134 DISCOVERY REPORTS 



Here is a list of hitherto unpublished records of capture of C. ovata in closing-nets by R.R.S. 

 'Discovery' and R.R.S. 'Discovery II': 



Clausophyes galeata L. & van R., 1908. 

 Clausophyes galatea (sic) Bigelow, 1913. 



'Discovery II' took a very well-preserved posterior nectophore of C. galeata at Station 1639 off 

 the Antarctic Ice Edge in the Australian basin, in a haul from 2400 to 11 50 m. The posterior end is 

 thick and gelatinous. The emarginate mouth-plate being concave on the dorsal side and convex, with 

 a pronounced median conical projection, on the ventral. The basal ends of the hydroecial folds extend 

 further than in ovata. The basal end of the right hydroecial wing is thick and trihedral, and is over- 

 lapped by the smaller left-hand one. Inside the hydroecium, just below the group of appendages, 

 there is on either side a finger-shaped projection not shown in Bigelow's figure. The musculature 

 of the nectosac is not complete, but the radial canals can be seen in places. The laterals, after ascending 

 obliquely, run down towards the circular canal but turn up again before reaching it to form a second 

 parallel loop. They finally run down again near the ventral radial canal. This nectophore measures 

 43 mm. in length. 



Crystallophyes amygdalina Moser, 1925. 



The only published records of this rare mid-water species are those of Moser's three original types 

 from off the Antarctic continent, and of two specimens from South Georgia reported by Leloup 

 ('Meteor' Expedition, 1 934*2). 'Discovery' and 'William Scoresby' took seventy-three anterior 

 nectophores and twenty-three specimens of an associated posterior nectophore in thirty-seven closing- 

 nets at twenty-nine 'Discovery' stations. The posterior nectophore (Text-figs. 68, 69 B, C) is un- 

 described and appears to belong to this species. 'Discovery I IV 'Atlantic Line' series of stations 

 (661-99) showed that the species was present only at Stations 661, 663 and 671. 



Like most small, deep-water siphonophores the specimens were usually in poor condition, but 

 one or two better preserved specimens have enabled me to add to our knowledge of its morphology, 

 especially of the previously unknown posterior nectophore. 



Moser's (1925) figure of the anterior nectophore does not show the lateral ridges, but she does 

 indicate the characteristic curved ostial end of one. The very minute mouth-plate (Text-fig. 69, 

 Pl.M.) does not curve in under the velum as suggested in Moser's figure. There is a short pedicular 

 canal, as shown in my figure, at the junction of the radial canals. In a well-preserved specimen, what 

 appears to be the scar of attachment of the muscular lamella can be seen continuing for nearly 1 mm. 

 distad to the pedicular canal. There is some variation in the arrangement of the junction of the ridges 



