26 DISCOVERY REPORTS 



The tentative scheme outlined by Garstang (1946, p. 190) treats the Chondrophora and the 

 Siphonantha as two suborders: 



I DISCONANTHA— Order CHONDROPHORA 

 II SIPHONANTHA 



A PHYSOPHORIDA 



(1) Cystonecta 



(2) Amphinecta ( = Physonectae Haeckel) 



B CALYCOPHORIDA 



On grounds of priority Eschscholtz's old name Physophorae should perhaps be retained in preference 

 to Garstang's new one Physophorida, Haeckel's old name Physonectae for Amphinecta, and Calyco- 

 phorae for Calycophoridae. 



I doubt whether Garstang's Cystonecta ( = Rhizophysaliae Chun) and Amphinecta ( = Physonectae 

 Haeckel) are more closely related to each other than are his Amphinecta and Calycophorida 

 ( = Calycophorae Leuckart). And I believe that the Chondrophora are as distantly related to the 

 Siphonophora as the Margelopsid genera Pelagohydra, etc. So the outline of the revised classification 

 I have adopted is: 



Order CHONDROPHORA (Chamisso & Eysenhardt, 1821) 

 =DISCONANTHAE Haeckel, 1888 

 Genera Velella, P or pita, Porpema 



Order SIPHONOPHORA (Eschscholtz, 1829, part) 

 = SIPHON AN THAE Haeckel, 1888 



Suborder CYSTONECTAE Haeckel, 1888 



= 'PNEUMATOPHORIDEN' Chun, 1882 

 = RHIZOPHYSALIAE Chun, 1897 



Suborder PHYSONECTAE Haeckel, 1888 



= PHYSOPHORAE Eschscholtz, 1829 (part) 



Suborder CALYCOPHORAE Leuckart, 1854 



[Order HYDROIDA 



Suborder ANTHOMEDUSAE 



Family MARGELLOPSIDAE 

 Genera Pelagohydra 



Margelopsis (haeckeli) 

 Climacocodo?i] 



Much more work and consideration is needed before a sound and detailed classification of 



Siphonophora can be arrived at, but for the sake of planktonologists and others who handle these 



animals, the following very tentative arrangement of Calycophoran genera is suggested. The first genus 



contains what are probably the most simply organized siphonophores, and the last the most highly 



evolved 



Suborder CALYCOPHORAE 



Family 1. SPHAERONECTIDAE 

 Sphaeronectes 



Family 2. PRAYIDAE 

 Nectopyramis 

 Rosacea 



