collected in Japanese Seas. 105 



61. Diala simplex, sp. nov. 



Testa ovato-conica, lams, polita, tenuis, rufo-cornea ; anfractus 4| 

 convexiusculi, superne infra suturam linea obscura marginati; 

 apertura rotunde ovata, longitudinis totius circa % tequans ; 

 columella rectiuscula. 



Long. 2g mill., diam. 1^. 



Hob. Lat. 41° 12' N., long. 140° 45' E., in 43 fathoms, 

 sand and mud. 



This species is of a very simple structure. It has neither 

 longitudinal nor transverse sculpture, and consequently may 

 not belong to this genus ; for Adams, in the c Annals,' 1862, 

 vol. x. p. 298, in characterizing the genus, says " transversim 

 striata vel sulcata;" but, on the other hand, just below on 

 the same page, he describes a species (D. rujilabris) which 

 has smooth simple whorls. 



62. Diala tenuis, sp. nov. 



Testa ovato-conica, spira acuta, tenuis, pellucida, cornea, infra 

 suturam maculis runs ornata, interdumque lineis distantibus rufo- 

 articulatis cincta ; anfractus 6 convexiusculi, sutura subprofunda 

 disereti, incrementi lineis tenuissime striati; apertura ovata, 

 antice leviter effusa, longitudinis totius fere | sequans ; anfr. 

 ultimus ad peripberiam obtusim angulatus ; columella rectiuscula. 



Long. 4 mill., diam. 2. 



Hob. On a littoral species of Sargassum, North Japan. 



The nearest ally of this species appears to be 0. inflata, 

 A. Adams, from O-Sima. It is very remarkable that all the 

 numerous specimens of the present species which I have ex- 

 amined are covered with what, to an ordinary lens, appear to 

 be minute grains of sand, but which I believe are the egg- 

 capsules of something. Another peculiarity is that the majority 

 of the examples have a very minute species of Spirorbis attached 

 to them. In form it is very like Litiopa melanostoma. 



63. Cerithium (Vertagus) Kochi, Philippi, Abbildungen, iii. 

 [' Cerithium, pi. i. f. 3 ; Conch. Icon. f. 26, a, b. 



Hab. Matoza Harbour, 6 fathoms, sand. 



Philippi quotes " East Africa " as the habitat of this species ; 

 and there are examples in the Cumingian collection from 

 " St. Nicolas, Island of Zebu, Philippine Islands, 4 fathoms, 

 sandy mud (H. Cuming).'''' Most of the Japanese specimens 

 are more highly coloured than Reeve's figure represents the 

 species, many of the tubercles being brown. 



