Appendix to Part II 613 



■well preserved the suture is scarcely distinguishable ; M. d'Orbigny 

 considers the S. Cruz species are certainly distinct. 

 Navidad, Chile ; Santa Cruz, Patagonia ? 



SCALARIA FvTTGULOSA. — PI. III. %S. 42, 43. 



Scalaria testa acuminato-pyramidali, crassiusculd,omnino rugulosd, 

 varicibus numerosis, crassis, rotundatis ; interstitiis spiraliter 

 obsolete sulcatis. 



Volutions about eleven or twelve, increasing very gradually 

 in size; with fourteen or fifteen rounded and thickish varices on 

 each. 



San Julian, Patagonia. 



Teo::htjs collaeis. — PI. III. figs. 44, 45. 



Trochus testa conicd, Icevi, anfractibus subcequalibus, tenuissime 

 transversim striates, postice prope suturas tuberculis minutis 

 seriatim cinctis, infra subconvexis, spiraliter tenuiter striatis ; 

 apertures angulo externo acuto : long. 0*45 ; lat. 0*55, poll. 



A very small portion of the outer surface remains, the inner 

 coat is wholly covered with a yellowish green and reddish irides- 

 cence. Umbilicus as far as I can judge the same as in the following 

 species, TV. Icevis. This may possibly be only a young shell of that 

 species, (and is so considered by M. d'Orbigny) as it is only distin- 

 guished by a row of very small tubercles placed immediately under 

 the suture, which may have existed in that species when young ; 

 and it must be observed that the first volutions are broken from 

 both the specimens of Tr. Icevis. 



Navidad, Chile, Santa Cruz, Patagonia. 



Tkochus l^svis. — PL III. figs. 46, 47. 



Trochus testd conicd, Icevi, anfractibus subcequalibus, postice turgi- 

 diusculis, antice tenuissime transversim striatis, infra subcon- 

 cavis, spiraliter tenuiter striatis ; aperturd rhomboided, angulo 

 externo acuto; umbilico mediocri, intus Icevissimo, labio interno 

 subincrassato ; long. 1*3; lat. 2', poll. 



The remains of the pearly inner coats are beautifully iridescent 

 in this species ; the outer surface is dull. 



Navidad, Chile. 



