OCR Text |
Show 1879.] MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. 216 shell is divided into two parts, the upper, with the exception the brown apex, being white or bluish white, and the lower ashy brown. 82. MITRA (COSTELLARIA) COLLINSONI, A. Adams. (Plate XX. fig. 50.) Mitra {Costellaria) collinsoni, A. Adams, Journal Linn. Soc. 1864, vol. vii. p. 200 ; Sowerby, Thes. Conch, figs. 621, 622 (merely caricatures) ; Smith, Annals and Mag. Nat. Hist. 1875, vol. xv. p. 425. Hab. Station 9. Also Kino-o-Sima (A. Ad.), Ooshima and Matoza (Capt. St. John). This species has four plicae on the columella, and not three as stated by Adams. In the white zone which occupies the lower half of the whorls there is a brown line interrupted by the costella?, in this respect agreeing with M. bronni, Dunker, which is known to me only by the description, from which it appears to be a stouter shell. 83. MITRA (COSTELLARIA) GOTOENSIS. (Plate XX. fig. 51.) Shell like the preceding species (M. collinsoni) ; but with thicker costa? and consequently narrower interstices, white, stained with light purplish brown at the inferior margin of the upper whorls, and with the lower half of the last of tbe same colour ; apex also stained with brown : whorls 9, a trifle convex; costa? 18 on a whorl, slightly arcuate ; interstices transversely sulcated ; sulci six to seven on the penultimate whorl, and about sixteen on the last ; columella quadruplicate ; aperture small, internally Urate, white at the margin of the lip. Length 13^- millims., diam. 4 ; length of aperture 5. Hab. Station 7. 84. MITRA (PUSIA) ^EMULA. (Plate XX. fig. 52.) Shell fusiformly ovate, blackish brown, with a narrow yellow line round the middle of the whorls, and yellow at the upper margin, and a second line on the last whorl rather below the middle ; clothed with an olive epidermis obscuring the colouring : whorls 8, slightly convex, with stoutish longitudinal costae, about fourteen in number on the penultimate volution, attenuated and obsolete just before the five oblique stoutish lira? encircling the cauda ; interstices smooth, about as broad as the ribs. Aperture small, dark brown, with two yellow transverse lines, Urate far within ; columella armed with four plicae and a slight callus at the upper extremity. Length 12 millims., diam 4^ ; length of aperture 5^. Hab. Station 7. This species is allied to 31. analogica, Reeve, but differs in the length of the spire and aperture, width and position of the yellow zones, and the continuation of the ribs upon the body-whorl. |