1907.] MK. H. SCHERREN ON HYBRID BEARS. 431 



Avhich bounds the male pores posteriorly, and is comparable to a 

 rudimentary penis or pair of penes. Of this structure there seem 

 to be the equivalents in a few other species, viz. in E. sylvestris *, 

 E. harnimi t, E. n&mnanni %, E. viridescens, and perhaps 

 E. t07-eutus §. Although the mere thickening which I have 

 figured in E. rmmnzorii is different from the jjrojecting penis of 

 E. viridescens, the immaturity of my specimen might account for 

 the difference very easily. 



But Eminoscolex ruimiizorii is to be distinguished from E. syl- 

 vestris and E. harnimi by the fact that the dorsal settp are further 

 apart than in those species, where the distance a-h is three times 

 the distance c-d. It cannot be confused with E. neumanni by 

 reason of the fact that in the latter species the spermathecal 

 pores are opposite to the lateral setee, whereas in E. ruioen- 

 zorii they are, as in the majority of species, in front of the 

 ventral setse. There remain E. toreutus and E. viridescens. In 

 the latter species ||, however, the spermathecal pores are a segment 

 further back and are placed in a common depression ; in E. toreutus 

 the spermiducal glands appear to have a different form and the 

 spermathecfe are larger. Eminoscolex rtuoenzorii may be thus 

 defined : — 



Eminoscolex ruwenzorii. 



Length 200 7nm. ; breadth 4-5 mm. Ventral setce rather f^trther 

 apart than lateral, the proportions being 6:5. Ventral setcs of nine 

 anterior segments enlarged. Male pores xvii./xviii., loith thickened 

 posterior margins (a penis ?) ; female pores xii.jxiii., in line loith 

 seta b. Copidatory- gland p)ores on xiii./xiv. Proximal ends of 

 four sperm-ducts loidened and tivistedj into a closely adpressed coil. 

 Spermidthcul gland of only moderate length, vnth narroio inuscidar 

 duct. Spermathecoi more or less spherical, not conjoined. 



4. Some I^otes on Hybrid Bears. 

 By Henry Scherren, F.Z.S. 



[Received April 9, 1907.] 



The fact that some months ago the Hon. Walter Rothschild 

 purchased from Stuttgart and deposited in the Society's Gai-dens 

 two hybrid Bears attracted attention to these animals, and 

 induced me to look into the literature on the subject. Bears play 

 a considerable part in folk-lore ; and one might have imagined 

 there would be many references to cases of hybridity, seeing that 

 these animals have been credited with carrying off women. The 

 following story is quoted by Gesner % from Gillius : — • 



" De Philippo Oosseo Constantiensium sacris prsefecto, ingenu- 



* Michaeisen, Zool. Jalirb. (Abth. f. Syst.) xviii. p. 486. 

 f Id. MT. Hamb. wiss. Anst. xvii. J Id. ihid. xiv. 



§ Id. " Regenwiivmev," in Deutsch-Ost-Afrika, p. 9. 



il Michaelsen, Oligoclifeta in ' Das Thierreich,' Lief. 10 (Berlin, 1900), p. 407. 

 ^ ' Historic Aninialium.' lib. i., p. 1068. 



29* 



