53 211 



The length of the smaller specimen was 9 mm , that of the larger one M mm , the 

 measures below refer to the latter. The height of the body proper was 2'5 mm , the hreadlh 

 (of the back) up to 4 mm , l mni on either side belonging to the dorsal brim; the length of 

 the tentacles was l mm , the height of the rhinophores 2 mm , the length of the dorsal papillæ 

 up to 7 - 5 mm (by a diameter at the base of 0'Ç> mm ); the breadth of the foot was in the 

 middle 25 mm , nearly l mm on either side belonging to the foot-brim, the length of the 

 foot-feelers 2 mm , of the tail 3 mm . — The colour was upon the whole whitish; the brown- 

 gray liver-lobes were distinctly seen shining through in the papillæ, and the yellowish liver 

 was to be discerned everywhere through the body. 



The form was elongated and rather narrow, posteriorly the tail projected over 

 the body. The head showed well developed, but not long tentacles; the rhinophores were 

 not long-stalked, the club had about 30 leaves (on either side of the rather broad rhachis) 

 and end-papilla. The back proper was narrow, but with a thin, relatively broad brim, 

 which projected into 7—8 little conspicuous, short and rounded lobes, on which the 

 papillæ were placed in curves; of such curves 9 — 10 seemed to be present, and in the 

 curves 4- — 7 papillæ seemed to be found; the number of papillæ appeared on either side 

 to be 50 — 60; the back proper was even, as it were somewhat sunk between the brims, 

 and, with the exception of the very hindermost part, naked. The papillæ were cylindric, 

 a little tapering above, very closely adhesive (non caducae), the outermost ones were short, 

 the innermost ones (2 — 3) very long, often (in the dead state) wound round others by 

 which fact the determination of the distribution into series became very difficult and some- 

 what incertain. The sides of the body were rather low, somewhat sloping inward; the 

 genital papilla was found in the usual place; the anal papilla was lying between the Grst 

 and second third parts of the length of the body, in a notch in the dorsal brim, in the 

 margin of the back. The foot was anteriorly rather broad, with a marginal furrow, con- 

 tinuing through the rather long foot-feelers; the foot-brim was rather broad; the tail in 

 which the back by and by passes, rather long, flatly tapering. 



The cerebro-pleural ganglia were roundish, of almost double the size of the 

 more oval pedal ones, the commissure ot which was of about half the length of one of 

 the ganglia; the large olfactory ganglia were a little larger than the pedal, globular (of 

 a diameter of - 25 mm ). — The almost sessile eyes had a diameter of 0'075 mm ; the glo- 

 bular otocysts had a diameter of 0'08 mm , and were closely filled with otoconia of the 

 common kind. 



The buccal tube was surrounded by a strong glandular layer. — The b u 1 b u s 

 pharyngeus had a short-oval form, l - 5 mm long, the radula-sheath projected a little 

 posteriorly. The mandibles were brown yellow; the hinge-part was not strong; the masti- 

 catory process was rather short; the masticatory edge, of a breadth of up to 0"06 mm , was 



27' 



