136 DISCOVERY REPORTS 



at the apex of the anterior nectophore. Sometimes all five meet in a point, but the junction of the 

 dorsal and lateral ridges may be separated from that of the ventrals. 



A comparison of the figure of Chumphyes moserae (Text-fig. 66 A) and of the figure of Crystallophyes 

 amygdalina will show an obvious relationship between the two. But in Chumphyes the dorsal and 

 lateral ridges divide below to the apex. 



Text-fig. 68. Crystallophyes amygdalina. Lateral and ventral views of posterior nectophore, 

 'Discovery II' St. 357, 750-500 m., x 13. 



The posterior nectophore of Crystallophyes, hitherto undescribed, is flattened dorso-ventrally in 

 the apical region, and the five ridges do not meet in a point; the ventrals join the laterals at a short 

 distance below the apex. The laterals form prominent pointed teeth at the base. The lateral radial- 

 canals leave the dorsal and ventral radial-canals at a point about a quarter of its length distal to the 

 apex of the nectosac. 



Only after suitable staining is the nature of the ventral ridges apparent. At about the level of the 

 mid-length of the nectosac, the ventral ridges form pointed flaps, between which and their distal 

 continuations open grooves (Text-fig. 69 B) are found. We do not know at present how the anterior 

 and posterior nectophores are articulated, but it would appear as if at some point there is a grasping 

 of some part of the anterior by the posterior nectophore. 



