NO. 1205. SYNOPSIS OF THE XJIADES— SIMPSON. 905 



(Group of Mutela rostrata.) 



Shell somewhat inflated, thin, elongated, with a low, rounded poste- 

 rior ridge ending in a point about mid^vay up from the base; beaks 

 low, smooth; epidermis bluish green, ray less; hinge line edentulous or 

 having only the faintest vestiges of denticles; muscle scars large, 

 shallow, indistinct; nacre bluish, shaded violet. 



Animal the same as in typical Mutela. 



t MUTELA ROSTRATA Rang. 



*Iridina rostrata Rang, Nouv. Ami. Mus., 183.5, j). 316. — * Potiez and Michaud, 



Gall. Moll., 1814, p. 147, pi. lvi, fig. 1. 

 ''Spatha rostrata vON Martens, Mai. Bl., XIII, 1866, p. 11. 

 "Mutela rostrata Jickeli, Faun., 1874, p. 269. — * Westerlund, Fann. Pal., II, Pt. 



7, 1890, p. 312.—^ PiETEL, Conch. Sam., Ill, 1890, p. 187. 

 ""Mutelina rostrata Bourguignat, Bull. Soc. Zool. de Fr., II, 1886, p. 488. 

 ""Tridina coclestis Lea, Syn., 1836, p. 57 ; * Tr. Am. PMl. Soc, VI, 1838, p. 82, pi. xxii, 



fig. 70; *Obs., II, 1838, p. 82, pi. xxii, fig. 70.—* Troschel, Arch, fiir Nat., V, 



1839, Pt. 2, p. 239.—* Hanley, Biv. Shells, 1843, p. 225.— *Catlo wand Reeve, 



Conch. Nom., 1845, p. 68.—* Troschel, Arch, fiir Nat., XIII, 1847, I, p. 273.— 



* Sowerby, Couch. Icon., XVI, 1868, pi. ii, fig. 3. 

 ""Platiris (Spatha) coelestis Lea, Syn., 1838, p. 33; 1852, p. 55; 1870, p. 89. 

 *Mutela coclestis H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 506. — * Clessin, 



Conch. Cab. Ano., 1876, p. 193, pi. xxv, figs. 1, 2. — *P.etel, Conch. Sam., 



Ill, 1890, p. 187. 



Tropical Africa. 



Subgenus PSEUDOMUTELA Simpson, 1900. 

 (Type, Mycetopus i^Hoatus Sowerby. i) 



Shell rather thin, elongate, wide, round and gaping behind, cut away 

 and gaping at the anterior base; beaks low; surface rudely sulcate; a 

 series of irregular nodulous i^rojections extends down the low posterior 

 ridge; hinge edentulous, with a kind of faint, broken internal ligament, 

 with a wide prismatic streak behind; muscle scars distinct, united, the 

 anterior protractor, however, separated and irregular; nacre lurid 

 violet, iridescent behind. 



t MUTELA PLICATA Sowerby. 



" Mycetopus pUcatus Sowerby, Conch. Icon., XVI, 1868, pi. ii, fig. 3; Icon. XVI, 

 1868, pi. II, fig. 3.—* Fischer, .11. de Conch., XXXVIII, 1890, p. 8.— *P.etel, 

 Conch. Sam., Ill, 1890, p. 187. 



" Platiris (Mycetopus) pUcat^is Lea, Syn., 1870, p. 90. 



* Mutela pUcata Jickeli, Faun. Moll. N. Ost-Af., 1874, p. 270. 



Locality unknown, but Africa, no doabt. Sowerby credits it to 

 Gray's manuscript in the British Museum. 



1 This is certainly not a Mycetopoda, but is evidently nearer Mutela than anything. 

 I have placed it in that group as a subgenus, though it may be worthy of generic 

 rant. 



