45 203 



than the others. The length was 3.2 cm , by a height of the body proper of up to 7 ram , 

 and a breadth of up to 4 mm ; the breadth ot the foot was 3 mm ; the diameter of the ten- 

 tacle-star was 2 mm ; the height of the rhinophore together with its papilla was 7 mm , and 

 that of the second and third dorsal papilla was the same. 



The form was upon the whole as usual. The tentacle-star had about 12 papillae 

 arranged in 2—3 circles; the papilla of the rhinophore was slit into 3 — 4 laps above; 

 the second pair of papillae showed 3 laps, outwardly at the base 3 small finger-shaped 

 appendages, and inwardly 2 — 3 branchial tufts; the third pair was also three-fingered 

 above, also with 2 — 3 similar appendages outside and two gills inside ; between the second 

 and third papilla the anus, and before it the renal pore, was found; the fourth pair of 

 papillae had 2 — 3 fingers, with 2 appendages and 2 gills; the fifth pair had 2 appendages 

 and one gill; the sixth papilla was situated medianly, finger-shaped, with appendage inside 

 and outside, but no gill, and the smaller, likewise median seventh and eighth papillae had 

 neither appendage nor gill. 



The hepatic mass shone through the sides of the body with a gray colour, the 

 anterior genital mass whitish. 



The central nervous system was quite as before described (comp. 1. c. p. 38). The 

 oval otocysts had a largest diameter of - 16 mm , and were closely filled with otoconia of a 

 diameter of up to (>025 mm . The eyes had a diameter of0'28 mm , the lens was strong yellow. 



The bulbu s pharyngeus was of the common form, 3 mm long and broad, by a 

 height of 2"5 mm ; the labial plates were, quite as in the other species, shining yellow 

 brown, darker farther down in the mouth-slit; their scales had a breadth of up to 0'09 mm . 

 The muscular plate covering the mandibles, was of the common thickness. The man- 

 dibles themselves showed the common form (comp. 1. c. PI. VIII, Fig. 2 — 3); they were 

 yellow, dark chestnut along the masticatory edge, of a breadth together of 3 mm by a length 

 of 3 mm . On the inside of the cheeks and on the palate, a strong, smooth, yellow brown 

 cuticle-lining was found. The tongue was of the common form, with yellow radula. In 

 the latter 13 series of tooth-plates, in the sheath in all 21; thus the total number of 

 series was 34. The number of lateral plates was up to 16. The median tooth-plates were 

 yellow, the lateral ones yellowish; the height and breadth of the median plates was0.08 mm ; 

 the length of the lateral ones was up to 0"2 mm . The median plates were as before described, 

 the number of denticles on either side was 10 — 12; the lateral ones as in other species 

 (comp. 1. c. PI. VIII, Fig. 4—8). 



The salivary glands were as in the other species. 



The short oesophagus passes into the first-stomach (Fig. 4 a), which posteriorly 

 on either side receives a short biliary duct, and besides, quite posteriorly to the left, the 

 duct of the. principal liver (Fig. 4 b b-c). This stomach passes through a slight narrowing 



26' 



