MEDUSAE. 157 



SCYPH0MEDUSJ1. 



CHARYBDEIDA. 



Charybdea, Peron et Lesueur, 1809. 

 Charybdea, sp. ? 



There is a single specimen in the collection from the pearl banks, and it is not in a 

 first rate condition. The umbrella has become soft and limp, consequently it has 

 collapsed and lost its natural shape. The umbrella measures about 75 millims. in 

 length, and is probably cone-shaped. The stomach is very short and flat ; the 

 mouth has small lips. The gastric filaments appear to be perradial in position (the 

 top of the umbrella is damaged and crushed in). Each of the four groups is 

 composed of about six tufts of filaments packed so close together as to form a 

 continuous row. The sense-organs are about 10 millims. away from the margin of 

 the umbrella. There are four ocelli on the inner side of each tentaculocyst. The 

 principal ocellus is very large and semi-globular in shape. Above it, a little nearer 

 the base of the tentaculocyst, is a transverse ocellus, forming a narrow pigmented 

 band. The other two ocelli are more lateral in position, and situated between the 

 semi-elobular and the transverse ocelli. The ocelli are of a reddish brown colour in 

 formalin. The velarium contains seven unbranched canals between every two 

 tentacles. The gonads form very narrow bands, and appear to be quite immature. 

 The pedalia are about 20 millims. in length and 1 5 millims. in width. The shape of 

 their wings and the tentacle resemble the figure of Charybdea grandis (Agassiz and 

 Mayer, 1902, plate vi.). 



This may be an immature specimen of Charybdea grandis, but I remain uncertain. 

 A second specimen would have been an advantage for comparison. 



CORONATA. 



Family: NAUSITHOID^l, Haeckel, 1879; ex Vanhoffen, 1902. 



Nausithoe, Kolliker, 1853. 



Nausithoe punctata, Kolliker, 1853. 



Nausithoe punctata, Vanhoffen, 1892, p. 13, Taf. iii., figs. 8 and 9; Mayer, 1900, p. 67, 

 plate xxiii., figs. 67 and 68, plate xxvi., figs. 87 and 88; Vanhoffen, 1902, p. 29; 

 Bigelow, 1904, p. 263, plate vi., fig. 21. 



Description. The umbrella is somewhat hemispherical in shape. At the top of 

 the umbrella there is a distinct hemispherical crown which is separated off from the 



