272 MONILEA-MINOLIA. 



Alt. 0-275 in. diam. 0-33, least 0-3 in. Mouth, height O'lS, breadth 

 0-14 in. ( Watson.) 



There is a Margarita tasmanica of Tenison-Woods, from Bass 

 Straits, which from his description, seems to present some features of 

 resemblance to this species ; but he says of it that the upper part of 

 the whorl is not angulated. Then Trochus (tSolariella) prodictus, 

 Fisch. (=^ angulatus, A. Ad.). This Port Philip species is much 

 larger and higher. It approaches most nearly to T. bellula, Ang. ; 

 but that is larger, with the same number of whorls, has a transpar- 

 ently white apex, has the shoulder below the apex not flat nor 

 drooping outwards, but gouged out as a concave depression ; the last 

 whorl is more spread out, and the base is without color, the umbili- 

 cus is wider and less deep, and the spiral which defines it is stronger, 

 while there are no other spirals within it ; the whole surface of the 

 shell, too, is smooth, with a few strong clean-cut impressed spirals, 

 instead of being closely and minutely fretted with spirals all over. 



( Watson?) 



Off entrance to Port Philip, Australia. 33 fms. sand. 



Trochus (^Solariella) philippensis^V ATSON, Journ. Linn. Soc. Lond. 

 XV, p. 92 ; Challenger Gasteropoda, p. 73, t. 6, f. 10. 



M. LAMPRA Watson. PI. 36, figs. 17, 18. 



Shell depressedly conoidal, angulated at the periphery, rounded 

 on the base, umbilicated, polished, finely sculptured, solid. Sculpt- 

 ure: the glossy surface is closely fretted with fine, curved, oblique, 

 longitudinal scratches, crossed by very similar but slightly stronger 

 and more equal spirals ; these both are stronger near the suture and 

 feebler on the base, when indeed, the spirals almost disappear. 

 Color pellucid pale yellowish-white, with many narrow, opaque, 

 pure white sjiirals, which are flecked with fine zigzag brown longi- 

 tudinal lines, aggregated in spots, and most abundant near the 

 suture. The strongest opaque spiral is at the periphery, and on it 

 are minute linear interruptions of the fundamental color and very 

 regularly recurring little brown spots, which are about half the 

 width of their interspaces. On the base the brown spots are very 

 few and minute. There is very little iridescence anywhere. Spire 

 low. Apex minute and projecting. Whorls 6, depressed, equally 

 curved, slightly angulated at the peripherj^, more flattened on the 

 base than above, of regular, but rather rapid increase. Suture slightly 

 impressed. Mouth small, rounded. Outer lip thin and perfectly 

 simple. Inner lip porcelanous, thick and flat, projecting in a 



