74 MR. A. ADAMS ON THE LIOTIINjE OF JAPAN. [Feb. 10, 



3. Genus Morchia, A. Adams. 

 1. Morchia obvoluta, A. Ad., Ann. and Mag. Nat. Hist. 1860. 



Hab. Tsu-Sima, 26 fathoms ; Takano-Sima, in shell-sand. 



Obs. — M. Meyer has named a fossil genus of Vermetidse Morchia ; 

 and, in the last edition of Albers's 'Heliceen,' Von Martens has a 

 subgenus Morchia. Both these names, however, have been imposed 

 since I published the genus Morchia in the 'Annals' for I860. It 

 is a very curious little form, with an open mnbilicus, and with the 

 last whorl encroaching upon and nearly covering the others, as it 

 does in Neritula and Teinostoma. In fact, it bears the same relation 

 to Tubiola or Turbo niveus of Chemnitz that Teinostotna does to 

 Ethalia. 



Subgenus Tubiola, A. Ad. 



Testa subevoluta aut laxe voluta; anfractibus concentrice striatis, 

 rotundatis, simplicibus : apertura subcircularis, peritremate 

 continuo ; margine acuto, integro. 



There are several shells, such as Delphinula laxa. Say (which with 

 M. Fischer is a Skenea), Turbo niveus, Chemn. (which M. Philippi 

 says might just as well be considered a Skenea), and Skenea cornu- 

 ella, A. Ad., which cannot very naturally be received into any esta- 

 blished genus. I have therefore thrown them together under the 

 name Tubiola, on account of their resemblance to a little horn. 



1. Tubiola ntvea, Chemn. 



Turbo niveus, Chemn. Conch. Cab. vol. x. t. 165. f. 1587-8. 

 T. testa ovato-orbiculari, nivea, tenui, semipellucida, spira de- 

 pressa ; anfractibus rapide crescentibus, convexiusculis, concen- 

 trice creberrime liratis lineisque incretnenti decussatis, suturis 

 profundis, subcanaliculatis ; anfractu ultimo magno, antice di- 

 latato, ad peripheriam rotundato, ad peritrema contiguo ; 

 apertura perobliqua, subcirculari, postice angulata ; peritre- 

 mate continuo, simplici, acuto; umbilico peramplo, patulo, 

 perspectivo. 

 Hab. 0-Sima, on the sands. 



This shell agrees exactlj' with the original figure and description 

 of Chemnitz's Turbo niveus. The Delphinula Icevis of Kiener, or 

 D. nivea of Reeve, is quite different, and may be considered a Cy- 

 clostrema. The present shell is doubtless very rare. It is not in 

 Mr. Cuming's collection, nor have I seen it in any other. 



2. Tubiola cornuella, A. Ad. 



T. testa subdiscoidea, ovato-ohlonga, tenui, sordide alba, late 

 wnbilicata, apice elato ; anfractibus 3^, rapide accrescentibus, 

 rotundatis, ultimo ad peritrema soluto, striis incrementi ornate; 

 apertura perobliqua, transversim ovata ; 'peritremate continuo, 

 acuto, integro, expanso. 



Hab. Mino-Sima, 63 fathoms. 



In this species, which I described from a young individual as a 



