MOLLTTSCA OF THE ' CHAI/LElfGEB ' BXPEDITION. 381 



10. rusTJS (Neptunea) ruTiLE, n. sp. 



St. 150. Peb. 2, 1874. Lat. 52°4' S., long. 71^22' E. Between 

 Kerguelen aud Heard Islands. 150 fms. Eock. Bottom, tem- 

 perature 35°-2. 



Shell. — Thin, pale, fusiform, long, very bluntly ribbed and with 

 equal spiral threads ; the whorls are rounded, the suture rather 

 deep and oblique, the mouth club-shaped, the pillar small and 

 somewhat twisted. Sculpture. In the middle of the whorls are 

 low rounded riblets, which extend to neither suture ; they are 

 parted by shallow rounded furrows broader than the ribs ; the 

 surface is scored with strongish hair-like lines of growth. Spirals 

 — there are clear well-rounded threads, about 9 on the penulti- 

 mate, and fewer on each preceding whorl ; on the last whorl they 

 are not so equal as on the others, being somewhat stronger in the 

 middle of the whorl ; they are parted by squarish shallow furrows. 

 Colour pale greyish white ; but the specimen is bleached. Spire 

 high and conical. Apex small, smooth, rounded and slightly de- 

 pressed. WJiorls 7, of slow increase, rounded, contracted above, 

 slightly so below ; the last is small, I'ounded on the base, and pro- 

 longed into a small and somewhat twisted snout. Suture oblique, 

 impressed, minutely channelled. Mouth club-shaped, being oval 

 above, and produced into a longish canal below. Outer lip much 

 broken. Inner lip : there is a very narrow thin glaze on the body 

 and pillar, of which the point is bent upwards and twisted. H. 

 0-74. B. 0-3. Penultimate whorl, height 0-15. Mouth, height 

 0-36, breadth 0-17. 



This species has some resemblance to the young of F. (If.) 

 lachesis, Morch, but has the apex much smaller, is in form more 

 conical, has the suture more oblique, possesses longitudiual ribs, 

 and has the spirals stronger. Compared with F. (iV.) latericeus, 

 Moll., the apex is much smaller, the whorls are of much slower 

 increase, are more rounded, and are more contracted above, tlie 

 suture is deeper and more oblique, the ribs are weaker, the spirals 

 are stronger, and the snout is longer and more twisted than in 

 that species. Compared with F. (JV.) undulata, Friele (which I 

 only know by the admirable plate, kindly sent me by the author), 

 this -F./wffZe is smaller in the apex, less cylindrical aud more 

 conical, the whorls are less rounded, and difference in breadth 

 below and above is much greater ; the suture, too, is much less 

 impressed and more oblique. 



