374 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



glass-stoppered bottles and perfectly pure spirit for storing 

 specimens in. 



Finally I thank Prof. Herdman and the Committee for 

 the use of the Port Erin Biolooical Station. 



HYDROMEDUS/E. 



Order ANTHOMEDUS^. 



Family Codonid^. 



Codonium ^pulchellum, (Forbes i5). 

 Sarsia pulchella, Forbes {9) . 

 Syncoryne ptdchella, Allman {4). 

 This species was fairly abundant dinging May and the 

 early part of June, 1893, in Port Erin Bay. The bulb at 

 the base of the tentacles varies in colour in different 

 individuals. It is usually of a brownish colour, but in 

 some specimens either orange, crimson, or greenish. The 

 " Scheitel-Auf satz " — (the prolongation of the manubrium 

 into the substance of the umbrella, forming a kind of 

 apical knob to the manubrium) is present in all specimens ; 

 but the " Stielcanal " (which runs from the apical knob 

 to the ex-umbrella, is not a true canal or tube, but the 

 remains of the original canal connecting the young medusa 

 with its hydroid) in some specimens is very narrow and 

 difficult to see. In a few specimens it is entirely absent. 

 Hseckel divides the genus Sarsia of Forbes into two genera, 

 Codonium and Sarsia. The species of the former genus 

 are characterized by the possession of a " Scheitel-Aufsatz " 

 and a " Stielcanal." The genus Sarsia of Forbes still 

 requires careful revision. 



Codonium pidcheUiim swims actively about an aquarium, 

 and usually has its manubrium and tentacles expanded. 

 It resembles Sarsia tubulosa, Sars, rather than S. pul- 

 chella in its habits. The manubrium and tentacles, when 



