284 PHOTINULA. 



ovate-subtriangular, pearly inside, and mor6 or less zoned with green 

 lines ; margins joined by a very thin fulvescent lamina ; outer mar- 

 gin at first nearly straight, then curved, columellar subthickened, 

 very narrowly calloused at the insertion, joining the basal margin 

 in an obtuse angle ; columella elongated, intorto-curved. 

 Alt. 7, diam. maj. 13, min. 11 mill. {R. & 3L, I. c, p. 107.) 



Punta Arenas, Patagonia. 



Photinula paradoxa Rochebrune et Mabille. 



Shell orbicular-conic, covered imperforate, thin, solid, subdiaph- 

 anous, grayish-ruddy or white, zoned with red lines or unicolored, 

 smooth, finely striate under a lens ; whorls 6, a little convex, piano- 

 depressed at the suture, rapidly increasing, separated by a linear sub- 

 margined suture, the last largest, depressed rotund, at the periphery 

 scarcely obtusely angled, impressed around the closed umbilicus, 

 at the aperture scarcely descending ; aperture oblique, lunate, trans- 

 versely ovate, above scarcely angled, at the base rounded ; columella 

 decidedly arcuate, emitting a white callous which closes the umbili- 

 cus and is bipartite by a sulcus. 



Alt. 6-7, diam. maj. 11-13, min. 9-11 mill. {R. & 31., I. c, p. 107.) 



South of Cape Horn. 



Photinula halmyris Rochebrune et Mabille. 



Shell imperforate, globose-conic, rather thin but solid, shining, 

 whitish or reddish, vivid green at summit, smooth ; spire conical, 

 apex very minute, subpapillar, acute ; whorls 6, convex, sensibly 

 increasing, separated by an impressed suture ; last whorl large, con- 

 vex-sloping, obtusely carinate at base, subplanulate beneath, deeply 

 descending at the aperture ; aperture slightly oblique, lunate, trans- 

 versely ovate, above narrowly acute, below produced-rounded ; colu- 

 mella well arched, a little thick, emitting a very narrow white 

 callous which covers the umbilicus ; outer margim at first nearly 

 straight, then well arched, acute, scarcely thickened. 



Alt. 7-8, diam. maj. 10-11, min. 9-10 mill. (R. & M., /.c.,p. 108.) 



Beagle Channel. 



P. viaginalis, hyadesi, detecta, resurrecta and pruinosa have 

 decussated surface and may perhaps prove to be varieties of one 

 species. All published information upon these forms is given in the 

 above translations of the original diagnoses. 



