194 GASTROPODA. [Pectinibranchia. 



1. Planaxis brazilianus, Lamarck, 1822. Plate 38, fig. 29. 



Buccinum brasilianum, Lam., A.s.V., vii, 272. Planaxis brazilianus, Lam. : 

 Hedley, P.L.S. N.S.W., 1904, 186; Conch. Icon., xx, f. 35. P. mollis, 

 Sowerby, Gen. of Shells, pt. 12, pi. 219, f. 2; Man. Conch. (1), ix, 27!. 

 pi. 52, f. 34, 35 ; Suter, T.N.Z.I., xxxviii, 328. Biiccinumlcevigatum, Wood, 

 Index Test., sup. 13, pi. 4, f. 29a. Planaxis pigra, Forbes, P.Z.S., 1850, 

 273, pi. 11, f. 5. P. fulva, A. Ad., P.Z.S., 1851, 271. P. mollis, Sow. : 

 Pritchard and Gatliff, P.R.S. Vic., xiv (n.s.), 87. 



Shell small, oval-conic, solid, imperforate. Sculpture consisting 

 of a few narrow grooves at the base around the neck. Colour yellow 

 or yellowish-brown. Epidermis minutely pilose, dull, mostly worn off 

 on the upper whorls. Spire elevated conical, a little higher than the 

 aperture, outlines straight. Protoconch small, conic and obtuse, of 

 2 smooth white whorls. Whorls 7, first regularly, then rapidly in- 

 creasing, flatly convex, the last rapidly descending on approaching 

 the aperture ; base slightly concave. Suture not impressed. Aper- 

 ture oblique, oval, with a narrow sinus at the base. Outer lip rounded, 

 much thickened inside by a white, shining, and grooved callus. Colu- 

 mella slightly oblique, moderately excavated. Inner lip forming a 

 white rounded callosity, which spreads over part of the body and is 

 connected with the outer lip. Operculum normal. 



Diameter, 7 mm. ; height, 14 mm. (Kermadec specimen). 



Animal unknown. 



Type in the Mus. Hist. Nat., Geneva. 



Hob. Bay of Islands ; Kermadec Islands (Miss Robison). Aus- 

 tralia and Lord Howe Island. 



Remarks. -The specific name is a misnomer, as this shell does not 

 occur on the coast of Brazil. Personally, I am strongly opposed to the 

 use of such names, but the rule of zoological nomenclature is very 

 clear on this point, and we have to obey it, meanwhile hoping that it 

 may be altered some day. 



Fam. REALIID^J, Kobelt and Moellendorff. 



Shell small, variously shaped ; operculum oval, horny, cartilaginous 

 or calcareous, having an excentric nucleus and few whorls. 

 Distribution. Indo-Pacific. 



Subfam. REALIIN.E. 



Realiince, Kobelt, " Synopsis der Pneumonopomen-Familie Realiida?," in 

 Jahrb. Nassau. Ver. f. Naturk., lix, 1906, 45. 



Shell small, turriculate, globosely turriculate or conoidal ; oper- 

 culum horny. 



This subfamily includes the five genera Realia, Gray ; Ompha- 

 lotropis, L. PfeifEer ; Acmella, Blanford ; Cyclomorpha, Pease ; and 

 Dacrystoma, Crosse and P. Fischer. 



Distribution.- Madagascar to New Zealand and Tahiti. 



