26 DR. HJALMAR BROCH [1918 



Raab, F., (1914), Beitrag zur Anatomie und Histoloi>ie der 



Euphausiiden. (Arbeiten der Zoolog. Insti- 

 tute, Tom XX). Wien. 



Smith, Geoffroy (1906), Rhizocephala. (Fauna und Flora des 



Golfes von Neapel, 29. Monogr.). Berlin. 



Explanation of the plates. 



Plate I. 

 Anelasma squalicola. 



Fig. 1. Two specimens in situ at the dorsal fin of an Etmopterus, 



Nat. siz«. 

 » 2. Sagittal section of the thorax [X 5]. S = stalk; I to VI 



the six left cirri; P = penis; m = moulh opening; oe = 



oesophagus; s = stomach; i == digestive intestine; p = 



proctodæum; a = anus. 

 » 3. Part of a transverse section of the oesophagus [X 320]. 



c = cuticle; r = ring muscle. Bouin. Boraxcarmine, 



bleu de Lyon. 

 » 4. Part of a transverse section of the oesophagus, showing 



the connection of the dilatatory muscles with the cuticle 



[X 320]. Bouin. Boraxcarmine, bleu de Lyon. 

 » 5. Longitudinal section of the alimentary canal at the trans- 



ition from the stomach (s) to the digestive intestine (i). 



[X 320]. Rabl. Weigerts haematoxyline — iron ammo- 

 nium sulphate, van Giesson. 

 » 6. Epithelium from the digestive intestine [X 460]. Rabl. 



Weigerts haematoxyline — iron ammonium sulphate, 



eosine. 



Plate II. 



Anelasma squalicola. 



Fig. 7. Epithelium from the proctodæum [X 460]. Bouin. Borax- 

 carmine, bleu de Lyon. 

 » S. Entrance of the duct from the digestive gland into the 

 digestive intestine in a quite young specimen. At X, the 

 transition from glandular into intestinal epithelium. 

 [X 320]. Rabl. Weigebt's haematoxyline-iron ammonium 

 sulphate, van Giesson. 

 » 9. Section of the digestive gland in the same specimen. 

 [X 460]. Rabl. Weigerts haematoxyline-iron ammonium 

 sulphate, van Giesson. 



