6 DR. HJALMAR BROCH [1918 



The large peduncle of Anelasma con ta ins the enormous ovaries 

 whioh occupy most of its interior. At the upper side of the ovaries, 

 and in the basal parts of the mantle, Geoffroy Smith believes to 

 have observed degenerating ova in large numhers; as I have 

 demonstrated in a preliminary report (1918), these «degenerating 

 ova» are in fact the eenientary glands of Anelasma which have 

 escaped the attent ion of previous investigators, partly owing to the 

 bad state of preservation in the animals investigated. — From the 

 ovaries the paired oviducts pass through the basal part of the 

 thorax, and end into the paired atrium which opens at the base of 

 the first pair of cirri. 



The mantle of Anelasma (pl. I, fig. 1) is comparatively large, and 

 distinguished by the complete lack of calcareous formations. 

 Certainly, Loven states that he has observed minute dendritic 

 calcareous particles in the mantle, and even gives a figure of them; 

 Darwin however, could not confirm Lovens observations, and 

 neither Kossmann nor Geoffroy Smith make any allusions 

 to these formations; I have in vain sought for such calcareous 

 formations even in fresh material. - - Darwin assumes that the 

 proboscis of the animal cannot be covered by the mantle; this 

 supposition does not hold good, many of the specimens investigated 

 in a living state being wholly wrapped up in their mantles. 



The thorax of Anelasma (pl. I, fig. 2) is characterised by its 

 reduoed cirri and its rather short and stout penis. The oral part 

 of the thorax is tranisformed into a prominent proboscis furnished 

 with remarkably reduced mouth feet. 



The internal anatomy has hitherto only been Little studied. In 

 the alimentary canal we may distinguish four regions, viz. the 

 oesophagus, the stomach, the digestive intestine, and the procto- 

 dæum. From the mouth opening (pl. I, fig. 2) a rather short 

 oesophagus leads in dorsal direction to the stomach; it is endowed 

 with a well developed musculature. The small, but richly folded 

 stomachal part, which is alinost destitute of musculature, opens into 

 the digestive intestine, which is very voluminous, and furnished with 

 a great lumen; the digestive intestine occupies almost the dorsal 

 half of the thorax, and runs parallel with the dorsal side of the 

 animal, making a rounded bend in its foremost part. Through a 

 sharp restriction it is distinguished from the proctodæum, which is 

 rather narrow, and terminates in the anus situated at the dorsal 

 and basal side of the penis; there is a short furrow at the dorsal 

 side of the penis behind the anus proper. On each side of the 

 digestive intestine, and in the basal part of the thorax (the «stalk») 

 a large, branched digestive gland is situated; it opens through a 

 short duct into the digestive intestine shortly behind the stomach, 

 one duct on either side of the intestine. — The ventral part of the 



