152 Mr. J. W. Fcwkes on Angelopsis. 



suggestion, cloes not seem to have been shown to be false by 

 Hajckel's criticism. I cannot agree with him tliat they are 

 " probably nectophores," and that if they are aiirophores they 

 may still be " new individuals * budding from the thickened 

 region " &c. as suggested. 



Float. — The float of Angelopsis is spheroidal, the longer 

 diameter being situated in a horizontal plane. The upper 

 portion is somewhat flattened and convex. There is no apical 

 external opening. The longer diameters of the two specimens 

 examined are respectively 5 and 7 millim. 



^ No variation in colour was observed in the external walls. 

 The float is whitish in alcohol f. 



When the external surface of the float is examined with a 

 hand-lens there are observed scattered over its surface clear 

 spaces, c, resembling nematocysts. Similar structures are 

 recorded and figured by me in Rhizophtjsa gracilis from 

 r lorida \. 



Nectocalyces.—^o nectocalyces were observed, although 

 the characteristic elevations from which they are said by 

 Ha^ckel to arise in related genera are prominent. The struc- 

 tures gm, gmm, gm' , which Ha^ckel says " are probably necto- 

 phores, are not '^ nectophores," and have no anatomical 

 features of the nectophores of other Siphonophora. The 

 ease with which nectocalyces are dropped renders it possible 

 that they once existed in Angelopsis ; but as I have not 

 found tJiem they are not described or figured §. 



Fohjp-stem.—ThQ portion of the Angelopsis corresponding 

 to the polyp-stem (siphosome) of other Siphonophores is 

 enlarged into a thick-walled, bulbous, more or less carti- 

 laginous structure, which forms the lower or basal region of 

 the animal. In one specimen this portion is contracted into 

 a globular base of about the same size as the float, and in it 

 forms a dish-like cavity, the diameter of the rim of which is 



_ * Hfeckel in one place (p. 283) considers the aurophore an «or"an" 

 m aiiotlier two hues below, a "peculiar Medusoi^ person." 1 am 

 unable to tell wLich opinion he holds as to its character 

 _ t the marked reddish pigment, which in Athorybia and other o-onera 

 IS lound at the apex of the float, retains some ot' its colour even aftlr 

 specimens have been in alcohol several years 



\ "Notes on Acah'ijluB from the Tortiigas, with a Description of new 

 Genem and Species, ' UuU. Mus. Comp. Zo^il. vol. ix. no. ^ 



§ Hajchel gives a beautiful figure of Stei,haUa v^\i\^ a circle of necto- 



S;iT;.-^''^°-'""^\\'^^^'^ ^?"^^ "^* ^^^"'i'^^ «'« nectocalyces in his 

 spec he diagnosis. He also gives figures of modalia, the nectocalyces 

 ot which are ' semidiagrammatic," and says in his tex , " Of course the 

 orm and position of the detached nectophores ccadd no be receZized in 

 the spirit specnneus with full certainl>^ tlu> solt iellv substance bei no 

 much contracted by the action of the alcohol." ^ ^ -»«^^tantt being 



