On a Hermaphrodite Examjyle of the Ihrr'uKj. \ 95 



Fly. 14. Ditto. Girdle-face of the same individual : not very typical, 

 ll'OO '^ 



1 ■ 

 Fiij. lo. Ditto. Valve with unusually elongated lateral prolongations of 



the chromatt)phore-plate. - '''^. 

 Fi(]. 16. Ditto. A typical f,'irdle-fftce. 

 Fuj. 17. Si'llaphura {?) bacillifonnis (Gruu.), Mer. Valve, after Gruuow 



(Arct. Diat. pi. ii. tig. 51). 



XXXr. — Oil a Ilennaphrodit'i Example, of the Herring 

 (Clupea harengus). By TllOM.VS SOUTIIWELL. 



Dr. Gunther remarks (' Stuily of Fis!ies ') that instances of 

 so-called liennaphroJitisin have been observed in t!ie codfish, 

 some Pleuvonectid;e, and in the herring; but I bslieve that 

 in the latter species such instances are very rare. It may 

 therefore be worth recording an example recently sent me by 

 Mr. Patterson, of Yarmouth, for examination. 



Mr. Yarrell exhibited the bi-sexual organ of a herring at a 

 meeting of the Zoological Society on the 23rd September, 

 18-45 (P. Z. S. 1845, p. 91) ; there is also a description of a 

 similar compound sexual organ in this fish by Dr. A. J. Smith 

 in the 'Journal of Anatomy and Physiology,' 1870, vol. iv. 

 p. 258; in addition to these, Dr. Day (Brit. Fishes, ii. p. 219) 

 refers to a third example of the same kind recorded by Malm 

 (OElV. Ak. Forh. 1876, pi. v.) ; this latter description 1 have 

 not seen. 



The example sent me, which had been removed from the 

 fish, was of the usual form of the comj)lete roe; it was 

 130 millim. long ; the anterior portion, consisting of tiie 

 female organ, was 95 millim. in length and 30 millim. at its 

 greatest deptli. The male organ, or milt, occupied the poste- 

 rior portion of the abdominal cavity and was 35 millim. in 

 length, ta[)ering off sharply towards its termination. Tiie 

 female roe was divided transversely into two distinct lobes, each 

 contained in the usual investing membrane, but the male 

 portion (milt) was in a single mass, the division between the 

 two organs being more or less vertical, but the former ex- 

 tending furthest to the rear along the dorsal portion. The 

 lobes of the female organ thinned out towards their posterior 

 outer margins and a portion of the milt obtruded between them 

 in the form of a wetlge. Both bodies were fully matured and 

 had a healthy appearance, but owing to their having been 

 removed from the tish, which had previously been smoke- 

 dried, a more minute examination was impossible. 



