritius, Madagascar, Seychelles, East Africa, 

 Querimba Isis. — Philippines, Java, Togean Isis., Moluccas, Gilbert Isis. (Kingsmill), 

 New Caledonia. 



Sturany* states that a specimen (of A. scapha, Chemn.) resembling A. holo- 

 serica, Reeve, has been taken at Ras Abu Somer (Red Sea). W. J. Hall and 

 R. Standen state" that A. uropygomelana, Bory, has been taken on "a raised coral 

 reef" at Port Sudan, near Suakim, on the west coast of the Red Sea. Lastly, Lamy 

 states" that specimens from the Red Sea are in the Paris Museum. 



Area (Anadara) Mortenseni, n. sp. 



(PL il. Figs. 1-2). 



This shell is oval, thin, and rather ventricose. The front passes evenly 

 and with rounded outline into the ventral side, while the hinder part is more 

 straightly truncate, and forms a rounded angle with the ventral part. Il is white, 

 and bears about 47 sharp radiating ribs which are closely covered with small, 

 regularly-arranged nodules and scales, crossed by fine, concentric lines of growth 

 which give the surface a beautiful, reticulated appearance. Not all the radiating 

 ribs extend over the unibones, but many unite with an adjacent rib. The inter- 

 stices between the ribs are generally narrower than the ribs, and are finely sculp- 

 tured. A keel, upon which the radiating ribs are further apart and stouter than 

 are the other ribs, extends from the umbones towards the posterior part of the 

 ventral side. Owing to this keel, the well-raised, prominent umbones become oblique, 

 and are higher towards the hinder part. The umbones are situated at about the 

 middle of the shell, a trifle nearer its anterior end. The ligament-area is small 

 and narrow. There are about 25—26 hinge-teeth, divergent on each side of the 

 centre. The interior is white; the exterior ribs are there slightly noticeable, and 



' Lamcllibr.Tiichiaten d. Rothen Meeres, 1899, p. 36. 

 - .lounial (if Conchology, vol. 12, 1907, p. 68. 

 ' h>c. cit., .louin. de Conchyl., 1907, p. 209. 



