182 



males examined during January were still immature , there being no 

 ripe spermatozoa in the testes or vasa deferentia. A study of this spe- 

 cies in different stages of growth will very probably reveal sexual con- 

 ditions essentially like those which obtain in the free-living forms. 



Without wishing to attack Beard' s general proposition that »her- 

 maphroditism, probably all hermaphroditism had its origin in a uni- 

 sexual condition« — a proposition supported by the weighty authority 

 of Fritz Müller'-' — I must, nevertheless, dissent from the English 

 author's view that the Myzostomes present sexual conditions of the 

 same nature as the Cirripedia. The mutual resemblance extends only 

 to the hermaphroditism which has probably been acquired in both 

 groups in consequence of a sedentary or sluggish life. A much closer 

 resemblance exists between the Myzostomes and the protandric Iso- 

 pods [Anilocra, Nerocila, Cymothoa) described by Bullar*" and Paul 

 May er 11, or between the Myzostomes and Myxine as described by 

 Cunningham'2 and Nansen^^. 



In conclusion I wish to thank Prof. D o h r n for the facilities which 

 I have enjoyed while working at his Zoological Station, and Professors 

 Eisig and Paul Mayer for many a kind suggestion. 

 Stazione Zoologica, Naples, April 1st 1894. 



4. Eine neue Brookesia (Chamaeleontidae) aus Nossìbé. 



Von Prof. Dr. O. Boettger, Frankfurt am Main. 



eingeg. 9. April 1894. 



Brookesia Stumpffi n. sp. 

 = Chamaeleo [Brookesia) superciliaris Boettger, non Ch. superciliaris 

 Kuhl. in: Abhandlg. Senckenbg. Nat. Ges. 11. Bd. 1879, p. 484, Taf.- 

 Fig. 2 und 12. Bd. 1881, p. 481, Taf. 3 Fig. Ila— 5. 



Char. Körper schlank, walzenförmig, von den Seiten wenig zu- 

 sammengedrückt, Rücken flach. Helm hinten stumpfwinklig aus- 

 gerandet, die Orbitalbogen in kurze, nach vorn und oben gerichtete, 



'^ Fritz Müller, Die Zwitterbildung im Thierreiche. Kosmos, 2. Bd. 1885. 



10 J. F. Bullar, The Generative Organs of the parasitic Isopoda. Journ. Anat. 

 and Phys. Vol. XL 1876. p. 118—128. Tab. IV. 



11 Paul Mayer, Carcinologische Mittheilungen. VI. Über den Hermaphrodi- 

 tismus bei einigen Isopoden. Mitth. a. d. Zool. Stat. Neapel, 1. Bd. 2. Heft. p. 165 

 —179. Taf. V. 1879. 



12 J. T.Cunningham, On the Structure and Development of the Keproduc- 

 tive Elements in Myxine glutinosa, L. Quart. Journ. Micr. Sei. Vol. XXVII. n. ser. 

 p. 49—76. Tab. VI and VII. 1887. 



13 J. Nansen, A Protandric Hermaphrodite [Myxine glutinosa, L.) amongst 

 the Vertebrates. Bergens Museums Aarsberetning for 1887. p. 5 — 35. Tab. I and II. 

 1888. 



