ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 181 



Besides the anti-ambulacral nerve ring in the radialia, he found 

 connectives in the basalia which united in pairs the strands extending 

 from the central organ. The pairs run a separate parallel course to the 

 ring in the radialia and there unite. The chiasma is simpler than in 

 Antedoa. There is a chiasma in each axillary joint. 



The chambered organ has no continuations upwards ; its five 

 chambers end blindly. Inferiorly it sends processes into the stalk, and 

 from these in the nodes the vessels of the cirri arise. The organ is 

 lined by a thin connective tissue, with a distinct endothelium. All its 

 parts contain dark granules of unknown nature. In the upper portion of 

 the organ delicate strands of connective tissue without lime run from 

 wall to wall internally. 



From the glandular organ an axial strand passes into the stalk ; it 

 •consists of a simple tube with a narrow lumen. In the calyx the organ 

 •consists of a large number of vesicles, in the midst of which there is a 

 small lumen separated off by ccelomic epithelium, and crossed in its 

 lower part by some strands of connective tissue. On the upper part of 

 the gladular organ there is a large cushion of cells with which vessels 

 from the labial plexus are connected. No direct connection between 

 blood-vessels and the glandular vesicles was seen, but blood-vessels pass 

 under the epithelium enveloping the glandular organs. 



The germ-cells arise in the complex apposed to the glandular organ . 

 From this a strand passes close to the gullet to the labial vascular 

 plexus. By branching an abundant network of genital strands is formed 

 beneath the integument of the calyx-operculum. From the network 

 outgrowths pass up the arms to the pinnules. The strands and their 

 outgrowths are double tubes, a blood-vessel round a genital tube. It is 

 hardly possible to distinguish between blood-vascular system and repro- 

 ductive organs ; they are most intimately bound up together. 



Limnocodium in Munich Botanic Gardens.* — E.Boecker detected 

 this fresh-water medusoid in the Victoria Regia tanks in the Botanic 

 Gardens at Munich. The specimens seemed to be exclusively males. 

 It is noted that they congregated most abundantly in the tank at the 

 place which was most in the sunshine, but that was also nearest the 

 heating arrangement. They flourished quite well in a glass vessel in a 



•cool room. 



Coelentera. 



Stylasterina of Siboga Expedition.! — S. J. Hickson and Helen M. 

 England describe 2o species of Stylasterina, of which 11 are new. The 

 new genus Steganospora is established for a form in which the gastro- 

 zooids, and also the dactylozooids, are intimately connected by short 

 broad canals. 



Ceylonese Alcyoniidse.J— Edith M. Pratt reports on a collection 

 made by Professor W. A. Herdman off Ceylon. There are 5 species of 

 Sarcopkytum (3 new), 2 of Lobophytum, 8 of Sclerophytum (1 new), and 



* Biol. Centralbl., xxv. (1905) pp. 605-6. 



t Siboga Exped., viii. (1905) 26 pp. (3 pis.). See also Zool. Zentralbl., xii. (1905) 

 pp. 560-1. 



X Ceylon Pearl Oyster Fisheries, 1905, Part iii., Supp. Rep. xix. pp. 247-68 

 <3 pis.). 



