102 JOl'RNAI. OF C0NCH01.0GY, Vni,. 9, NO. 4, OCTOBER, 1 898. 



and includes Margarita tutiiala Sow., Trochus bicolor Less., T. 

 lineatiis Phil, {non da Costa), T. hombroni P. Fisch., T. purpuratus 

 Forbes, Photina cxrulea, A. Ad., etc. It occurs also in Magellan's 

 Strait (Tryon). 



P. violacea King. — Seven specimens. A more conical shell than 

 P. cxpiUisj, with a smaller aperture, and of a purplisli-pink colour. 

 Its synonyms are Margarita persica A. (id., M. violacea King, M. 

 magdlanica H. J., Trochus violaceus Phil., and probably Margarita 

 viagellanica A. Gd., but Tryon is inclined to doubt the identity of 

 Gould's species with P. violacea. Recorded from Strait of Magellan 

 and Orange Harbour, Tierra del Fuego. 



Fissurella darwini Rv. — One dead, but characteristic example 

 of a form which appears to occupy an intermediate position between 

 F. picta Gm. and F. ?naxima Sow. It is more conical than the latter, 

 and less elevated than the former, and is sculptured with numerous 

 radiating ribs, which are low and uneven, but scarcely to be called 

 granose. The inside is white, with a blueish-black border. Recorded 

 from Strait of Magellan (Tryon). 



F. picta Gm. — Two full grown and typical examples of this hand- 

 some shell. Its recorded habitats are Strait of Magellan (U'Avila), 

 Chili and Valparaiso (D'Orbigny). 



F. polygona Sow. — Several typical specimens of this most beauti- 

 ful shell, which is distinguished by its scabrous strise and chain-like 

 ribs, usually rayed with purple. The inside is white, and the margin 

 spotted. None of the shells in this collection are quite as large as 

 the one figured by Sowerby, and one specimen is without colour, 

 though in the finest possible condition. 



F. mexicana Sow. — Four specimens. Tryon considers that the 

 locality given by Sowerby and Reeve ("Real Llejos, Mexico") needs 

 confirmation, and hints that it may be Sowerby's F. orietis ; but the 

 shells now before us are well distinguished from that species by the 

 finely decussated, close-set radiating grooves, and white-bordered 

 orifice. 



Puncturella (Cemoria) falklandica A. Ad. — One typical 

 example. Dall is doubtful whether this is separable from the British 

 P. fioachina, from which, however, it differs somewhat in its shorter 

 fissure and septum, more distant and equal ribs, and less posterior 

 apex. Recorded from west coast of Patagonia, in 449 faths. (Tryon). 

 Patella aenea Martyn. — A large and representative series of all the 

 principal varietal types acknowledged by Tryon in (</), typical P. eenea ; 

 {/>), var. deaurata Gm. ; (<:), var. magellanica Gm. The type is a 

 very solid shell, elevated, with strong radiating ribs, brownish ash- 

 coloured exteriorly, with a lustrous bronze-tinted interior, and seal- 



