382 



DISCOVERY REPORTS 



The MARGINAL LAPPETS are not pointed and vaulted as somewhat schematically 

 figured by Vanhoeffen (1903, pi. v, fig. 26). In young specimens (fig. 7 a) they are 

 broad and spoon-shaped, and lie side 

 by side. In older individuals they are 

 relatively longer, elongated, and have 

 grown together at their bases so as to 

 form pairs and lie slightly one above 

 the other, Hke scales (Fig. 7 b). 



The WARTS ON THE LAPPETS shoW aS 



a rule the number and arrangement 

 described by Vanhoeffen, but they are 

 larger, much stouter, and do not so 

 much resemble round pearls (" Glas- 

 perlen"), being more like elongated 

 drops. They lose their pigmentation 

 more easily than the deeper lying parts 

 of the lappets and are therefore con- 

 spicuous as white transparent spots 

 between the surrounding dark brown 

 pigment. In many cases I could only 

 distinguish seven warts in the way 

 described by Browne {loc. cit), three 

 on each side, and one in the middle ; in 

 these the innermost warts were miss- 

 ing. In other cases there were five on 

 each side , and one in the middle . Some- 

 times the warts on each side of the 

 rhopalium coalesce to a more or less 

 continuous longitudinal irregular ridge 

 or crista (see Fig. 7 a on the left). 

 Sometimes a few irregularly dis- 

 persed "pearls" are found between 



Fig. 7. y4;o//a f//««/, Vanhoeffen. Pedalia and 

 marginal lappets with "glass beads." 



a, of a young specimen, x 5. b, of an older specimen, x 5. 



the regularly arranged ones, e.g. two median ones. Sometimes a small longitudinal 

 thickening of the exumbrellar jelly is found above the rhopalium itself. A few specimens 

 have eleven warts, four on each side, two in the middle and one above the rhopalium. 

 In several cases the most distal warts near the end of the lappet are the largest and 

 have properly the form of a drop. 



The RHOPALIA show no peculiarities except that they are surrounded at the base with 

 a thick dark brown mantle of pigment, and in several cases I have seen more or less 

 distinct traces of pigment in the stalk of the rhopalium itself. 



