GASTROPODA (PECTINIBRANCHIA). 
155 
MiTRIDjE. 
Mitra. Sowerby’s monograph of this genus, Thes. Conch, pts. xxxi. 
& xxxii. (1874) pis. ccclii.-ccclxxix. contains 494 species and 1 Dihaphus^ 
all figured, arranged in 13 sections. Latin diagnoses only are given for 
the new species, the others are only characterized by a few words, or are 
without any description. The following are new : — 
Sect. 1. (Type, M. episcopalis) : mauritiana^ sp. n., p. 2, pi. ccclxxviii. 
fig. 610, Mauritius. 
Sect. 2. (Type, M. zonata) : fergusoni, sp. n., p. 3, pi. ccclvii. figs. 70 & 
71, Panama ; alho-fasciata, sp. n., p. 4, pi. ccclxvii. fig. 300, South Africa ; 
abbreviata^ new name for nigra of Reeve, nec Quoy and Gaimard, New 
Zealand, p. 5, pi. ccclxviii. fig. 328 ; simplex, sp. n., p. 6, pi. ccclxxv. 
fig. 528 ; tenuis, sp. n., p. 6, pi. ccclxviii. fig. 327 ; insolata, sp. n., p. 7, 
pi. ccclxxix. fig. 650. 
Sect. 3. (Granulated or scabrous) : novce-hollandim, sp. n., p. 9, 
pi. ccclxx. fig. 368, and pi. ccclxxi. fig. 417, New Holland; crebrilirata, 
sp. nr, p. 9, pi. ccclxxviii. fig. 626, Mauritius •, acutilirata, sp. n., p. 16, 
pi. ccclxvi. figs. 273 & 274 ; semiconica, sp. n., p. 10, pi. ccclxxviii. 
fig. 619. 
Sect. 4. (Spirally ridged) : clara, sp. n., p. 11, pi. ccclxxix. fig. 652 ; 
minor, sp. n., p. 12,’ pi. ccclxxix. fig. 662 ; hanleyi,Bp.n. p. 12, pi. ccclxxix. 
fig. 661, China Seas ; subrostrata, sp. n., p. 13, pi. ccclxvii. fig. 297, Sand- 
wich Islands ; indentata, sp. n., p. 13, pi. ccclxxi. fig. 412. 
Sect. 5. (Acorn -shaped) : lima, sp. n., p. 13, pi. ccclxix. fig. 353 ; 
radula, sp. n.,'p. 14, pi. ccclxix. figs. 358 & 359; arctata, Sp. n., p. 14, 
pi. ccclxviii. figs. 316 & 317, Australia or Central America, 
Sect. 6. (Conical) : strigillata, new name for bacillum, Reeve, nec 
Lamarck, p. 14, pi. ccclxv. figs. 248 & 249. 
Sect. 7. (Type, M. ziervogeliana') : no new species. 
Sect. 8. (Narrow, cancellated, or granular) : foveata, sp. n., p. 16, 
pi. ccclxxi. fig. 408; roseata, sp. n. ?, Brit. Mus. p. 16, pi. ccclxxix. 
fig. 664 ; cernica, sp. n., p. 16, pi. ccclxxix. fig. 670, Mauritius ; angus- 
tata, sp. n., p. 17, pi. ccclxxix. fig. 611, Mauritius. 
Sect. 9. (Outer lip shortened and recurved) : dibaphiformis, new name 
for Mauritia barclayi (H. Ad.), p. 17, pi. ccclxviii. figs. 309 & 310, Mauri- 
tius ; telum, sp. n., p. 17, pi. ccclxxviii. figs. 613 & 614, Mauritius \ petrosa, 
sp. n., p. 18, pi. ccclxviii. fig. 314. 
Sect. 10. (Columbelliform) : marginata, sp. n., p. 19, pi. ccclxviii. 
fig. 311 ; floridula, sp. n., p. 20, pi. ccclxvii. fig. 283, and pi. ccclxxviii. 
fig. 611, Mauritius ; crassicostata, sp. n., p. 21, pi. ccclxx. fig. 387 ; cre- 
tacea, sp. n., p. 21, pi. ccclxxvii. figs. 577 & 578, Mauritius ; microstoma, 
sp. n., p. 21, pi. ccclxvii. fig. 291 ; nassoides, sp. n., p. 22, pi. ccclxxviii. 
fig. 631, Mauritius. 
Sect. 11. (Small, short, outer lip not compressed) : picea, sp. n. ?, 
Brit. Mus., p. 22, pi. ccclix. fig. 658 ; medio-maculata, sp. n., p. 23, 
pi. ccclxxiii. fig. 472, Mauritius ; trunculus, sp. n., p. 23, pi. ccclvii. 
fig. 319 ; nigro-fasciata, sp. n., p. 23, pi. ccclxxiii. fig. 468 ; loevizonata. 
