258 TRANSACTIONS LIVEKPOOL. BIOLOGICAL SOCIETY. 



of the tentacles, some distance from the base. Green 

 has read St een strap's description of Goryne fritillaria 

 and states that there is a strong resemblance between the 

 two species,, but does not think that they are the same. 

 Haeckel however believes that D. islandica is the same 

 species as A. fritillaria. Steenstrupia owenii is very 

 much like D. islandica in shape. It differs from it in 

 possessing only one tentacle on the tentacle bulb. A 

 Stielcanal is also present, running from the top of manu- 

 brium to the ex-umbrella. Three medusa-buds at the base 

 of the large tentacle. Haeckel believes that this species 

 is probably the same as Hybocodon prolifer, Agassiz. It 

 is interesting to notice that these specimens were taken 

 on the coast of Ireland nearly opposite the Isle of Man. 

 Haeckel describes another species of Amphicodon — A. 

 amphipleurus , which he found on the coast of Normandy, 

 at Granville. It has three tentacles on the large tentacle 

 bulb on the longest side of the umbrella, and the usual 

 five rows of nematocysts on the ex-umbrella. It differs 

 only from the other species of Amphicodon in possessing a 

 larger number of medusa-buds on the large tentacle-bulb, 

 and in having a stiel-canal. The radial-canals, ring-canal 

 manubrium, tentacle-bulbs and tentacles of a crimson 

 colour. All the medusse of Amphicodon fritillaria must 

 have a Stielcanal on leaving the hydroid, but it usually 

 disappears later in life. I saw one adult specimen at Port 

 Erin with a Stielcanal. In some species of medusse the 

 Stielcanal remains throughout life ; in others it disappears, 

 but occasionally may be present in adult specimens. 



Family Tiakim;. 



Tiara pileata, (Forskal 15). 



Oceania episcopalis, Forbes (9). 

 The medusa was first taken by Forskal in 1775. Since 



