138 PROCEEDINGS OF THE MALA.COLOGICAL SOCIETY. 



lateral branches of the gills stand vertically, so that the gills form 

 a cabbage-shaped tuft, rather than a flat rosette Autotomy of mantle- 

 edge during apparently healtby life. Colour light grey with darker 

 spots which are ^mall and irregularly scattered, gills and the rliinophores 

 coloured like the bodv, perforations of rhinophores rather darker. 

 Under side uniformly white. Foot grooved and notched. Tentacles 

 small but pointed." 



The preserved specimen is 47"5mm. long and 19 high. The breadth 

 is about 30, but the edges of the mantle have been thrown oif. It 

 would appear that this margin was ample when it was complete, 

 and measured about 15 mm. The colour is pearly grey, mottled in 

 places, but not everywhere, with rather darker greyish spots, which 

 are sometimes confluent. The back is minutely granulate, and in 

 most places feels quite smooth, but here and there the granulations are 

 covered with a hard, white deposit, and in these patches (the largest of 

 which measures about 5x3 mm.) the skin feels harsh and rough. The 

 general consistency is waxy. 



The foot is grooved and notched in front. The tentacles are rather 

 small, but distinct and pointed. The left is bifid, which is no doubt 

 a monstrosity. The gill and rhinophore-pockets are completely closed, 

 and invisible from the outside. There is no trace of a raised rim 

 or tubercles, but the inside of the gill-pocket looks as if it might have 

 been stellate when open. The rhinophores are stout and yellow. The 

 branchiae consist of six main plumes, but one is deeply divided, so that 

 they might be counted as seven. They have a faint green tinge and 

 are tri- or quadripinnate, stout, but not ample, with broad stems and 

 somewhat scanty ramifications. 



The integuments are thick, and contain a dense mass of rod-like 

 spicules which have a tendency to arrange themselves in a reticulate 

 pattern. On removing them is seen the liver, covered by the yellowish 

 hermaphrodite gland, contrasting markedly with the other organs 

 (buccal mass, oesophagus, stomach, etc.), which are waxy white. The 

 strong labial cuticle bears an armature of two very distinct, triangular, 

 brown plates, composed of a dense collection of longish rods which can 

 be seen separately only at the edges. The radula consists of 30 rows 

 of teeth, of which 20 seem to be in use. The rows contain at most 40-45 

 teeth on each side of the rhachis, but many are much shorter. The teeth 

 near the rhachis are smaller than the others, and very irregularly 

 arranged, being apparently easily displaced. Those in the middle of 

 the half-row are largest : the outer 8 or 1 begin to decrease, and the 

 two or three outermost are markedly smaller, but not rudimentary. 

 There are two yellowish salivary glands, about 5 mm. long and 2*5 

 broad. The long, thin ducts measure about 12 mm. The oesophagus, 

 13 mm. long, runs straight to the stomach and enters its under side. 

 The stomach (12 mm. long, 6-5 ram. broad) has moderately strong 

 walls and lies on the front part of the liver, completely outside it. 

 The intestine is long. The oesophagus, intestine, and stomach are 

 all laminated internally. The liver is large, and, as preserved, is 

 drawn up into a sort of globular dome at the back. It shows signs 

 of a division into several lobes, and is very loose in texture, with 



