THE MEDUS.i:. 177 



2 mm. in -width. Tiie shape of the umbrella is similar to that in the specimens figured 

 by Maas. The peduncle of the stomach is very short, about one-sixth tlie length of the 

 umbrella. The gonads are upon the peduncle, just above the stomach. At first the 

 gonads are little oval or globular swellings, and as they increase in size they become 

 cylindrical and hang down. A specimen 3 mm. in height had cylindrical gonads about 

 1-25 mm. long and 61 tentacles. Only one specimen was seen with tentacles, and it had 

 a nearly complete set in a closely contracted state ; all the others had only the roots or 

 stumps of the tentacles remaining. 



Occurrences : Surface. 21 1 (1), 23 b (1), 32 c (2), 33 a (3). 



25 to fathoms. 30 h (4), 30 m (24), 31 a (12), 32 b (1), 31 g (2), 35 lo (3). 

 50 to fathoms. 30 d (12), 30 I (3). 



75 to fathoms. 30/ (13), 32 g (1), 32 o (2), 85 a (2), 35 c (5), 35 ij (3). 

 100 to fathoms. 21 A (1), 30^ (11), 30 A (16), 31 fZ (1), 35/ (2), 



35 X (1). 

 It was occupying a zone extending from the surface down to 100 fathoms. 

 Distribution.— -The tropical and subtropical waters of the North Atlantic and Indian 

 Oceans. 



Aglaura hemistoma is widely distributed over the warm-water area of the North 

 Atlantic, and it also occurs in the Mediterranean. The ' National ' Plankton Expedition 

 did not find it north of latitude 45° N. 



Order NAECOMEDUSJ]]. 



Eam. C U N A N T H I B iE. 



CuNOCTANTHA FOWLERi, nova spccies. (PI. 13. figs. 1 & 2.) 



Description of Sjiecics. — The umbrella is watchglass-shaj)ed, about three times as broad 

 as high. The stomach is circular, with eight lateral pouches extending to the margin of 

 the umbrella. Upon the pouches of the stomach there are medusa-buds, which are not 

 parasitic. Eight rather long tentacles. Five sense-organs upon each of the eight 

 marginal lobes. 



Size : Umbrella about 4 mm. in diameter. 



Occurrence: 50 to fathoms. 31b (1 specimen). 



There is only one specimen, which is in fairly good condition. The umbrella is 

 slightly crumpled and its margin is curled inwards. The velum has broken away and 

 only slight traces of it remain. The mouth is expanded and circuhxr in shape. The 

 pouches of the stomach are broadest in the middle and become narrower as they approach 

 the margin of the umbrella. Upon the pouches of the stomach there arc one to three 

 medusa-buds showing various stages of development. There are no gonads present, but 

 they should appear at a later stage, after the gemmation-period is over. The length of 

 the tentacles is about equal to tlie diameter of the umbrella, and they taper out to a 

 fau'ly fine point. The peronial groove is broad and shallow, and contains a band (the 

 peronium) of nematocysts, which broadens out at the bases of the tentacles. The lobes 



30* 



