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varying from 13 to 56 m. The specimens, even those from the same station, often show 

 considerable differences in colour ; most of the specimens are small, and some of them at 

 least may not be full-grown. I think it wil! be best to give short descriptions of the 

 di Herent sets. 



I. Stat. 2. March 8, 1899. Lat. 7° 25' S., Long. ii3°i6'E. Depth 56 m. Bottom: grey mud 



with some Radiolaria. Madura-strait. Half a dozen specimens attached to the 

 shell of a Gastropodous mollusc. 



Small specimens : greatest diameter of the basis of the largest specimen 5 mm., shell 

 conical, greatest diameter of orifice 2.5 mm. Radii not very broad, with the summits very 

 oblique. Colour dirty white, with reddish tinted longitudinal bands crossed by greyish horizontal 

 stripes. Radii with distinctly reddish horizontal stripes on a lighter underground. 



The se u turn has prominent growth-riclges, finely and not very distinctly beaded. The 

 adductor ridge is not very strongly developed. 



The ter gum has a moderately broad spur with a longitudinal depression, not a deep 

 furrow. The two portions of the basal margin, on the opposite sides of the spur, lie in a 

 nearly straight line. Basi-scutal angle sharp, spur scarcely extending beyond the basal margin, 

 and the extremity not sharply pointed. Internally the articular ridge is prominent; the crests 

 for the depressor muscles only feebly developed. 



This set corresponds in several characters to Darwin's var. (1) communis. 



II. Stat. 50. April 16/18, 1899. Bay of Badjo, West coast of Flores. Depth up to 40 m. 



Bottom : mud, sand and shells, according to locality. Numerous (about 25) specimens. 



Middle-sized specimens : attached to small sticks or sterns, and therefore laterally flattened 

 with the basis elongated, narrow, and excavated. Longest diameter of one of the larger spe- 

 cimens near the basis, S mm. Colour from nearly white to dark purple, the colour being 

 mostly in longitudinal stripes and in dark patches, arranged in horizontal lines crossing the 

 longitudinal ones. Orifice large, rhombiform, toothed. Radii with the summits never quite 

 parallel to the basis, but slightly or strongly oblique, often somewhat excavated. The colour 

 of the radii is often darker than that of the compartments, and in several specimens even dark 

 purplish ; always distinctly horizontally striped. 



The scutum with the lines of growth developed into distinct ridges, showing, though 

 not very distinctly, microscopical beads at the surface. Adductor ridge long, but not very prominent. 



The terg urn has the spur broad and the longitudinal furrow indicated by a very 

 shallow depression only ; extremity of the spur rounded ; crests for the depressor muscles very 

 distinct. Growth-ridges well-developed and beaded like those of the scutum. 



This set shows some resemblance to Darwin's var. (9) cirratus, but I think it best 

 not to identify it with the same. 



Illtf. Stat. 71. Makassar and surroundings. May 10 — June 7, 1899. Depth 27 — 32 m. 



Three specimens of very characteristic shape, only one of which, however, is complete : 

 the second is an empty shell without the opercular valves, and the third is represented by a 



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