45 



on the second post-nuclear whorl, a third spiral appears near the suture, on the penultimate 

 whorl the number of lirae is four, of which 2 strong ones on the basal, 2 smaller ones on 

 the upper half; last whorl with 9 lirae on the upper surface and about 10 on the base, often 

 but not regularly, they are alternately stronger and weaker. The whole shell is crossed by 

 conspicuous growth-lines, rendering the lirae more or less beaded. The colour is yellowish-white, 

 with interrupted, blackish-brown flammules and a lighter zone above the periphery; the base is 

 nearly covered by the darker colour. Umbilicus moderately wide, radiately striated interiorly, 

 with a conspicuous funicle and a very slight second one near the margin, which is bordered by 

 the last of the lirae, which is strong and conspicuously beaded. Aperture almost rhombic, outer 

 and basal margin thin, thickened in the interior, the outer one internally with 5 strong lirae, 

 the basal with 4 slightly elongated teeth, columellar margin excavated, upper end appressed to 

 the body-whorl, its margin slightly reflected, its basal end with two small denticles, corresponding 

 to the grooves under the umbilical funicles. 



Diam. maj. 5^,4, alt. 4^3 ; apert. alt. 2, lat. 2Y3, diam. of umbilicus iYj, Mill. 



I should have hesitated to describe this species as new, were it not that Mr. E. A. Smith 

 has compared it with the collection of the British Museum, where many of the types of the 

 numerous unfigured species of Adams and Gould are preserved. It is remarkable by its angular 

 whorls; it calls in mind many species of the genus Minolta^ but the conspicuous funicle has 

 induced me to describe it as a Monilea. 



3. Monilea (Rossiteria) nuclea Philippi. 



Philippi. Zeitschr. f. Malak. 1S49, p. 171 [Trochus). 



Mart.-Chemn. Conch. Cab. Ed. II, Trochus, p. 306, PI. 44, fig. 9. 



KlENER. Coq. Viv. Vol. X, Trochus, p. 256, PI. 86, fig. 2. 

 PiLSBRY. Man. of Conch. Vol. XI, p. 257, PL 61, fig. 31, 32. 



Stat. 240. Banda. 9 — 36 M. Lithothamnion-bottom. 6 Spec. 

 Stat. 248. Ruma Lusi, North point of Tiur-island. 36 M. i Spec. 



As stated in the descriptions, this species is very variable in colour, and in the Siboga 

 specimens also in coarseness of sculpture. A peculiarity not mentioned in the descriptions at 

 my disposal, is that the outer margin of the shell has a conspicuous sinus below the periphery ; 

 as however the margin is often broken, this may account for the fact, that most observers have 

 overlooked this peculiarity, which is often more clearly seen in former striae of growth. 



Priotrochus Fischer. 



I. Priotrochus i^) incertus n. sp. PI. 11, fig. 4. 



Stat. 59. Western entrance, Samau-strait. 390 M. Coarse coralsand. I Spec. 



Shell conical, with convex base, imperforate, yellowish-white. Whorls 6, convex, separated 

 by a deep suture, which is waved by the ends of the ribs. Nucleus smooth, the other whorls 

 with strong ribs, of which there are 12 on the last whorl, they are crossed on the lower whorls 

 by 2 spiral cords, producing tubercles on the ribs, these ribs extend on the base till the first 



45 



