MOLLUSCA OP THE ' CHALLENaER ' EXPEDITTOlSr. 601 



3. Mttbex (Pteeonotus) Cordismei, n. sp. 

 St. 162. April 2, 1874. Lat. 39° 10' 30" S., long. 146° 37' E. 

 Off East Moncoeur Island. Bass's Straits. 38-40 fms. Sand. 



Shell. — Thinnish, pale, fusiform, biconical, scalar, with three 

 foliated and spinous varices, an elongated spire, a papillary tip, 

 tubercled rounded whorls, an elongated scarcely constricted base, 

 and a large flat snout. Sculpture. Longitudinals — there are on 

 each whorl 3 foliated varices, which at the corner of the shoulder 

 rise into a semitubular upturned and slightly reverted spine ; 

 they run out on the snout : between each two varices and nearly 

 on a level with the spines are 3 large prominent rounded 

 tubercles, which are somewhat produced longitudinally ; the 

 lines of growth are very slight. Spirals — besides the carination 

 caused by the line of tubercles and spines, there is on the base 

 a slight angulation. Colour pale. S'pire rather high, conical, 

 scalar. Ajpex consists of two largish cylindrical whorls, of which 

 the top is angulated and obliquely truncated, and the extreme 

 tip inserted. Whorls 6, of slow increase, feebly angulated, with 

 a sloping shoulder ; the last is slightly tumid and elongated, 

 with a slightly constricted base produced into a rather large 

 flattened snout. Suture linear, a little impressed. Mouth 

 oblong, not patulous, rounded above, where to the right a canal 

 runs out into the labral spine ; it is pointed below, where it is 

 prolonged into the longish canal. Outer lijp well arched, pro- 

 minent, thin. Inner lip — above it is continuous with the outer 

 lip ; its course is semicircular ; on the body it expands with a 

 thin edge, which in front, near the opening of the canal, rises in 

 a thin lamina, and is then bent over to the right to cover the 

 canal ; behind it to the left the pillar is scored with the pro- 

 jecting laminae of the old canal-ends, which connect themselves 

 with the longitudinal varices. H. 0"42. B. 0"2. Penultimate 

 whorl, height 0-06. Mouth, height 0-25 (without the canal Oil), 

 breadth 0-07. 



This little shell is very like a Typhis ; but its spines are not 

 pervious. 



4. MuREX (Pteeonotus), sp.(-3/". dentifer, n. sp. ?). 



St. 194. Sept. 29, 1874. Lat. 4° 34' to 4° 31' S., long. 129° 

 57' E. 200-360 fms. Volcanic detritus. 



This is a massive full-grown (?) shell, which in my list I have 

 called M. dentifer, as a new species, but which is in too bad 

 condition for detailed description. It certainly is not in the 



