NODULAEIA. 145 



laminatis erectisque, lateralibus laminatis brevibusque; margarita 

 pertenui albaque. 



Long. 20, lat. 38, diam. 18 mm. 



Hob. Burrill River (Dr. Burrougli) ; specimens in British 

 Museum from Moradabad, Agra, and E/ohilkund Streams (the last 

 figured in Conch. Icon. pi. x, fig. 1); in Indian Museum from 

 Assam and Saharanpur. 



The above description is amplified by the following note : 



" Shell ovate, transverse, inequilateral, inflated, pellucid : sub- 

 stance of the shell very thin ; beaks slightly elevated, rounded 

 and devoid of undulations : ligament very small : epidermis olive, 

 very thin and smooth : rays obscure : cardinal teeth large, erect, 

 and lameliiform ; lateral teeth short and lamelliform : anterior 

 cicatrices slightly confluent : posterior cicatrices confluent : dorsal 

 cicatrices not perceptible : cavity of the beaks wide : nacre very 

 thin and bluish white. 



"Remarks. It is a perfectly distinct species, and 



may easily be recognised by its form, its pellucidness and its 

 smooth olive-coloured epidermis. It somewhat resembles a young 

 Anodonta on the exterior, but the elevated lamelliform teeth 

 easily distinguish it from that genus. Its resemblance to a 

 Spanish olive is very striking." 



280. Nodularia (Nodularia) nuttalliana (Lea). 



Nodularia (Nodularia) nuttalliana (Lea) ; Simpson, Washington, 



D.C., Smiths. Inst., Nat. Mus. Proc. xxii, 1900, p. 817. 

 27mb nuttallianus, Lea, Proc. Ac. Nat. Sci. Philadelphia, viii, 



1856, p. 103 ; Obs. Genus Z7mb, vi, 1857, p. 30, pi. 30, fig. 25 ; 



Journ. Acad. Nat. Sci. Philadelphia, iii, 1858, p. 310, pi. 30, 



fig. 25 ; H. & T., C. I. p. 19, pi. 41, figs. 5, 6. 

 Margaron ( Unio) nuttallianus, Lea, Syn. 1870, p. 74. 



Original description : Testa laevi, elliptica, subinflata, inaequi- 

 laterali ; valvulis tenuibus ; natibus prominulis ; epidermide 

 olivacea, eradiata, valde polita ; dentibus cardinalibus parvis, rectis, 

 compressis crenulatisque ; lateralibus subcurtis, subrectis lamella- 

 tisque ; margarita salmonis colore tincto et iridescente. 

 ffab. India (Prof. Thomas Nuttall). 



No dimensions are given with the above description; there are, 

 however, several specimens of the species in the British and 

 Indian Museum Collections, of which the measurements of three 

 are as follows ; No. 1 being in the British and Nos. 2 and 3 in the 

 Indian Museum. 



1. 2. 3. 



Long 23-25 19 17'75 mm. 



Lat 38 31-25 28'5 mm. 



Diam 15 11-5 10'5 mm. 



Allied to N. olivaria, but of a darker colour and more convex, 

 with more rounded ventral margin and generally ovate form. 



