NO. 1205. SYNOPSIS OF THE JSTAIADES— SIMPSON. 903 



dorsal scars an irregular row, extending downward and forward; 

 nmsclo scars irregular. 



Animal liaving the palpi longer than wide, not united; mantle mar- 

 gin united as far as the foot, so that the branchial and anal openings 

 are closed; outer branchiae united to the mantle to the extremity; inner 

 entirely united to the foot; foot tongue shaped, somewhat produced 

 anteriorly. Iriclina ccvlestis Lea (Troschel.) 



(Group of Mutela exotica.) 



Shell elongate, rhomboid, wider and subtruncated behind, subsolid. 



t MUTELA EXOTICA Lamarck. 



"* Iriclina exotica Lamarck, Ad. sans Vert.,YI, 1819, p. 89; *Enc. M^tli., II, 1827, 

 p. 147, pi. ccxv, fig. 1, 11) ; * Stark, Nafc. Hist., II, 1828, p. 88.—* Lea, Syn., 1836, 

 p. 56. — *Hanlev, Biv. Shells, 1843, p. 225. — * Catlow and Reeve, Couch. 

 Nom., 1845, p. 68.— "^ Sowerby, Conch. Icon., XYI, 1868, pi. i, fig. 2.—* Cles- 

 SIN, Conch. Cab. Ano., 1875, p. 231, pi. lxxi, fig. 1. 



* Anodorda exotica Blainville, Man., 1825, p. 538, pi. lxvi, fig. 3. 



* Platiris {Iriclina) exotica Lea, Syn., 1838, p. 33; 1852, p. 54; 1870, i>. 88. 

 ^ Pleiodon exoticus P.etel, Conch. Sara., Ill, 1890, p. 188. 



* Iridiiia elongata Sowerby, Eec. and Fos. Shells, YII, 1821, fig. 1.' — * Oken, Isis, 



1834, p. 458.— * Sowerby, Couch. Man., 1839, fig. 150.— * Swainson, Tr. on 

 Mai., 1840, p. 286, fig. 60.—* Reeve, Conch. Syst., I, 1841, p. 122, pi. xcii.— 

 * Hanley, Biv. Shells, 1843, p. 225. — * Catlow and Eeeve, Conch. Nom., 1845, 

 p. 68.—* Sowerby, Conch. Icon., XVI, 1868, pi. i, fig. 1. 

 ^Platiris (Spaiha) elongata Lea, Syn., 1838, p. 34. 



* Mutela elongata P^etel, Conch. Sam., Ill, 1890, p. 187. 

 ^ Iridina striata Oken, Isis, 1834, p. 458. 



* ? Mutela soleniformis Bourguignat, Es]3. Ouk., 1885, p. 25. — * Pelseneer, Bull. 



Mus. Belg., IV, 1886, p. 109.—* Bourguignat, Icon. Mah, 1888, pi. xxii, fig. 

 2.—* VON Martens, Besch., 1897, p. 254. 



* ^Mutela hridouxi Bourguignat, Uu. et Ir., 1886, p. 25; *Icon. Mai., 1888, pi. 



XXII, fig. 1. 



Tropical Africa. 



t MUTELA DUBIA Gmelin. 



Le Mutel Adanson, Hist. Nat. du Sen., 1757, p. 234, pi. xvii, fig. 21. 



""Mgtilus duhia Gmelin, Syst. Nat., 1788, p. 3368. ^ 



"" Anodonta duhia Bosc, Hist Nat. Coq., Ill, 1824, p. 144. 



* Platiris (Spatha) duhia Lea, Syn., 1852, p. 55; 1870, p. 89. 



^Mutela duhia H. and A. Adams, Gen. Eec. Moll., II, 1857, p. 506, pi. cxix; III, 

 figs. 1, la. — *Clessin, Conch. Cab. Ano., 1873, p. 194, pi. xxv, fig. 3. — 

 *P^TEL, Conch. Sam., Ill, 1890, p. 187. 



""Iridina duhia Chexu, Man., 1859, II, p. 147, fig. 726. 



" Mytilus duhius Dillwyn, part. Cat., I, 1817, p. 318. — * Wood, lud. Test, rev., 

 1856, p. 69, pi. XII, fig. 36. 



West Africa. 



' I agree with Lea that this = exotica. The teeth are not strongly developed. 



- Gmelin refers to Adanson's figure. Dillwyn evidently has Gmelin's species and 

 Cristaria plicata from China confounded. Two or three of these so-called species of 

 Mutela are very close, and large series from different localities would probably show 

 that they run together. There is much variation in the form and the develop- 

 ment of hinge tubercles, even in a single species from a given locality. 



