XOTES AND EXHIBITS. 649 



"Sowerby's specimen, l)ut each of the bent angulated longitudinal 

 markings is more blue-flamed on the concave upper surface than 

 is represented in his figure. There is a point about this species 

 which is worthy of note: the apex, as is pointed out by Brazier 

 and Sowerby, is obtuse, but its summit consists of a fine ver}^ dark 

 spine; it commences the apical whorl which is smooth, and shows 

 a distinct line of separation from the next apical whorl ; com- 

 mencing from this line of union the second whorl is still quite 

 dark red-brown for a very short space, and then divides into a 

 light yellow-cream, brighter than the body whorls, on the upper 

 half following the suture of the apical whorl and continuing dark 

 below for about half the distance, ending in the third whorl, when 

 the dark colour disappears and is uniformly of a waxy yellow as it 

 terminates: for the next whorl faint brown transverse markings 

 commence which gradually blend at their upper ends and terminate 

 in the dark almost continuously interrupted marginal zone now 

 at the apical margin of the whorls from which the longitudina 

 arched markings are given off to the termination of the lip on the 

 body whorl. The upper transverse narrow band of the body whorl 

 passes just above the insertion of the lip on to the whorl above it 

 as is well shown in Sowerby's figure, continuing round on to the 

 next whorl just above the suture and becoming lost opposite the 

 labial insertion. The first apical whorl I pointed out is quite 

 smooth; the next is also smooth for a short distance from the 

 apical union, then transverse, prominent, slightly tuberculose 

 ribs commence till about the termination of the third whorl when 

 they lose their j^rominence and tubercular form and ultimateh-- 

 blend into the longitudinal strise which, as Sowerby points out, 

 are very clear, or as Brazier expresses it " distinctly striated." 

 The whorls are rather flattened from below the middle as the}'' 

 proceed upwards to the suture, giving a slight shouldered elevation 

 on the whorls. Unfortunately a small portion of the lip of my 

 specimen is broken towards the upper part, but Avhat remains of 

 it quite corroborates what Sowerby says of his specimen. My 

 specimen comes also from Port Darwin, the Northern Territory 

 of S. Australia. 

 43 



