NARRATIVE OF THE CRUISE. 219 



Bipinnaria (with young starfish). 



Echinid, Ophiurid, and Holothurian larvae. 



Planaria, Distoma (on Sagitta). 



Sagitta (many with Gregarince). 



Sipunculid larvae. 



Terebella, Polynoe, Alciope, Tomopteris, Aphroditacean and other Annelid larvae. 



Tornaria. 



Corycceus, Saphirina, Copilia, Setella, and other Copepods. 



Cythere, Halocypris, and other Ostracodes. 



Hyperia, Phronima, Rhabdosoma and other Amphipods. 



Squillerichthus. 



Mysis, Euphausia. 



Sergestes, Lexicifer, Amphion, Phyllosoma, zoeas of Crabs. 



Halobates. 



Hyalea, Cleodora, Gymbulia, Pleuropus, Spinalis, Pneumodermon, Styliola, and 



other Pteropoda. 

 lanthina, Atlanta, Carinaria, Pterotrachea. 



Phylliroe, Acura, Scyllcea, Glaums, and larvae of other Gasteropods. 

 Cranchia, and other small Cephalopods. 

 Pyrosoma, Salpa, Doliohtm, Appendicularia, Fritillaria. 

 Sternoptyx, small Scopelids, Leptocephalus, young Pleuronectids (Plagusia), 



young of Exocetus, other larval fish, and fish eggs. 



The Radiolaria. — Professor Haeckel, who is engaged in the preparation of a detailed 

 Keport on the Radiolaria, which will shortly be published, has revised and amended the 

 following notes on this group by Mr Murray : — " Of all the classes of marine animals, of 

 which our knowledge has been extended by means of the acquisitions gained by the 

 Challenger Expedition, the Radiolaria must be admitted to be, without doubt, amongst 

 the richest and most interesting. Up to the time of the Expedition scarcely more than 

 (500 species of this remarkable class of Rhizopoda had been recognisably described or 

 portrayed, of which about one half were recent and one half fossil. 



" The number of new species which Professor Haeckel has hitherto been able to 

 distinguish in the rich collection brought home by the Challenger, amounts to more 

 than three times this number, viz., over 2000. Amongst these are found not only very 

 many highly curious and delicate forms, but also a great number of new types, which 

 throw a bright light on the morphology of the whole class, and, as phylogenetic docu- 

 ments, have a special interest for the students of evolution. 



" Our knowledge of the Radiolaria, which now appear to be the richest and most 

 varied in form of all the classes of Protozoa, is scarcely more than half a century old. In 



