SIR C. ELIOT: ON DORIDIID®. 301 
living animal appears as a rich red brown, which is formed of 
a chocolate ground studded with minute yellow dots. On the upper 
surface are the following marks, all of which are edged with a distinct 
broad line of chocolate, caused by the absence of the yellow dots :— 
on the head-shield there is a slender blue T, with the vertical arm 
elongated and a sandy line on the posterior edge; on the hind shield 
is a large sandy crescent, and a slender blue border edging the posterior 
processes; the parapodia have a slender bluish-green margin, near 
which are a few sandy dots. The yellow dots are closer together near 
the chocolate lines, and thus form an indistinct yellow border. 
The alcoholic specimen is 10 mm. long and 7mm. broad. The head- 
shield is distinct, with a posterior flap. The hinder shield is indistinct; 
the posterior appendages are not very long, but separate, and do not 
form a disc. Around the mouth are three prominences, one on each 
side and one above it. The two side prominences are blue, and bear 
bristles ; the middle one is chocolate-coloured, and bears none. The 
pharynx is large, very muscular, and pear-shaped. ‘The intestines are 
bright yellow. The prostate is large and granulate, the verge long. 
The shell is very large, occupying the whole area covered by the 
posterior shield ; it is brown, entirely calcareous, with no membranous 
portion, .and shaped almost asin Philine aperta, only the lip and spire 
are less developed. 
As far as the shell is concerned, this animal seems an interesting 
link between Philine and Doridium. But its digestive organs are 
undoubtedly those of the latter group. 
EXPLANATION OF PLATE XIII. 
Fie. 1.—Doridium reticulatum, u.sp. 
», 2.—Chelidonura (?) hirundinina, var. punctata, n.var. 
VOL. V.—JUNE, 1903. 23 
