GO 



THE OCEANIC HYDROZOA. 



is closed in for the greater part of its extent anteriorly. The phyllocyst, slightly pyramidal, 

 has no processes, and ends near the apex of the organ. 

 Length of the hydrophyllium, one fifth of an inch. 



This species was also obtained on the southern coast of New Guinea. 



Genus AGLAISMOIDES (nov. gen.) 



Biphyoz'ooids derived from Abyla (?). 



The hydrophyllium is a frustrum of a pentagonal prism, with one face partially 

 bevelled off. The phyllocyst has four caecal processes. The cavity for the polypite is deep 

 and conical, or hemispherical. 



Aglaismoides Eschscholzii. pi. IV, fio-. 2. 



The hydrophyllium is a pentahedral prism with truncated, more or less concave, 

 terminal planes, whose edges are usually strongly serrated. In the position in which 

 all these Cali/cojjhorida are described the posterior face of the hydrophyllium is formed 

 by one of the terminal planes, and is consequently pentagonal. One of the five angles 

 is directed downwards, and, therefore, one of the five faces of the prism is directed upwards. 

 The lower half of the anterior face is, as it were, bevelled off below, and the bevelled area 

 corresponds with the extent of the lower opening of the cavity which shelters the polypite, 

 which is almost hemispherical, and has its axis directed upwards and backwards. 



It extends through not quite half the diameter of the organ, and the edge of its inferior 

 boundary is produced on each side into a tooth. 



The phyllocyst is short and wide, and gives off four csecal processes. Of these two are 

 slender and vertical, the longer passing towards the inferior angle of the hydrophyllium, 

 the other approaching the middle of its superior face, and being inclined backwards towards 

 the posterior face. The two lateral processes are shorter and wider than the vertical ones, 

 and pass forwards and outwards towards the antero-lateral angles, exhibiting a slight 

 curvature or bend about the middle of their length. 



The calyx is four-sided, with serrated edges, and a broad, truncated, and slightly 

 excavated inferior surface, in the middle of which is the small aperture of the nectosac. 

 This cavity has an elongated bell shape, and the duct connecting the radiating canals 

 with the coenosarc terminates close to its apex. The calyx exhibited no manubrium. 



Length of the hydrophyllium, one eighth of an inch. 



This Diphyozooid occurred in all the seas which I traversed. Its curious resemblance 

 to the Afflaisma form of Abi/Ia, with which it used constantly to be taken, is indicated by its 

 name ; and its general characters, more particularly the form of its phyllocyst, leave no doubt 

 on my mind that it is the Diphyozooid of an Abi/Ia. 



