428 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



Ritter von Stein, regards this as probably the most inter- 

 esting and important section of his great work. Siebold 

 and Kulliker's Zeitschrift also contains the fifth paper on 

 the Anatomy and Development of Sponges, by Professor 

 F. E. Schnlze, the present essay describing and figuring the 

 metamorphosis of Sycandra raphanus. 



A very interesting memoir on the Structure of the Milli- 

 pora has been received from Mr. Moseley, of the Challenger 

 expedition. The MiUip&ra has always been considered a 

 coral, until, in 1860, Professor Agassiz discovered that it was 

 really the secretion from the bodies of minute hydroid pol- 

 yps, in some respects like the common Ilydractinia of our 

 coast. This view was generally accepted in America and 

 Germany, but not in England. Now, however, Mr. Moseley 

 claims, and with a strong array of facts, that Agassiz's posi' 

 tion was the correct one. He lias also published an elabo- 

 rate essay on the Stylasteridce, a group of hydroid-like cor- 

 als, which he proves to be allied to the Millipora. 



Echinoderms. 



Additional essays, by H. Ludwig, on the finer anatomy 

 of the sand-stars and Brisinga a deep-sea, many-armed star- 

 fish, found in deep water off the coast of Norway and in the 

 abysses of the North Atlantic will interest the special stu- 

 dent. 



Some points in the anatomy of recent Crinoids {Pentaeri- 

 ?ms and Phizocrinits), especially with reference to the blood 

 system of these animals, are discussed by P. Herbert Carpen- 

 ter in the Journal of Anatomy and Physiology. He has also 

 published a morphological account of a newCrinoid from the 

 Philippine Islands, named Actinometra polyniorpha. 



Mr. P. H. Carpenter's essay on the oral and apical sys- 

 tems of the Echinoderms appears in the Quarterly Journal 

 of Microscopical Science for October. The Ophiurans of the 

 English Challenger expedition have been described by Theo- 

 dore Lyman, the larger part being new to science. 



Worms. 



The development of the parasitic worm Ligula has been 

 studied by Duchamp, who made two pigeons swallow some 

 Ligidce from a tench. After four and five days respectively 



