MELVILL AND STANDEN : MARINE SHELLS FROM LIVELY LSLAND. IO3 



loped margin. P. gmidichandi Blainv. is a synonym. The var. 

 deaurata is chiefly distinguished from the type by the thin, oblong, 

 depressed shell, showing dark-brown radiating stripes interiorly, and 

 the apex curving forward. Patella cymluilaiia Del., P. fcrriigmea 

 Sow., P. delesserti Phil, P. varicosa Rv., and N'acella strigatella 

 Roch. & Mab., are also synonyms. Tryon also considers that P. 

 polaris Marts. & Pfr. is merely a form of P. deaurata, and that 

 P. varicosa Rv. is identical with \Voods' & Gmelin's P. flanimea. 

 Var. magellanica Gm. is of a rounder form than typical P. <riiea, and 

 has a more central, erect, and elevated apex. Variations of this form 

 have been described by Reeve, under the names of P. atramentosa, 

 P. venosa, and P. chiloensis, whilst Rochbr. & Mab. coin many species 

 from it. Both typical P. cenea and the vars. deaurata and magell- 

 anica have hitherto only been recorded from Strait of Magellan. 



Acmaea textilis A. Gd. — Six specimens. This species seems to 

 possess good and distinctive specific characteristics, although in- 

 cluded by Tryon in the synonymy of A. persona Eschz., an exces- 

 sively variable species, which ranges from Sitka to Turtle Bay, Lower 

 California. 



Scurria SCurra (Less.). — A very fine example of this has been 

 added to the collection through the kindness of Prof D'Arcy Thomp- 

 son. It was collected by Mr. J. Cooper, in 1893, and is of the 

 somewhat depressed terraced form figured by Tryon. ^ The range of 

 this species is given by Tryon as extending from 12° to 41° S. Lat., 

 west coast of South America. Its synonyms are Patella scurra Less., 

 Acmcea scurra D'Orb., Lottia pallida Sow., Lottia conica A. Gd., and 

 Acmcea cymhula Hupe. 



Nacella cymbularia Lm. — Three specimens, of a pale horn 

 colour, with silvery iridescent interior. Tryon restricts Nacella to 

 one species : N. mytilina Helbl., which lives upon the great seaweeds 

 of the Tierra del Fuego shores, and he includes N. cymbularia 

 amongst its numerous synonyms. 



Chiton (Plaxiphora) setiger King. — One typical example of 

 this well-known South American species. 



Lima falklandica A. Ad. — One perfect specimen, together with 

 odd valves of a very delicate shell with some affinity to Z. loscombi 

 Sow. 



Pecten (Pallium) corneus Sow. — Valves only. The typical 

 form. Recorded from Strait of Magellan. 



P. rufiradiatus Rv. — Many valves, distinctively representative of 

 the species. It is recorded from Strait of Magellan by Reeve, and 

 is a characteristic form of the type of Pecten peculiar to that locality ; 



I Man. Conch., vol. 13, pi. 39, figs. 26-27. 



