420 Miscellaneous. 



the presence of a long spiculum, ou acconut of which he names it 

 Opalina spiculata. 



The body is elongate-ovate, somewhat pointed in front ; its length 

 is 235-240 fx, and its breadth from 37-38 jj. The whole surface 

 is covered with short cilia, which form regular longitudinal series, 

 and are somewhat longer and more numerous at the anterior end. 

 The nucleus is spindle-shaped and occupies the whole length of the 

 body. Instead of the contractile vacuoles there are several pale 

 vesiculiform nuclei. 



The special character of the former consists in a long spiculum, 

 which lies in the interior of the body, and occupies about two thirds 

 of its total length. 



A constriction at the hinder part of the ])ody behind the spiculum 

 indicates a new individual ; but the formation here of a small spiculum 

 always precedes the production of the divisional groove, so that the 

 spiculum of the parent has absolutely no pai t in the production of the 

 young. The length of the new Opalina thus produced is about 57- 

 58 u ; its form is oval, its nucleus does not occupy the whole length of 

 the body, and the spiculum is only about half that length. The newly 

 formed Opalinoi eitlier separate from the parent and swim away, or 

 remain united to it to the number of two, three, or four. By its 

 mode of production the parasite most resembles 0. pr-oJifera, Clap., 

 by the presence of the spiculum 0. uncinata, Clap. — IStilL Acad. 

 Imp. JSci. St. Petersh. tom. xxx. pp. 512-514. 



A new Gazelle from the Somali-land. 

 By M. Franz Kohl. 



The author describes a new species of gazelle, brought by M. J. 

 Meno-es from the Somali-land, and of which the museum at Vienna 

 possesses an adult male example. 



Gazella Pelzelnii, Kohl (sp. n.). 



This new species is most nearly allied to Gazella arahica, Licht- 

 enstein (Hcmpr. & Ehrenb.), as regards both the coloration and the 

 form of the horns. It is somewhat smaller, about the size of a small 

 roe-deer ; its head is smaller than in G. arahica^ and the portion 

 of the skull behind the horns a little longer in proportion. The 

 horns, as in the compared species, are very slender, much longer 

 than the head (27 centim.), but instead of 14-17 have 21 rings, of 

 which, however, the last is very weak and indistinct. In the cur- 

 vature of the horns the two species are alike ; but in G. Pelzelnii 

 they diverge much more, so that the distance between the tips is 

 much greater — in G. arahica 3" 6"'-3" 10'", in G. Pelzelnii 5" 2'" 

 (13*6 centim.). Further differences are shown in the proportions 

 of the skull. 



Statement of the collector : — Pupil elongate,, iris deep dark blue. 

 Collected at Berberah, in the Somali-land, 21st January, 1885. — 

 Verli. zool.-hot. Geselhch. in Wien, Baud xxxvi. 1886, Sitz. p. 4. 



