394 
Dr. O. Burger on the 
This is a rather slender species, in general proportions some- 
what resembling Beeve’s representation of Bulimus Thomp - 
soni (Conch. Icon. pi. xxiv. fig. 158). It is moderately thin 
and clothed with a yellowish-olive glossy epidermis, exhibiting 
at short intervals oblique streaks of a darker tint and close to 
the suture becoming decidedly yellow, so that the upper edge 
of the last whorl appears to be bordered with that colour. 
The three uppermost volutions, which have lost the epi- 
dermis, are pale brown. All the whorls excepting the last 
are sculptured with spiral and oblique stride, forming a rather 
fine granulation. The body- whorl is rather long and orna- 
mented only with lines of growth which are well marked and 
slightly puckered at the suture. A faint band is noticeable 
just above the middle, and several other transverse lines 
parallel with it are also observable on close inspection. 
This species resembles A. simplex , Smith, in the absence 
of colour-markings and in the size of the apical whorls, but 
differs entirely in its more elongate form. This is particu- 
larly apparent in the body-whorl and aperture. 
The above description is based on a single specimen recently 
presented to the British Museum by Colonel J. H. Bowker. It 
was collected on the Drakensberg, north of Natal, at an eleva- 
tion of 5000 to 6000 feet, by Mr. Henry E. Burnup, after 
whom I have named the species. 
XLVII . — Summary of Researches into the Anatomy and His- 
tology of Nemer tines , with Contributions to their Classifi- 
cation. By Dr. Otto Burger *. 
Nemertines used to be commonly classed with the Platy- 
helminthes, and thus brought into the closest relationship 
with the Turbellaria ; only a small number of authors, among 
whom von Sieboldf must be mentioned, placed them at an 
early period among the Annelids. MHntosh, however, was 
one of those who held this view, to which he gives expression 
in prefixing to the whole of his monograph the title c The 
British Annelids. — Part I. Nemerteans.’ Yet it is only 
within the last ten years that the views with regard to the 
proper position of the group have undergone a more extensive 
* Translated from the ‘Zeitschrift fiir wissenschaftliche Zoologie, 
Bd. L. Hefte 1 and 2, June 1890, pp. 248-260 ; whole paper, ibid. pp. 1- 
277, with ten plates and twelve woodcuts in the text, 
t V. Siebold , 1 Lehrbuch der vergleichenden Anatomie,’ 1848. 
