MYCETOPODA 1467 



Group of Mycctopoda solcniformis. 



Shell large, rounded in front, but somewhat truncated on 

 the lower anterior part ; base line evenly incurved ; posterior 

 ridge well developed, curved, truncate on posterior slope; 

 beaks central. 



Animal that of the genus. 



Mycetopoda solentformis d'Orbigny. 



Shell large, elongated, rhomboid, almost exactly equilateral, 

 subinflated, brown-green ; beaks but little elevated ; hinge line 

 straight ; base line somewhat sinuous, being incurved at and 

 behind the middle ; anterior end produced near the dorsal 

 line, cut away decidedly below ; posterior end obliquely sub- 

 truncate, somewhat biangulate below, ending in a point at its 

 base ; posterior ridge double, the lower one high and sharp ; 

 surface with strong growth lines, with radial lines in the mid- 

 dle : nacre blue. 



Length 224, height 56, diam. 30 mm. 



Bolivia ; Peru. 

 Mycetopoda soleniformis d'ORBiGNY, Guer. Alag., 1835, p. 41. 



— Chenu, III. Conch.. 1858. pi. I, figs, t, la. ih. — Simpson. 



Syn., 1900, p. 935. 

 Platiris (Mycctopiis) solcniformis Lea, Syn.. 1838, p. 34; 1852, 



p. 56; 1870, p. 90. 

 Mycetopus solcniformis Reeve, Conch. Syst., I, 1841, p. 125, 



pi. xciv.— d'ORBiGNY, Voy. Am. Mer.. 1843, P- 601, pi. Lxvi. 



— H. and A. Adams, Gen. Rec. Moll., IL 1857, p. 505; IH, 



pi. cxviiT, figs. 20, 2b. — Chenu, Man., 1859, IL p. i47» %■ 



725.— Reeve, Elements of Conch., II, 1860. pi. xxxii, fig. 



i8ifl, b. — SowERP.v, Conch. Icon., XM, 1868. pi. i, fig. i. — 



Ci.ESSiN, Conch. Cab. Ano., 1875, p. 201, pi. exviii, fig. i. 

 Mycetopus solenoides Sowerey, Conch. Man., 1839, fig. 151. 



A magnificent species, the largest and finest of the genus. 

 The location of the beaks almost midway between the anterior 

 and posterior ends, and the high, sharp, double posterior ridge 

 are characters that separate it decidedly from all other species. 



