22 



DR. HJALMAR BROCH 



"1918 



Anelasma this must be said to be a very small amount, as in the 

 latter species at least about two thousand eggs, large and richly 

 furnished with yolk, are developed at a time in the mantle cavity. 

 There must thus be more me ed for food in Anelasma than in 

 Scalpellum. This need must be supplied by other organs than the 

 aliimentary canal, and we have here indirect evidence that Ane- 

 lasma absorbs at all events the main supply of its nutriment from 

 its host through the filamentary offshoots which are immersed in 

 the body of the shark. This has already been supposed by Koss- 

 mann (1874) and Geoffroy Smith (1906). 



—A 



Textfl<f. V. Degenerating tissue of Elmopterus spinax at the fllament 

 of Anelasma (A), e. = degenerating erythrocyte; 1. = degenerating leuco- 

 cyte. [X 460] Rabl. Weigerts haematoxyline— iron ammonium sulfate, 



VAN GlESSON. 



The filaments are, as previously mentioned, in their proximal 

 parts covered by a rather thick cuticle forming thie direct continua- 

 tion of the cuticle of the peiduncle. The cuticle is rather thick 

 nearer the offspring of the filament, but becoimes thinner the more 

 we approach the distal part of the filament, and at last fades 

 away entirely. The absorbtion of nutrimient must accordingly take 

 place at the tips of the filaments. A study of the shark confirms 

 that the filamental end parts of Anelasma strongly influence the 

 tissue s of the host. Where the filaments of Anelasma push on 

 through the musoles of Etmopterus, a pronounced degeneraition of 



