242 THE VOYAGE OF H.M.S. CHALLENGER. 



Fasciolaria trapezium, Kobelt, Conch. Cab. (ed. Kiister), p. 131, pi. x. figs. 1, 2, pi. xii. figs. 1, 2. 

 „ „ Sowerby, Thes. Conch., pt. 37, p. 11, pi. ccccxxvi. (iii. Gen.), figs. 21-23. 



,, „ v. Martens, Moll. Mauritius, &c, p. 245. 



Tryon, Manual, vol. iii. p. 77, pi. lxi. figs. 24-26, pi. lxii. 27, 28. 



Station 208. January 17, 1875. Lat. 11° 37' N., long. 123° 31' E. Philippines. 

 18 fathoms. Blue mud. 



Habitat. — Red Sea (Issel), East Coast of Africa, Indian Ocean, Ceylon, Nicobars, 

 Malay Archipelago (v. Martens). 



3. Fasciolaria rutila, Watson (PI. XIII. fig. 6). 



Fasciolaria rutila, Watson, Prelim. Report, pt. 12, Journ. Linn. Soc. Lond., vol. xvi. p. 335. 



Station 142. December 18, 1873. Lat, 35° 4' S., long. 18° 37' E. Off the Cape of 

 Good Hope. 150 fathoms. Green sand. Bottom temperature 47° F. 



Shell. — Long, narrow, fusiform, not ribbed, finely spiralled, with a high narrow spire 

 of rounded whorls, a blunt mamillary apex, a contracted rounded base, prolonged into a 

 long, lop-sided, slightly reversed snout. Sculpture : Longitudinals — there are none but 

 small, rude lines of growth. Spirals — there are very many small, rounded, pretty equal 

 threads parted by shallow rounded furrows of about their own breadth ; on the snout these 

 threads are feebler, sharper, and more remote. Colour white under a thin, brown, 

 smooth, persistent epidermis ; the inside of the mouth is tinged with buff, which is 

 deeper on the inner lip than elsewhere. Spire very high, narrow, conical, but a little 

 bent. Apex consists of 1 to 2 large, mamillary, but cylindrical whorls. Whorls 8 in all, 

 high, narrow, of rapid increase, convex, rounded, contracted below as well as above, where 

 they sbghtly lap up on the preceding whorl ; the last whorl is larger than all the rest, is 

 slightly tumid, rounded on the base, which is contracted, especially on the left, and is 

 produced into a very long, narrow, lop-sided, bent, and slightly reversed snout. Suture 

 deep, but very open. Mouth oval, direct, pointed above, prolonged into a long, oblique, 

 narrow, open, twisted canal, which is a good deal reverted in front. Outer lip narrow, 

 blunt, very finely crenulated on the edge; it is very regularly arched, and not at all 

 patulous till it approaches the canal, where it is increasingly patulous to the point ; in 

 this part of its course its curve is concave. Inner lip — there is a diffuse white callus 

 above ; its whole curve is concave to the edge of the canal, where it is obliquely truncate, 

 sharp, and twisted ; its edge in front is extremely narrow and sharp ; there are two slight, 

 oblique, white teeth close to the pillar-edge. Operculum oval, with a pointed, almost 

 claw-like apex ; it is thinnish, horny, sharp-edged, strongly marked with lines of growth 

 on its outer face, and having on its inner face a broad, flat, glossy swelling alono- its 

 outer margin. H. 4 in. B. 1*44. Penultimate whorl, height 07. Mouth, height 2 "2, 

 breadth 078. 



