NUDIBEANCHJATE MOLLUSCA FEOM THE EASTERN SEAS. 129 



Of this magnificent species I dredged one specimen in GO fathoms, off Recruit Island, 

 North Pacific, about 150 miles N.E. of Formosa. It was quite lively, and lived several 

 days, moving freely about, and floating foot uppermost, but never showing any tendency 

 to leave the surface of the water. I have named it after Captain Charles Bullock, R.N., 

 a gentleman greatly interested in these studies, and from whom I met with much 

 assistance and courtesy. 



Chromodoris aureo-purpurea, Coll., n. sp. (Plate IX. figs. 18-22.) 



Length 1| inch. Bod;/ entirely covered by the mantle, except a small portion of pos- 

 terior end of the foot. Mantle ample, entire, smooth, broad anteriorly. In a second 

 specimen the edge of the mantle was somewhat indented in one or two places. Dorsal 

 tentacles small, club-shaped, upon cylindrical footstalk, curving backwards and outwards ; 

 the club-shaped portion finely laminated. Branch'ue of ten leaflets, forming a small 

 double ring ; the leaflets conical, pinnate, and diminishing in size from before backwards. 

 Foot slightly projecting behind mantle. Head rounded in front, with two minute oral 

 tentacles at the sides. 



Colour and general appearance. — Upper surface with a general yellow tinge, and 

 covered over with small, irregular blotches of bright yellow, of a roundish or elliptical 

 form. Mantle edged with faint violet, and an irregular row of deep violet-shaded spots 

 running all round upon the faint edging, both being equally distinct upon the upper and 

 under side. The laminated portions of the tentacles dark violet, shading off at the foot- 

 stalk to the colour of the mantle. Branchiae, leaflets, and midribs deep violet at their 

 distal ends, becoming paler below, where they merge into the colour of the mantle. 

 Underside yellowish white, with a bright yellow spot invisible from above. 



Two specimens were obtained under moderate-sized rough stones upon the inner shore 

 of Slut Island, Haitan Straits, on the Chinese coast, near low-water mark, June 30th. 



These animals were very active, moving rapidly along with a gliding motion, at which 

 time their mantles were broad and flowing over the sides, the anterior portion somewhat 

 square. The tentacles were in constant and graceful motion, and they also frequently 

 floated, foot uppermost, on the surface. When at rest, however, the animal assumed a 

 nearly round form. 



Mr. Andrew Garrett* has described and figured a new species (his Goniodoris Tryoni), 

 71 millims. long, from the Society Islands (Mus. Godeffroy, Hamburgh), which suggests 

 likeness to my Chromodoris aiirco-purpurea. His example is mentioned as creamy white, 

 margined with violet, and umber or tawny flesh-coloured branchial plumes and tentacles 

 tipped with violet. The body-spots, however, are deep black ocelli surrounded with 

 white. The branchial plume has 24 divisions, the posterior shorter than those in front, 

 and each terminally divided. Dr. R. Bergh later t refers to Garrett's species under the 

 designation Chromodoris Tryoni, and further describes and gives the anatomy of other 

 specimens collected by Prof. Semper, these differing slightly in tint and markings. The 



* Troc. Acad. Nat. Sci. Philad. 1873, p. 232, pi. iv. 



t In ' Ttoi.scn ira Archip. d. Philipp.' 1 S77, Band ii. Heft 11,1'. MO, and in Journ. d. Mus. Godeffroy, 1S77, Heft 14. 

 pi. iv. figs. 12-23. 



