122 



MEDUS.E OF THE WORLD. 



According to Wright, 1859 (Edinburgh New Philosoph. Journ., plate 8, fig. i) and 

 Hincks, 1868 (British Hyd. Zooph., p. 14, plate 3, fig. l), the egg of Turris neglecta develops 

 into a Tubulanan hydroid. Clavula gossei (see also Allman, 1871, Monog. Tubularian 

 Hydroids, p. 259; also Metschnilcoff, 1886, Arbeit. Zool. Inst., Wien, Bd. 6, p. 239) found 

 that the eggs of Tiara pileata develop into a clava-like hydroid polyp. The hydroid polypites 

 of Turris (Clavula) arise singly from a creeping stolon. Each polypite is slender, elongated, 

 and claviform with scattered, elongate tentacles. The coenosarc is invested by a polypary. 

 It is possible that the hydroid described by Gegenbaur, 1854 (Verhandl. phys.-med. Gesell. 

 Wiirzburg, Bd. 4, p. 165, taf. I, figs. 3, 4) may prove to be the hydroid of Turris. The short, 

 clavate polypites arise separately from a somewhat branching stolon, and each has 5 to 8 

 scattered, slender tentacles. The medusa-buds arise from the stolon and when set free each 

 medusa has 2 long and 2 immature tentacles, and a line of nematocysts extends up from each 

 tentacle-bulb to the top of the bell. Gegenbaur calls this form Clcodoru tricuspiJata or 

 Syncoryna cleodorir. Allman, 1871 (Monog. Tubularian Hydroids. p. 260) calls it Cam- 

 paniclava. 



It is probable that certain species of Perigonimus give rise to medusae of the genus Tun-is. 



Corydendrium minor Nutting, 1905 (U. S. Fish Commission Bulletin for 1903, p. 941, 

 plate 2, fig. I ; plate 7, figs. 8, 9) from the Hawaiian Islands may be the hydroid of some Turris. 



Turris neglecta Lesson. 



Kfnnin beroe, SLABBER, 1778, Physikal. Belustig., Niirnberg, p. lio, plate 13, fig. 3. 



Turris neg/ecla, LESSON, 1843, Hist. Zooph. Acal., p. 284. FORBES, 1848, British Naked-eyed Medusa 1 , p. 23, plate 3, figs. 



za-2.1. 



Oceania globulosa (young?), FORBES, 1848, British Naked-eyed Medusa 1 , p. 29, plate 3, fig. 3. 

 Turris neglecta (hydroid ?), GOSSE, 1853, Nat. Rambles Devonshire Coast, p. 348, plate 13, figs. 6-10. 

 Clavula gossei, WRIGHT, 1859, Edinburgh New Phil. Journ, plate 8, fig. l. 

 Turris neglecta, HINCKS, 1868, Hist. British Hydroid Zooph., p. 13, plate 3, fig. I. ALLMAN, 1872, Monog. Tubularian Hydroids, 



p. 259. HAECKEL, 1879, Syst. der Medusen, p. 62. BEDOT, 1901, Revue Suisse de Zool., tome 9, p. 488, Ibid., 1905, 



tome 13, p. 152 (all literature to 1850). 



Tabular Synopsis of the Species of Turns Continued. 



*T. conifera rotunda, superba and prhmatica are probably identical with T. pileata. Hydroid: Perigonimus ref>ens? 

 (Hydroid: Clavula gossei Wright. 



