gery o Zoology. , aay 
now show a weak segmentation, but the appendages as yet Jack 
` and fourth pairs of feet. No trace of it occurs in the adult. . Its 
unction is extremely problematical, and Croneberg only recalls 
similar organs in the embryos of Asellus. 
curved horns with the other. Each half then proceeded to 
develop an envelope and the missing horn or horns 
dylophora whitelegget. He also shows that the name Hydra 
EcuinopEerms.—P. H. Carpenter, in a note in Nature, says that 
the cysts on Comatula rosea, which he regarded as indicative of 
the existence of a British species of Myzostoma, prove not to be 
caused by those animals, but by a problematical organism re- 
sembling an egg in an early stage of segmentation, but in the 
poor state of the material at hand not capable of being carefully 
hand 
of the Echinoderm fauna of Bering Sea. . 
Worms.—Villot gives (Ann. Sci. Nat., VIL, i.) a supplementary 
revision of the hair-worms (Gordiacez), which changes somewhat 
his former paper of a dozen years ago (Arch. Zool. Exp) He 
