REPORT ON THE NTTDIBRANCHIATA. 
77 
It was very much hardened, and measured 14 mm. long by 8 in breadth and 6 in 
height. The colour was, as usual, bluish or bluish-grey, covered with quite small white 
spots on the back and sides, and numerous larger bluish-black spots; upon the mantle 
edge were some of these larger still, and mostly arranged in a row, occasionally alternating 
with rather larger white ones ; the margin of the foot was similar in this respect to the 
mantle edge ; the branchia and rhinophoria were bluish-green ; the tentacles and sole of 
the foot yellowish-grey. 
The shape of the body as usual. The tentacles were retracted and inverted. The 
rhinophoria had each about thirty leaves. The edge of the mantle stands out about 2 
mm. The caudal veil is somewhat wider. At the anterior portion of the lateral margins 
are found the usual small conical bodies which are also present on the hinder margin in 
the region of the branchia, but are stronger. The branchia has about twelve leaves, 
forming a circle, which are like those previously mentioned. The sides of the body and 
the foot I have already described. 
The cerebro-pleural ganglia are thick, the pedal rather more flattened ; the three 
commissures within the common sheath are quite distinguishable. The inferior olfactory 
ganglia are quite sessile and bulb-shaped ; the upper are smaller and spherical. The 
buccal ganglia are a trifle larger than the inferior olfactory ganglia, round in shape, and 
directly united to each other. The gastro-oesophageal ganglia in this specimen were 
spherical, and hardly one-tenth of the size of the preceding pair ; they are developed on 
the side of the nerve. The eyes and otocysts I have already described. The cavity of 
the rhinophoria was of a bluish-green colour, and contrasted with the white nerves. 
The mouth tube, both inside and outside, was of a bluish-green, especially in the anterior 
region. The bulbus pharyngeus was 2 ‘5 mm. long, and of a yellowish-white colour. The 
labial dish was broad, and greenish-yellow in colour, forming a ring which was only 
broken in the middle line, and formed of the usual elements (PI. VI. fig. 1). The tongue 
was short and broad ; its clear yellowish-green radula contained thirty series of teeth ; 
behind twenty-eight developed and four undeveloped series ; the total was therefore sixty- 
two. In the twentieth series of the tongue there were from ninety- four to ninety-six teeth 
on either side. 1 On the narrow rhachis, as in many other species of Chromodoris, were 
small colourless bifid thickenings, which might easily be altogether passed over. The 
teeth (fig. 3) are yellowish in colour; the hook is cleft at its extremity in almost all the 
series ; on the inner margin of the hook of the iunermost tooth is a strong denticle ; 
in the outermost teeth (fig. 2) the bifurcation of the extremity is less conspicuous, and 
the outer margin of the hook irregularly denticulate and the denticles larger in size ; 
in the other teeth there were often seen a few small denticles or tubercles. 
The salivary glands are flattened and ribband-shaped, generally crenate at the 
1 In the earlier specimens investigated by me there were fifty-four to fifty-eight series, and about seventy-two teeth 
in each series. 
