TROCHUS FILIFERUS. 99 



NOTE IV. 

 NOTES ON TROCHIDAE 



BY 



M. M. SCHEPMAN. 



(Plate 8). 



1. A new Trochus. 



Trochus (Lamprostoma) jiliferus, n. sp. 



Shell conic, solid, falsely urabilicate, embryonic whorls 

 wanting, of the 8 remaining whorls the four upper ones 

 are nearly strictly conic, the fifth is slightly, the sixth to 

 eighth strongly constricted at the upper, convex towards 

 the lower part, the last carinated at the periphery, with 

 a flat base, which is however slightly convex towards the 

 aperture ; the colour of the shell is white, often with a 

 rosy tinge , with irregular rather broad flames of dark 

 rose on the upper part, where the flames are now broader 

 now narrower than the interstices ; on the base the flames 

 are less dark and generally narrower, especially towards 

 the umbilicus ; the sculpture of the upper whorls consists 

 of five beaded lirae of which the upper and lower ones 

 are the strongest, with the beads less round; a very small 

 intermediate one runs below the uppermost of the lirae. 

 On the latter whorls these beaded lirae become indistinct 

 and disappear by the confluence of the lirae; these whorls 

 are covered by radiating unequal threads, running in a 

 diagonal direction, opposite to the lines of growth; the 



Notes from the Leyden Maseum, Vol. XXV. 



7 



