92 DISCOVERY REPORTS 



the lappets has two statocysts with very short otoporpae; no peripheral canal. A narrow velum is 



present. 



The presence of otoporpae and the absence of peripheral canals indicate that the larvae here 

 described belong to some species of Cunina. Bigelow (1909, p. 62, PI. 45, figs. 3-7) found a stolon 

 attached to the subumbrella of a Rhopalonema velatum. From the description, it is not quite clear 

 whether the stolon was attached to the host by means of capitate tentacles or whether the primary 

 individual itself attained a medusoid structure. The cluster of medusa buds consisted of several 

 individuals, many of them of about equal size. When liberated they had 6-8 tentacles, the marginal 

 lappets had two statocysts with otoporpae and no peripheral canal. They were supposed to belong 

 to Cunina peregrina. In spite of the larger number of tentacles and lappets (eleven) I am inclined to 

 think that the present specimens also belong to C. peregrina which, among the species of Cunina with 

 more than (normally) eight tentacles, is the only species destitute of peripheral canals. 



Attached to Rhopalonema funerarium 

 (PI. VII, figs. 8, 9) 



St. 2059. 30. iv. 37. 09° 11' 24" S, 05° 17' 24" W. West of Angola, Africa. Net: N 450 B 1900-1400 m. 



The specimen of R. funerarium is fairly well preserved, though without gonads. On the subumbrella, 

 close to the base of the manubrium, a dense cluster of larvae is attached by means of five capitate 

 tentacles of the primary individual, which acts as a stolo-prolifer. The medusoid larvae are very 

 numerous and densely crowded, many of them (at least 15) with a very long proboscis, and several 

 buds have a small umbrella. There is not, as in the other cases described, one single individual much 

 larger than the others, but a fair number are at an equally advanced stage like the one figured in 

 PI. VII, fig. 8. They have eight small, pointed tentacles. The eight marginal lappets are separated by 

 well-developed, fairly narrow peronia. Each lappet has two fairly large statocysts with small otoporpae 

 (PI. VII, fig. 9). No peripheral canals, but a distinct marginal nettle-ring. Velum well-developed. 



These medusae differ from those found in R. velatum by the number of tentacles and lappets not 

 exceeding eight and by the larger size of the marginal clubs. They probably likewise belong to the 

 genus Cunina, but I do not venture to guess which species they may be referred to, possibly to some 

 unknown deep-sea species. 



Attached to Pantachogon haeckeli 



(PI. VII, figs. 10, II) 



St. 85. 23. vi. 26. 33° 07' 40" S, 04° 30' 20" E. West of Cape of Good Hope. Net: N 450 200o(-o) m. 



The specimen of Pantachogon is destitute of manubrium and gonads ; the margin with its tentacle stumps 

 is partly retained, sufficient to identify the species. A cluster of larvae is situated on the subumbrella 

 near the site of the manubrium, which has been lost. The cluster (PI. VII, fig. 10) consists of medusoid 

 buds in different stages of development connected with each other and with the primary individual 

 by irregularly branched filiform bridges. The primary individual is attached to the subumbrella of 

 the host by three fairly long and thin, capitate tentacles, its body is very small and shows no indication 

 of a medusoid structure. The youngest buds are destitute of tentacles and proboscis; they soon attain 

 a single tentacle, which is capitate, other tentacles are developed successively, so that the older buds 

 have a number (4-6) of tentacles of diflFerent sizes, all terminating in a knob-like cluster of nemato- 

 cysts. Simultaneously with the tentacles a long proboscis is developed. When the umbrella begins to 

 appear, the tentacles are seen to be directed upwards. 



Three young medusae had already been detached from the cluster and were found in the subumbrella 

 cavity of the host, retained by the broad velum. One of them is seen in PI. VII, fig. 11. They are 



