292 APPENDIX. 



Fiss. BRUNNEA Anton (Verzeich, p. 27) unidentified. 



F. ROSEA Lam., add to synonymy ; F. rosacea ANTON, Verz., p. 27. 



Fiss. NUBECULA L. F. mondelloensis de Greg. (Bull. Soc. Mai. 

 Ital., x, p. 222) is a synonym. 



FISSURELLA ROBUSTA Sowerby, 2d. 



Shell elevated, solid, brown, smooth or obsoletely concentrically 

 corrugated ; front slope short, posterior swollen ; perforation mod- 

 erate, oval, situated at } of the length. Length 40, diam. 34, alt. 

 25 mill. This shell lent me by Mr. Ponsonby is in a very worn 

 condition, so that it is impossible from it to give a full description 

 of the species ; but it is of a peculiar, robust and elevated form, and 

 its surface appears to be nearly smooth without any signs of radi- 

 ating ridges (Sows. Journ. of Conchol., Leeds, vi, p. 12, t. 1, f. 5, 6, 

 Feb., 1889). 



FISSURELLA FLAVIDA Philippi. Unfigured. 



A species of true Fissurella, allied to F. fulvescens Sowb. 



F.flavida PH., Mai. Bl., iii, p. 165, 1857. 

 FISSURELLA ALBA Philippi. PI. 62, figs. 3, 4, 5. 



Shell small, rather convex, white all over, nearly smooth, but 

 sculptured with close impressed radiating lines and growth striae ; 

 foramen oblong, subcentral, extremities incumbent; margin very 

 delicately crenulated. Length 10, lat. 6J, alt. 41 lines. (Ph.) 



Straits of Magellan. 



F. alba PH., Archiv. f. Naturgesch. 1845, p. 61 ; Abbild., p. 34, 

 Fiss., t, 1, f. 4. 



FISSURELLA OBLONG A Menke, Moll. Nov. Holl., p. 33. This is 

 probably Megatebennus trapezina Sowb. See Tate, Proc. Linn. 

 Soc. N. S. Wales, vi, p. 411. 



MACROSCHISMA BAIKIEI A. Adams. (P. 194.) 



The name of this species is incorrectly spelled by Sowerby (see 

 antea, p. 194). Add to references: Clypidella Baikiei A. AD., P. 

 Z. S. 1854, p. 136, t. 28, f. 3. 



GLYPHIS IMPEDIMENTUM Cooke. Unfigured. 



This remarkable shell is of the same type as arcuata, Sow. The 

 noteworthy features are the extreme elevation, the very gibbous 

 form, and the fact that the apex, which is not at all prominent, is 



