1879.] MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. 215 



shell is divided into two parts, the upper, with the exception of 

 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. fif;s. G21, 622 (merely 

 caricatures) ; Smith, Annals and Ma». Nat. Hist. 1875, vol. \v. 

 p. 425. 



Hub. Station 9. Also Kino-o-Sima {A. AdX Ooshima and JMatoza 

 {Capt. St. John). 



This species has four plicce 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 



costEe and consequently narrower interstices, white, stained with light 

 purplish brown at the inferior margin of the upper whorls, and witli 

 the lower half of the last of the same colour ; apex also stained with 

 brown: whorls 9, a trifle convex; costae 18 on a whorl, slightly 

 arcuate ; interstices transversely sulcated ; sulci six to seven on the 

 penultimate wliorl, and about sixteen on the last ; columella qua- 

 druplicate ; aperture small, internally lirate, white at the margin of 

 the lip. 



Length 13i millims., diam. 4 ; length of aperture 5. 



Hab. Station 7. 



84. Mitra (Pusia) ^mula. (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, 

 aiid 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 costfe, about fourteen in number 

 on tha penultimate volution, attenuated and obsolete just before the 

 five oblique stoutish hrse encircling the cauda ; interstices smooth, 

 about as broad as the ribs. Aperture small, dark brown, with two 

 yellow transverse lines, lirate 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. 



