collected in Japanese Seas. 1 13 



87. Dental 'turn sexcostatum } Sowerby, Thes. Conch, 

 vol. iii. pi. 223. f. 11. 



Hah. Cape Sima, 18 fathoms, bottom sand and broken 

 shells ; Goza Harbour, 6 fathoms, sandy mud. 



This fine species, the habitat of which has not been recorded 

 previously, is closely allied to, if not identical with, D. liexa- 

 gonnm, Gould, from Hong Kong. The chief difference in 

 the latter species appears to be the lack of sculpture between 

 the angles, and the slightly narrower form. 



88. Dentalium octogonum } Lamarck ; Sow. Thes. Conch, 

 vol. iii. pi. 223. f. 9. 



Hab. Matoza Harbour, 6 fathoms, sand ; Ooshima Harbour, 



8 fathoms ; and lat. 35° V N., long. 136° 55' E., 3 fathoms. 



89. Dentalium semi])olitum } Sowerby, Thes. Conch, vol. iii. 

 pi. 224. f. 23. 



Hab. Cape Sima, 18 fathoms; Matoza Harbour, 6 fathoms. 



90. Cylichna pertenuis 7 sp. nov. 



Testa parva, leviter umbilicata, tenuissima, sordide albida, pyriformi- 

 cylindracea, ad verticem exigue perforata, parum nitida, longitu- 

 dinaliter tenuissime et confertissime arcuatim striata; apertura 

 superne perangusta, super verticem leviter producta, ad basim 

 dilatata ; columella rectiuscula, aliquanto incrassata, versus umbi- 

 licum paululum reflexa. 



Long. 3g, diam. fere 2 mill. 



Hab. Lat. 42° 52' N., long. 144° 40' E., in 48 fathoms, sand 

 and mud ; temperature 37° to 39°. 



The longitudinal striation is very minute, and only visible 

 under a powerful lens. The form is scarcely sufficiently pyri- 

 form to warrant me in placing this species in the subgenus 

 Sao, 



91. Cylichna concinna, A. Adams, Thes. Conch, vol. ii. 

 p. 593, pi. 125. f. 142. 



Hab. Matoza Harbour, 6 fathoms, sand. 



A single specimen, agreeing in every particular with the 

 type of this species, with which it has been compared, measures 



9 millims. in length, 3f in width. 



Ann. & Mag. N. Hist. Ser. 4. Vol. xvi. 8 



