224 CYRENIDJE. 



365. Sphaerium avanum, Theobald. 



Spharium avanum, Theobald, J. A. S. B. 1873, xlii, pt. 2, p. 209, 

 pi. 17, fig. 6. 



Original description : Testa quadrate rotunda, tumida, antice 

 rotundata, postice truncata, dilatata, equilateral!. Epidermide, 

 leyiter et concentrice corrugata, postice levissime radiata. Um- 

 bonibus prominentibus, tumidis, osculantibus ; colore pallide 

 stramineo, tribus fasciis purpureis umbonalibus radiatim picto. 

 Ligumento umbones versus inflate. 



Long. 6-6, lat. 7*5, diam. 5'2 mm. 



Hob. Near Ava. 



366. Sphserium indicum (Deshayes, MS.\ A. Adams. 



Spharium indicum (Desh. Ms.), A. Adams, P. Z. S. xxii, 1854, 



p. 342, & Cat. Brit. Mus., Conchif. p. 265. 

 Oyclas indica, Deshayes, H. & T., C. I. pp. 62-63, pi. 155, fig. 9. 



Original description : Testa ovato-rhomboidea, tumidula, sequi- 

 laterali, tenui, pellucida, albo-grisea ; Jatere antico late rotundato, 

 postico obtuse truncate ; umbonibus tumidis, paruin prominenti- 

 bus ; cardine obsolete bidentato, dentibus lateralibus candidis, 

 antico majore, trigono, acuto, postico paulo breviore, valvis sub 

 lente tenuissime striatis. 



No dimensions, habitat, or figure are given with the above 

 description, but the habitat attached to the types is " Loodiana, 

 Punjab," and that given in the Conch. Ind. " Moradabad" ; the 

 following dimensions are taken from three specimens of the type 

 series in the British Museum : 



1. 2. 3. 



Long 5-25 5-5 4'7o mm. 



Lat 6-25 6-25 5 mm. 



Diam 3*5 3'75 2'75 mm. 



Genus PISIDIUM. 



Pisidium, C. Pfeiffer, Naturgeschichte deutscher Land- imd Sliss- 

 wasser-Mollusken, i, 1821, p. 123, pi. 1, fig. 19; ii, 1825, p. 33; 

 iii, 1828, p. 68. 



Tellina, Miiller, V^rm. ii, 1774, p. 205. 



Spharium, Scopoli, Introduct. 1777, p. 397. 



Cardium, Poli, Test. Sicil. i, 1791, p. 65, pi. 16, fig. 1. 



Cyclas, Draparnaud, Tabl. Moll. 1801, p. 106. 



Pera, Cordula, Leach, in litt. in Mus. Brit. 1818-20. 



Phymesoda, Rafinesque, Ann. Gen. Sc. Phys. et Nat. v, 1820, p. 319. 



Gallileja, Costa, Corrisp. Zool. 1839. 



Pisum, Gray (non Megerle), P. Z. S. xv, 1847, p. 184. 



Musculium, Gray (non Link), 1851. 



Pisum, Deshayes (non Megerle), Cat. Brit. Mus., Conchif. 1854. 



Musculium, H. & A. Adams (non Link). 



Pisum, H. & A. Adams (non Megerle), Gen. Rec. Moll, ii, 1858. 



