ELIOT : NUDIBliANCHS OF NEW ZEALAND. 337 



cxpancled margin. The anterior margin is divided by a groove which 

 runs a long way back on either side, but there is no median notch. 



The tentacles are two lumps on either side of the mouth, much as in 

 Archidoris tuberculata, and slightly furrowed. The rhinophore pockets 

 are not raised or large. They are surrounded by tubercles similar to 

 those found on other parts of the back and not specially modified. 

 The rhinophores are retracted, thick at the base, somewhat tapering 

 at the top, and bearing 20-25 perfoliations. In one specimen the white 

 rxtrescences extend to the rhinophores. 



The branchial pocket also is not raised and is surrounded by tubercles 

 not specially modified. The rim is bent into about six indistinct 

 undulations. There are nine branchial plumes, of which one is much 

 larger than the rest, and there seem to be some rudimentary, subsidiary 

 plumes round the central anal papilla. The branchiae appear to be 

 tripinnate, not very ample, but prettily shaped and coloured. The 

 stems are stout and reddish, the tips whitish. Nearly all the internal 

 organs are pinkish orange. The blood-gland is large, composed of 

 two clearly separate divisions, each subdivided into 3-4 not very 

 distinct lobes. The ganglia of the central nervous system are elliptical 

 in shape and separate, the cerebral portion being distinctly divided 

 from the pleural portion. Below the buccal mass are two elliptical 

 buccal ganglia. 



The buccal mass is moderately large and not very broad. At its 

 posterior end enter two long (15 x 3 mm.) salivary glands, not 

 ramified but thin, wavy and somewhat folliculate. There is a strong 

 labial cuticle, containing a few scattered rods, but nothing that can 

 be called a labial armature. The radula consists of about 45 rows, 

 cuutaining 65-70 teeth on either side of the rhachis, which lies in 

 a furrow over which the teeth close, so that it is difficult to see. 

 Owing to the innermost laterals being crowded, some of them appear 

 to be in the median line, but they are of the same shape as the rest 

 and do not seem to be real rhachidian teeth. The teeth have large 

 bases and erect cusps slightlj^ bent and moderately stout. The inner- 

 most are smaller. The 2-3 outermost are small, but not denticulate. 



The oesophagus is rather wide (15 mm.) and is not very long. 

 After a contraction it enters the lower side of the stomacli rather 

 far back. Its walls are thin ; those of the stomach are much thicker 

 and bear rather strong laminae inside. The stomach measures 15 mm. 

 by 12, and lies in a cleft in the fore-part of the liver, but is not 

 LiK-losed in the liver. The pear-shaped gall-bladder (8 X 3 mm.) lies 

 below the stomach. The liver is large (33 X 22 mm.), pinkish white 

 outside and yellowish inside. In parts, but not everywhere, it is 

 covered by the reddish- orange hermaphrodite gland. It is deeply cleft 

 in front, and shows traces of bilobation beliind. 



The heart and pericardium are large and distinct. 



The genitalia are well developed, particularly the large mucus gland, 



which in one specimen extends from the branchiae right up to the 



anterior end of the body above the buccal mass. The duct of the 



hermaphrodite gland is very thin, and its ampulla about 2 mm. broad 



|i and 30 mm. long if stretched out. After the bifurcation the female 



