PLACOSTYLUS, NEW CALEDONIA. 63 



Var. subuhtta: Bulimus pseudo-caledonicus, var. 7, CROSSE, J. de 

 C., xx, p. 193, 1867 Bulimus pseudo-caledonicus, var. nigra, GAS- 

 SIES, Faune, ii, p. 82, pi. 3, f. 7, 1871. 



Var. dentata : Bulimus pseudo-caledonicus, var. /3, GASST'RS-J- 

 Faune, ii, p. 81, pi. 7, f. 1, 1871. 



Var. pala: Bulimus pseudo-caledonicus, var. <?, GASSIES, Faune, 

 ii, p. 82, 1871. 



Var. rufa: Bulimus pseudo-caledonicus, var. }, GASSIES, Faune, 

 ii, p. 82, 1871. 



Var. incerta : Bulimus pseudo-caledonicus, var. ?, KOBELT, Conch. 

 Cab., Placostylus, p. 26, pi. 6, f. 3, 4, 1891. 



Var. hybrida : Placostylus pseudo-caledonicus, var. hybrida, KO- 

 BELT, Conch. Cab., p. 93, pi. 22, f. 6, 1891. 



Var. poumeana: Placostylus (pseudo-caledonicas, var.) Pouenanus, 

 KOBELT, Conch. Cab., p. 92, pi. 22, f. 4, 5, 1891. 



Easily distinguished from P. caledonicus, by the far less developed 

 callosities upon the outer lip and columella, and the absence or com- 

 paratively small development of the parietal tooth. 



Var. inter medius Crosse, 1867. Rather elongated and a little 

 larger, with 7 whorls. Length 73, diam. 42^ mill. Var. subulatus 

 Crosse (iiigra Gassies, pi. 31, fig. 11) is slender, a little smaller, with 

 7 whorls. Length 68, diam. 32 mill. Art Island. Var. dentatus 

 Gassies (pi. 31, fig. 14) has a small parietal tooth. Art Island. Var. 

 palus Gassies is gray, destitute of cuticle, with the aperture livid 

 violaceous. Art Island. Var. rufus Gassies, is covered with a yel- 

 lowish-brown cuticle, the suture white, generally with two zones and 

 ornamented with irregular lines. It is from Art Island, and may be 

 a form of P. scarabus. Var. incertus Crosse (pi. 10, figs. -28, 29), 

 " unites the marking and form of the last whorl of P. scarabus, the 

 form of the outer lip of P. caledonicus, and the characteristic concave 

 columellar fold of P. pseudo-caledonicus." Var. hybridus Kobelt (pi. 

 31, fig. 13) " differs from the type by its more ovate, not ovate-conic, 

 shell, lighter olive-brown epidermis, and subobsolete columellar fold 

 and callus of the outer lip. Alt. 57, diam. 33, apert. 35 mill." Var. 

 pouenanus Kobelt (pi. 31, fig. 12) has the mouth characters of 

 pseudocaledonicus, but differs markedly in the more cylindric spire, 

 want of oblique wrinkle-sculpture on the penultimate whorl, and it 

 lacks the characteristic color of the aperture, which in pouenanus is 

 light brown within, the peristome brownish, paler outwardly, or 



