184 K. :\riTsrKURi : studier on 



of dorsal papillae. In the first specimen, length C.2 cm., breadth 

 1.6 cm., pedicels on each side 47 — 48 in number, and dorsal 

 papilla3 18 — 20; in the second, length 4 cm., breadth 0.9 cm., 

 pedicels 31 — 32, and dorsal papilla? 12 — 15. Owing to the small 

 size of the animal and the large number of the lateral pedicels, 

 the latter become necessarily smaller than is generally the case 

 in the species of Lœtmogone or llijoclcvmon, and appear crowded ; 

 in fact, some parts of the row^ appear double or at least alternate- 

 ly double. Tlie diameter of tlie dorsal papillae is about the same 

 as that of the lateral pedicels. 



The tentacles number 15 and are relatively large. In one 

 specimen their tips are deep violet ; in another, yellowish. The 

 tentacular disk, in the center of Avhich the mouth is situated, is 

 obliquely situated so that the dorsal surface is considerably 

 longer than the ventral surface, and the mouth faces decidedly 

 ventrally. 



The calcareous deposits are characteristic : they are large 

 wheels, small wdieels, and rods. ( i ) Large wheels are confined 

 almost exclusively to the dorsal perisome, wdiich has besides 

 these, at the most only a few small wheels scattered far between. 

 The large wheels have almost without exception twelve spokes, 

 and six unequal central holes (textfig. 33rt). Their sizes are 

 variable, the largest being about 0.18 mm. and the smallest 0.08 

 . mm. in diameter. There are all intermediate stages, (ii) Small 

 wheels are found in the ventral perisome, the dorsal papilla?, and 

 lateral pedicels. These have, also almost invariably, twelve spokes ; 

 but the central holes are as invariably four in number (h) and about 

 0.04 mm. in diameter. At the same time there are some 

 which may be said to be between the large and the small wdieels, 

 and may be called middle-sized : thus, in Spec. No. 1519 there are 



