136 UNIONID.E. 



Original description : — Shell narrow, elongated, very tumid, very 

 thick, covered with a black, smooth epidermis, white within, 

 anterior teeth large, jagged, posterior teeth laminar, elongated ; 

 posterior side oblique, angular, acuminated at the end of the 

 angle, ventral margin slightly swelled {)osteriorly, then contracted, 

 straight in the middle ; anterior side very short, umbones large. 



No dimensions are given with the description, but the following 

 are tiiken from Sower by 's tigure. 



Long. 35-5, lat. 99 mm. 



JIab. India. 



267. Nodularia (Nodularia) caeruleus (Lea). 



Nodularia (Xodularia) cceruleus (Lea) ; Simpson, Syn. Naiades, 

 Washington, D.C, Smiths. Inst., Nat. Mus. Proc. xxii, 1900, 

 pp. 811, 8] i!. 

 Unio Cceruleus, Lea, Philadelphia, Pa., Trans. Amer. Phil. Soc. iv, 



p. 95, pi. 13, tig. 2o; Obs. on Unionidaj, i, p. 105, pi. Vi, 



fig. 25. 

 Margarita (Unio) cceruletis, Lea, Syn. 1836, p. 26 ; 1838, p. 20. 

 Maryaron {Unio) ceeruleus^ Lea, Syn. 1852, p. 30; 1870, p. 47. 

 Unio (jerhidoni, Eydoux, in Guer. Mag. de Zool. 1838, p. 9, pi. 118, 



ligs. 2, 2«, 2 i ; H. & T., C. I. 1876, p. 6, pi. 12, fig. 2. 

 Unio siibstriatus, Lea, Proc. Acad. Nat. Sci. Philadelphia, viii, 



1856, p. 93 ; Obs. on Unionidte, vi, 1857, p. 20, pi. 26, tig. 14. 

 Mnrf/aron (Unio) substriatus, Lea, Syn. 1870, p. 47. 

 Unio humilis, Lea, Proc. Acad. Nat. Sci. Philadelphia, viii, 1856, 



p. 93; Obs. on Unionidte, vi, 1857, p. 16, pi. 26, hg. 10. 

 Margaron {Unio) hmnilis, Lea, Syn. 1870. p. 32. 

 Unio corrianus, Kiister, Conch.-'Cab., U7iio, 1861, p. 229, pi. 67, 



tig. 5. 

 Unio leionia, Benson, A. M. N. 11. 1862, p. 192 ; H. & T., C. I. 



1876, p. 6, pi. 12, tig. 6. 

 Unio pilatus, Lea^ Proc. Acad. Nat. Sci. Philadelphia, x, 1866, 



p. 133; Jom-n. Acad. Nat. Sci. Philadelphia, vi, 1868, p. 181, 



pi. 38, tig. 95. 

 Maryaron { Unio) pilatus, Lea, S3'n. 1870, p. 47. 

 Unio evitfatus, Lea, Proc. Acad. Nat. Sci. Philadelphia, 1868, 



p. 133 ; Lea, Journ. Acad. Nat. Sci. Philadelphia, vi, 18(58, 



p. 279, pi. 38, fig. 92. 

 Maryaron (Unio) cristatus, Lea, Syn. 1870, p. 47. 

 Unio trirostris, Sowerby, Conch. Icon, xvi, pi. 65, fig. 331. 



Original description : — Testa angusto-elliptica, transversa, iuaequi- 

 laterali, subcylindracea ; valvulis tenuibiis ; natibus prominulis, 

 rotuudatis ; dentibus cardinalibus lainelliformibus, et in dextra 

 valvula sola dnplicibus ; lateralibus rectis margarita caeruleo-alba 

 et iridescente. 



Ilab. River Hooghly. 



To the above locality may be added the following, from which 

 specimens are represented in the Indian Museum, Calcutta : Eani- 

 pur; Siliguri ; Patna ; Jamalpur, Phenchoogauj, Central Sylhet; 

 Barrack Kiver, Silchar ; Darjiling; Ivochk ; Rajputana ; Manb- 

 hoom; Eohri, Sukkur District, Sind; Saharumpur, United 

 Provinces; Lower Nerbudda ; Sainbalpur, Bengal; Bhagulpur ; 

 Rajmahal ; L^mballa; Poonassa; Burwani; Bagh ; Hazrapur. 



