K0TE3 ON SOME B1UTI.SH NUDIBRANCHS. 35l 



come more regular, and there come about ten colourless dagger-like 

 teeth (Fig. 7. b.), with from four to ten fairly regular denticles on 

 either side, the number of denticles increasing as the teeth are further 

 from the rhachis. After this the teeth, as one goes outwards, become 

 larger, yellower, hollowed, and somewhat spoon-shapeil (Fig. 7. c), bear- 

 ing on either side at least twenty-five denticles, which are shorter and 

 blunter than tliose of the middle teeth. The outermost teeth of all are 

 somewhat smaller. 



The internal organs are not easy to unravel, all the tissues being very 

 thin, soft, and easily torn. The oesophagus leads into a round stomach, 

 which gives ofT branches (apparently two) at the sides, and is prolonged 

 posteriorly in a diverticulum reaching nearly to the end of the body. 

 On this lie the liver and the hermaphrodite gland, which are both 

 yellowish and difficult to separate from one another. The whole mass 

 is surrounded by a network of transparent tubes, which seem to repre- 

 sent the kidney. Tiie dorsal papilUe are hollow and communicate wilh 

 the interior of the body, but I could not satisfactorily demonstrate the 

 existence of branches of the liver in them (cf. what Trinchese says 

 about L. cisiffii). If such exist, they are represented by fiocculent 

 masses of no very definite shape, composed of reddish cells. The 

 mucus and albumen glands are large ; the ampulla of the hermaphro- 

 dite gland long and thick ; the vas deferens thinner and coiled ; the 

 penis conical and unarmed ; the spermatotheca small and roundish. 



If any real distinction can be drawn between L. f/ev,ci and L. eisigii, 

 this animal should probably be referred to the latter in virtue of the 

 shape of the papilhe and the apparent absence of hepatic diverticula in 

 them. But I do not think that the two species are really distinct. 



LOMANOTUS MARMORATUS, A. & H. 



F'our living specimens (A) examined at Plymouth in April, 1905, 

 were about 9 mm. long and 2 mm. broad. The ground colour of the 

 living animals is yellowish white, but largely covered with irregular 

 markings of diderent siiades of brown and olive, and also with small 

 sandy dots. The colour is darkest at the sides and lighter in the centre 

 of the back. The tips of the cerata are whitish ; tlie hepatic diverti- 

 cula within them yellowish brown. 



The foot is cleft, and indented in front with strongly hooked corners. 

 The veil is not large, with four processes, two on each side, which are 

 somewhat bulbous at the tip. The rhinopliorc shcatlis are rather tall 

 for the size of the animal, being about 2 mm. high, and bear four or 

 five processes, the number not being always the same on the right and 

 left sheaths. In one specimen one sheath is entirely smooth. The 



