NERITINA (CLITHON) SUBOCELLATA. 49 



NOTE X. 



NERITINA (CLITHON) SUBOCELLATA, 

 V. MARTENS, MS. 



11ESCRIBED BY 



M. M. SCHEPMAN. 



(Plate 4, fig. 3, 3 a and 3t). 



With the species of the Genus Neritina , which I receiv- 

 ed for revision from the Leyden Museum of natural his- 

 tory , I found three specimens of this form , which Prof, 

 von Martens, after specimens in my own collection , thought 

 to be new and named it suhocellata ; but as far as I know 

 it has not yet been described. With the approbation of 

 the Conservator of the conchological department of the 

 Museum I will now give a description. 



Shell nearly globular , delicately striated in the line of 

 growth, with a few striae in the form of folds near the 

 suture , and with microscopic spiral striae. The colour is 

 greyish olive-green, with small blackish spots, which are 

 rounded or triangular, sometimes flow together and vary 

 greatly in size and number; they are mostly bordered by 

 a very small rim of a lighter colour. The last whorl is 

 more or less angular above and shows there from one to 

 four spines in some examples, others are entirely spine- 

 less, but show still traces of them on the penultimate 

 whorl and one is quite destitute of spines. The spines are 

 short , curved upwards and sometimes a little backwards. Spire 



Notes irom the Leyden ]VIu.seuxzi, "Vol. "VII. 



4 



