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NODULAEIA. 145
laminatis erectisque, lateralibus laminatis brevibusque; margarita
pertenui albaque.
Long. 20, lat. 38, diam. 18 mm.
Hah. Burrill Eiver (Dr. Burrougli) ; specimens in British
Museum from Moradabad, Agra, and Eohilkund 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 : substance
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.
"BemarJcs.— 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).
Nodiilaria {Nodularia) nuttalliana (Lea) ; Simpson, Washington,
.D.C., Smiths. Inst., Nat. Mus. Proc. xxii, 1900, p. 817.
TJnio nuttallianns, Lea, Proo. Ac. Nat. Sci. Philadelphia, viii,
1856, p. 103 ; Obs. Genus Unio, vi, 1857, p. 80, pi. 30, flg. 25;
Journ. Acad. Nat. Sci. Philadelphia, iii, 1858, p. 310, pi. 30,
flg. 25 ; H. & T., 0.1, p. 19, pi. 41, figs, 6, 6.
Margaron {Unio) nuttallianus, Lea, Syn. 1870, p. 74.
Original description:—-Testa Iffivi, elliptica, subinflata, insequilaterali;
valvulis tenuibus ; natibus prominulis ; epidermide
olivacea, eradiata, valde polita; dentibus cardinalibus parvis, rectis,
compressis crenulatisque ; lateralibus subcurtis, subrectis lamellatisque
; margarita salmonis colore tincto et iridescente.
Hab. 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. oUvaria, but of a darker colour and more convex,
with more rounded ventral margin and generally ovate form.
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