. Mollusca ... Mollusks. 162 tjitionibjE. ovata, valde inaequilaterali, crassa, subinflata, antice rotundata, postice superne sensim descendente, demum obtusa, margine ventrali convexiusculo, postice vix emarginato; disco laeviusculo, concentrice leviter striatulo, antice obsolete radiato-striato, versus marginem ventralem et posteriorem plicato ; epidermide olivaceo- fusca; umbonibus convexis, decortieatis, obsolete radiato-sulcatis, apicibus prominentibus obtusis, remotiusculis ; lunula elongato- elliptica; ligamento brevi; dentibus cardinalibus crassioribus, radiatim eroso - sulcatis, later
. Mollusca ... Mollusks. 162 tjitionibjE. ovata, valde inaequilaterali, crassa, subinflata, antice rotundata, postice superne sensim descendente, demum obtusa, margine ventrali convexiusculo, postice vix emarginato; disco laeviusculo, concentrice leviter striatulo, antice obsolete radiato-striato, versus marginem ventralem et posteriorem plicato ; epidermide olivaceo- fusca; umbonibus convexis, decortieatis, obsolete radiato-sulcatis, apicibus prominentibus obtusis, remotiusculis ; lunula elongato- elliptica; ligamento brevi; dentibus cardinalibus crassioribus, radiatim eroso - sulcatis, lateralibus obliquis, utriusque valvse duplicibus, subflexuosis ; margarita albida, iridescente. Long. 30, lat. 48, diam. 21 mm. Anterior cicatrices subconfluent, posterior entirely so, apical ones under the cardinal tooth; cavity of the beaks very deep. Ildb. Gungun River, near Moradabad, Eohilkhund. Specimens in the Indian Museum from Arrah. A very distinct cuneiform variety. Var. plagiosoma {Benson). Unio plagiosoma, Benson, A. M. N. H. x, 1862, p. 191. Unio favidens, var, plagiosoma, H. & T., C. 1. 1876, p. 6, pi. 11, fig.'3. Original description :—Testa transverse trigono-ovata, inaequi- laterali, crassiuscula, tumidiuscula, antice rotundata, postice siib- convese declivi, demum obtusa, margine ventrali convexiusculo; disco obsolete plicato, epidermide luteo-olivacea vel olivaceo-f usca; umbonibus convexis, prominentibus, decortieatis, angulatim. Fig. \i.—Parreysia {P.) favidens (Bens.), (Bens.). (Type.) Nat. size. flexuo,so-sulcati8, apicibus prominentibus subremotis; ligamento brevi; carina umbonali obtusa; lunula elliptica; dentibus cardi- nalibus crassiusculis, radiatim eroso-sulcatis, lateralibus sub- elevatis, modice eloiigatis, obliquis, valvae sinistrae duplicibus, dextrae simplicibus : margarita colore salmonis tincta. Long. 26, lat. 39, diam. 18 mm. „ 22, „ 32, „ 15 mm. "The anterior cicatrices, as well as the posterior, are sub- conf
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Keywords: ., bookauthorg, bookcentury1900, bookdecade1900, booksubjectmollusks
