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



Family HETEROPHROSYNiDiE, Clark, 1855. 

 Genera. 1. Jeffreysia, Alder. 2. Barleeia, Clark. 



1. Jeffreysia, Alder, 1850. 



Jeffreysia edwardiensis, Watson (PI. XLIII. fig. 5). 



Jeffreysia edwardiensis, Watson, Prelim. Eeport, pt. 5, Journ. Linn. Soc. Lond., vol. xv. p. 99. 



Station 145a. December 27, 1873. Lat. 46° 41' S., long. 38° 10' E. Prince Edward 

 Island, between Cape of Good Hope and Kerguelen. 310 fathoms. Volcanic sand. 



Shell. — Tumidly conical, fiattish on the base, thin, glossy. Sculpture : the whole 

 glossy surface is covered with extremely fine lines of growth, and with still fainter and 

 more minute spirals, which are only vaguely discernible under the microscope and in very 

 favourable light. Colour whitish, hyaline. Spire conical. Apex bluntish, and a little 

 obliquely rounded. Whorls 4^, tumidly convex or rounded, of regular increase until the 

 last, which is somewhat disproportionately swollen. Suture rather shallow and open. 

 Mouth perpendicular, oval, rather large. Outer lip sharp and thin, with a slight sinus at 

 its junction with the body ; incurved above, slightly flattened in the middle, advancing 

 below, patulous and prominent on the base, but slightly sinuated towards the point of 

 the pillar. Inner lip just connected with the outer by a film across the body, closely and 

 shortly bent back on the umbilicus, and sharp on the edge of the pillar. Pillar straight, 

 angulately springing from the body-whorl, bending a little to the left. Umbilicus a 

 minute chink, almost covered by the inner lip. H. 0'075 in. B. - 048, least - 04. Pen- 

 ultimate whorl, height 0"017. Mouth, height 0*037, breadth 0"028. 



The general aspect of this shell resembles that of Jeffreysia, but the inner lip by no means pre- 

 sents so continuous a peristome as any of our British species of the genus, and the junction of the 

 pillar to the body is quite distinctly angulated, which is not the case in any Jeffreysia known to me. 

 If assigned to this genus, therefore, it is rather because none else lies nearer, and in the absence of 

 the animal and of the operculum, a new genus would be absurd here. 



2. Barleeia, Clark, 1853. 

 Barleeia imbricata, n. sp. (PI. XLIII. fig. 2). 

 July 29, 1874. Levuka, Fiji. 12 fathoms. 



September 7, 1874. Torres Strait, North-east Australia. 3 to 11 fathoms. 

 September 8, 1874. Flinders Passage, Torres Strait. 7 fathoms. 

 Station 186. September 8, 1874. Lat. 10° 30' S., long. 142° 18' E. Wednesday 

 Island, Cape York, North-east Australia. 8 fathoms. Coral mud. 

 July 1875. Honolulu. 40 fathoms. 



