34 Proceedings of the Royal Physical Society, 



have to be formed for their reception, for which I propose the 

 name of Salpistes, from <raX<mrj}g, a trumpeter. 



Since the above was written, my friend Mr Alder has in- 

 formed me that he has also discovered L.producta near Tyne- 

 mouth. 



III. Observations on British Zoophytes. — (1.) On the Reproduction of 

 Turris neglecta. (2.) On the Development of Hippocrene (Bougain- 

 villea) Britannica (?) from Atractylis (Eudendrium) ramosa. (3.) On 

 the Development of Hydra Tuba (Strobila) from Chrysaora. By T« 

 Strethill Wright, M.D. 



Description of Plate III. 



Fig. 1. Clavula Gossii, proles Turris neglecta;. 



2. Hydra tuba {Strobila) in various stages. 3. Corallum of same. 



1. On the Reproduction of Turris neglecta. 



The only observations that we have as to the reproduction 

 of the gymnopthalmatous Medusae are those of Mr Gosse with 

 regard to Turris neglecta. He is the pioneer who first ac- 

 tually witnessed, or rather caught a glimpse of, the reproduc- 

 tion of a hydroid zoophyte from a recognised species of Me- 

 dusa. In September 1852, he saw the oval purple gemmules 

 of Turrts neglecta escaping from the walls of the ovaries, and 

 dropping down to the bottom of the vessel in which they were 

 confined, where they moved slowly about by means of their 

 vibratile cilia. He placed a number of these gemmules in a 

 properly-constructed cell, and, by watching them, ascertained 

 the following facts : — " The gemmule (says he) having ad- 

 hered to the glass, grows out into a lengthened form, vari- 

 ously knotted and swollen, and frequently dividing into two 

 branches, the whole adhering closely to the glass. After a 

 day or two's growth in this manner, a perpendicular stem 

 begins to shoot from some point of this creeping root, and 

 soon separates into four straight, slender, slightly divergent 

 tentacles, which shoot to a considerable length. The little 

 creature is now a polyp of four tentacles." At this stage 

 they all died, and he never succeeded in repeating his ob- 

 servations. In August last, I picked up at Queensferry a spe- 



