MR. A. ADAMS ON JAPANESE GASTEBOPODS. 91 



Subgenus Mucronalia, A. Ad. 



Testa subulata, recta, pupoidea, vertice obtuso, apice subito nmcro- 

 uata ; anfractibus siuiplicibus. Ajjertura oblonga. 



1. Mucronalia bicincta, A. Ad. Annals, 1860. 

 Hab. Mino-Sima, 63 fathoms. 



2. Mucronalia exilis, A. Ad. Annals, 1861. 

 Hab. Seto-Uchi (Mososeki). 



3. Mucronalia lactea, A. Ad. 



' M. testa subulata, pupoidea, vertice obtuso, mucrone parvo brevi, lactea, 

 vixopaca; anfractibus uormalibus 4, planis, suturis impressis; aper- 

 tura obliqua, oblonga, antice dilatata et producta. 

 Hab. Tanabe. 



A milk-white pupoid species, with the aperture very oblique and pro- 

 duced. 



4. Mucronalia subula, A. Ad. 



M. testa subulata, nivea, vix opaca, pupoidea, vertice obtuso, mucrone 

 parvo; anfractibus normalibus 6, planis, suturis impressis; apertura 

 uormali, oblongo-ovata. 



Hab. Simoda. 



Like M. lactea, but lai'ger, with more numerous whorls, and the aperture 

 not produced nor oblique as in that species. 



Subgenus Selma, A. Ad. 



Testa oblongo-ovata, tenuis, subdiaphana, spira brevi, anfractu ul- 

 timo magno. Apertura elongato-ovata, antice iutegra ; labio 

 arcuato, oblique subplicato. 



1. Selma succiniola, A. Ad. 



S. testa elongato-ovali, teuui, rimata, subdiaphana, cornea, rufo tincta, 

 spira brevi ; anfractibus 3|, vix convexis, ultimo amplo ; apertura ob- 

 longa ; labio rufo tincto, plica subtortuosa rufa instructo, labro margine 

 simplici. 

 Hab. 0-Sima. 



I have been necessarily obhged to keep this species distinct from the 

 others on account of its short spire and the spiral twist on the inner lip. 

 The only specimen I obtained is a little Succinia-sha\)ed shell, and, were it 

 not for the aperture being entire in front, might be taken for a very young 

 Olivella. 



On the Species of Eostriferous Gasteropods {Stromhida, Tricho- 

 tropidw, Ci/prceidce, and Ampkiperasidce) found in Japan. By 

 Arthur Adams, F.L.S., &c. 



[Read January 15, 1863.] 



The species of Stromhidce collected by me during the recent ex- 



