ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 531 



tlie Canary Islands. Some of them are interesting because of tlieir 

 peculiarities of structure, and others because they are forms which 

 unite groups which hitherto appeared to be isolated. Before com- 

 mencing tlie detailed account of the species which he observed, Prof. 

 Chun makes some remarks on the recently published views of Prof. 

 Haeckel. 



With regard to the proposed division of the Siphonophora into two 

 subclasses, Prof. Chun urges that Haeckel has founded his speculations 

 on two larval forms of very difierent morphological value. The Velel- 

 lidat certainly represent not only the most complicated in structure, but 

 also the most divergent of the Physophoridte ; but there is no feature 

 in their organization which cannot be exj^laiued by gradual adai)tation 

 to an existence at the surface of the sea. The author would propose to 

 divide the order Physophoridte into two suborders, one of which would 

 include all with an uuchambered pueumatoiihore functioning as a gas- 

 gland (HajylojjJiysse), while in the other there would be the (partially) air- 

 breathing Velellidfe {^Traclioj^lnjsse) with a chambered pneumatophore, 

 stigmata, and trachese. Prof. Chun also urges I'easous against Haeckel's 

 Medusa-theory of the morphology of the Siphonojjhora. 



Among the new forms described are Doramasia g. n. for Erssea 

 Bojani Esch., and D. pida sp. n. ; in it the nectocalyx is diphyidiform, 

 slender, with a long apex to the subumbrella drawn out in the form of a 

 tube, and the Eudoxiae have special nectocalyces ; in Halopyramis g. n. 

 the nectocalyx forms a broad, four-sided, tetragonal pyramid, the 

 hydroecium is infundibuliform, with a projecting denticulate margin, the 

 oil-receptacle is very large and situated in the axis of the pyramid, the 

 subumbrella is excentric, the stem is abbreviated and not protrusible, 

 while the Eudoxise have no special nectocalyx, and become free as in 

 Cuboides. 



The family Amphicaryonidie is formed for Amphicanjon g. n. ; in it 

 the nectocalyces have a romided exumbrella, and the stem is metamor- 

 phosed into a disc ; the bud-grouj)s are set free as diplophysiform Eudoxife. 

 The Stephanophyidaj contain the new genus Stejjhanojihyes, and are defined 

 as Calycophoridfe with four nectocalyces placed like a wreath in the 

 same plane, and with heteromorphous tentacles. In the internodes of 

 S. superha sji. n., the heteromorphous tentacles which have been as yet 

 found only in Stephanophyes among the Calycophoridfe, are found placed. 

 This species is, of all the Siphonophora known to the author, the 

 most delicate, and one of the most magnificent. It is perfectly trans- 

 parent, and may be as much as 18 inches long. " The graceful play of 

 its heteromorphous tentacles, the energetic pumping movements of the 

 large " calyces and the numerous special nectocalyces, the bright red 

 colouring of the knobbed fluid vessels with their shining oil-drops, the 

 delicate rosy or emerald-green shimmer of the gastric polyps, the jierfect 

 transparency of the largo globular ova, and the delicate flesh-tint of the 

 male manubria all combine to mark Steplianophyes as one of the most 

 splendid objects among pelagic animals." This interesting form passes 

 through a remarkable metamorphosis. The youngest specimens, which 

 are perfectly transparent, and therefore easily escape even the practised 

 eye, display the characters of the genus Lihjopsis ; they possess two 

 nectocalyces with the fluid-canal only once divided dichotomously, and 

 are completely devoid of the heteromorijhous tentacles found in the 

 internodes of older groups. This new gemis unites the Prayidse and 



