394 Dr. O. Burger on the 



This is a rather slender species, in general proportions some- 

 what resembling Reeve's representation of Bulimus Thomp- 

 soni (Conch. Icon. pi. xxiv. fig. 158). It is moderately thin 

 and clotlied 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 striai, 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. 



XL VII. — Summary of Besearches into the Anatomy and His- 

 tology of Nemertines, with Contributions to their Classifi- 

 cation. By Dr. Otto Buegeii *. 



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 Siebold f must be mentioned, placed them at an 

 early period among the Annelids. M'Intosh, however, was 

 one of those who held this view, to which he gives expression 

 in prefixing to the whole of his monograph the title ' 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 'Zeitschriffc fiir wissenschaftliche Zoologie, 

 Bd. L. Ilefte 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, ' Lehrbueh der vergleichenden Anatomie,' 1848. 



