298 GASTEROPODES. 
The branchial apparatus is situate in the middle of the back. It seems 
to consist of three quadripartite organs, surrounded by fourteen clavate 
organs, of which latter the number is variable in different specimens. 
The predominant colour of the animal is bluish-white ; the whole 
parts, tips and stems, enlivened by vivid yellow belts and stains. 
The specimen represented spawned, on May 31, an irregular albu- 
minous rope, extending nearly an inch, with pure white ova. Next day 
another portion, considerably smaller, was produced. 
This is a beautiful animal, from the finely contrasted colours. It is 
not common. 
Puate XLII. 
Fic. 15. Doris (Ancula) cristata, back. 
16. Belly, delineated after the specimen spawned. 
17. Tentaculum, enlarged. 
18. Pinnate portion of the branchial apparatus, enlarged. 
19. Rope of spawn. 
20. Portion of spawn, enlarged. 
5. Doris cLavicrrA—The Club Doris.—Plate XLII. Fig, 21. 
Length six lines; breadth between two and three. General figure 
tends to a long ellipse. The body is wholly covered by tubercles and long 
papillary processes ; the latter somewhat clavate, rough, and retractile. 
The form of the head is elliptical, as crossing the direction of the body, 
with a cylindrical white string from each side. A kind of flap, probably 
the margin of a thin cloak, investing the body, projects over it. The 
branchis, consisting of three pinnate organs, rise from near the middle 
of the back. About twelve elongating papillary processes rise erect, near 
the edge of the upper surface. The pinnate organs are all directed up- 
wards, none of them downwards to the lower extremity. 
This is a very beautiful animal. The ground colour seems white ; 
the whole prominences and elongations tipped with vivid orange or 
yellow. It is rare. 
Piate XLII. 
Via. 21. Doris clavigera. 
