BIHANG TILL K, SV. VET.-AKAD. HANDL. BAND 27. AFD. IV. N:0 6. 9" 



its surface small specks or "maculse" of a yellowish brown 

 colour, not seldom accompanied by minnte protuberances 

 and more or less cylindrical processes. A glance at the fig- 

 nres 1 — 5 on pJate I will easily throw light upon tliese 

 matters. 



In order to give an exact idea of the arrangement and 

 variations of these maculse and protuberances, as well as of 

 the bundles of genital tubes in different speciniens, so as to 

 make them comprehensible, it may be convenient to first 

 quote some notes from my diary with reference to fresh ma- 

 terials. 

 Specimen 1. Cauglit July 9, 1900. Length about 170 mm.^ 



a. The posterior portion of the genital basis devoid of 

 tubes has a length of 3 mm. and is provided with 

 several yellowish maculse and a couple of minute pro- 

 tuberances. 



b. The genital basis immediately in front of the former 

 portion carries 12 bundles of male tubes of a light 

 flesh or even whitish colour measuring about 37 mm. 

 in length. 



c. The anterior portion of the genital basis protrudes 

 16 bundles of female tubes, those most posteriorly 

 situated being the largest and having a length of 

 about 15 mm. They are blood- or brick-coloured and 

 are filled with larger and smaller eggs, with the ex- 

 ception of the six posterior bundles' which are empty 

 and irregularly swollen. 



d. The foremost part, where the efferent duct issues,. 

 is provided with a series of very minute, scarcely 1 

 mm. long, cluster-like or unbranched globular tubes. 



Specimen 2. Caught July 9, 1900. Length about 200 mm. 



a. The posterior naked spiral portion of the genital 

 basis measures 3,5 mm. in length, and is marked with 

 tw^enty light brown maculse and, anteriorly to these, 

 an equal number of small obtuse prominences. 



b. The portion immediately in front of the former, car- 

 ries 22 bundles of large, 50 mm. long, light flesh- 

 coloured male tubes filled with mobile spermatozoa. 



c. Anteriorly to the former, the genital basis supports 



' In consequence of the power possessed by the animal of contracting 

 its body, the measurements cannot be exactly given. 



