29 187 



In the former the length of the foot was 1 1 -5 mm , by a breadth of up to 4 mm ; the height 

 of the body was up to 3 mm ; the length of the dorsal appendages was up to 4 - 5 mm , that 

 of the gill leaves up to 2-5 mm , that of the rhinophores 2-.5 mm , and of the tentacles O^o 111111 ; 

 the length of the tail was 2.25 mm . 



The contour of the body was somewhat lengthened-oval. The back was little 

 arched; the appendages rose from the slightly projecting edge all around with rather 

 regular short distances between them; only between the two foremost and the two hinder- 

 most ones the distance was a little greater. These appendages , papillae (epinotidia) were 

 all more or less club-shaped, narrower below, thicker and rounded above, almost of the 

 same size, here and there 1 — 2 smaller ones (reproducing) were found; they were smooth 

 on the surface, not falling of. Anteriorly two (frontal) appendages were found, posteriorly 

 two (caudal) ones, and on either side by the two individuals 6, by the others 7 appendages. 

 The beautiful, slender, strong rhinophores had a short stalk and a not much perfoliated 

 club, with an end-papilla; the number of the leaves was about 25. The rather large 

 gill formed of 10—12 leaves, was placed in a large bow quite posteriorly on the back; 

 the simple leaves decreased posteriorly irregularly in size; on the inside of the leaves 

 (flg. 15) on either side of a quite narrow rhachis, a not large number (up to 15) of 

 transverse folds was found. The only slightly projecting anal papilla was found posteriorly 

 in the rather wide opening of the bow made by the gill. In all the specimens is found 

 medianly, about midway between the rhinophorium and the gill, a single papilla, of about 

 the same size as the marginal papillæ, and otherwise of the same kind. The sides of the 

 body are rather low, anteriorly on the right the genital opening is seen. The rather strong 

 head is flattened anteriorly; above it is on either side produced in a short tentacle. The 

 foot is rather strong, rounded anteriorly; the foot-edge is only little prominent, the flat- 

 tened tail roundly pointed. 



The intestines shone nowhere through. 



The central nervous system was almost quite like that of Idalia elegans 

 (comp. 1. c. Taf. VI, Fig. 1 — 3). Neither was here found any ganglion olfactorium distale ; 

 but on the contrary, as in the former species, a ganglion genitale. The nerve cells had 

 a diameter of at least up to - 10 mm . 



The eyes were almost sessile, of a diameter of - 06 mml ). The otocysts were 

 attached to the pedal ganglia, of a diameter of O'OS™ 11 , with rather numerous otoconia of 



In one specimen two eyes not far from each other were seen on one side, one of which was 

 somewhat smaller than the other. 1 have before seen a similar duplicity of the eye in 

 Phidiana lynceus (Vidensk. Meddelels. fra den naturhist. Forening i Kjobenhavn f 1S66. 1S67. 

 p. 10S. Tab. IV, Fig. 1, 2, 4). 



24* 



