316 GASTROPODA. [Pectinibranchia. 



1. Architectonica Reevei, Hanley, 1862. Plate 44, fig. 16. 



Solarium Reevei, Hani., P.Z.8., 1862, 204 ; Thes. Conch., iii, 234, pi. 250, 

 f. 9, 10 ; Conch. Icon., xv, pi. 3, f. 20 ; Angas, P.Z.S., 1867, 201 ; Chall. 

 Rep., xv, 136; Man. Conch. (1), ix, 12, pi. 4, f. 45, 46. Solarium 

 modesta, Phil. : Cooper, T.N.Z.I., xxxi, 137 ; not of Philippi. 



Shell conoidal, solid, flesh-colour, with brown spots. Sculpture : 

 Whorls spirally unisulcate or bisulcate near the suture, ribbed at the 

 periphery, spirally sulcate and ribbed above and below the periphery 

 and near the umbilicus, ribs finely crenulated, entire surface of the 

 shell covered with close, obliquely radiating growth-lines. Colour 

 pinkish-flesh with interrupted orange-brown bands below the suture. 

 on the ribs about the periphery, and finer bands near the middle 

 of the whorls. Spire conoidal, about twice the height of the aperture ; 

 outlines slightly convex. Protoconch small, convex, reddish-brown, 

 of 2 convex whorls, the first smooth, the second finely spirally striate. 

 Whorls about 6, regularly increasing, but little convex, the last 

 sharply carinated ; base flat. Suture inconspicuous. Aperture sub- 

 quadrangular, slightly oblique. Peristome discontinuous, sharp. Colu- 

 mella vertical, straight, rounded, and callous, truncate below. Um- 

 bilicus rather narrow', diameter a little over one-fourth of the minor 

 diameter of the shell, deep, perspective, with crenulated white margin. 



Diameter, 22 mm. ; height, 14 mm. 



Animal unknown. 



Type in the British Museum. 



Hob. Whangarei Heads (C. Cooper). Tasmania and Australia 

 (Port Jackson). 



The " Challenger " specimens were found in depths from 2 to 10 

 fathoms. 



Subgen. 2. PHILIPPIA, Gray, 1840. 



Philippia, Gray, in Philippi, Enum. Moll. Sicilian, i, 174 ; P.Z.S., 1847, 146. 

 Type : Solarium luteum, Lam. Disculus, Deshayes, 1863. 



Shell without radial sculpture, spiral sculpture nearly obsolete. 

 Operculum flattened ; whorls numerous, with the nucleus subcentral ; 

 internal face bearing a subspiral calcareous process. 



2. Architectonica lutea, Lamarck, 1822. Plate 46, fig. 4. 



Solarium luteum, Lam., A.s.V., vii, 1822, 5 ; Thes. Conch., iii, 237, pi. 253, 

 f. 52-54; Conch. Icon., xv, pi. 3, f. 14; Man. Conch. (1), ix, 16, pi. 5, 



f. 71, 72. 



Shell small, rather thin, conical, periphery spirally ribbed. Sculp- 

 ture : A fine smooth spiral thread above the suture, and 2 cinguli on 

 the periphery ; base spirally finely striated ; umbilical margin crenu- 

 lated ; growth-lines oblique and fine. Colour yellowish, with bands 

 of very fine brown dots on the cinguli above the suture and on the 

 periphery ; umbilical crenulations white. Spire conical, a little higher 

 than the aperture ; outlines a little convex. Protoconch minute, mostly 



