NARRATIVE OF THE CRUISE. 
693 
tion becomes much less. The chief interest of the specimens lies in the fact that no 
Coralliidse have ever been recorded from the Malay Archipelago, and that the only 
localities in the Indo-Pacific area from which species of the family are known are 
Mauritius ( Corallium stylasteroides) and Japan ( Pleurocorallium secundum). Dana’s 
locality of Sandwich Islands for the latter is very uncertain. The fragments (in the 
fossil state) described by Professor Duncan from New Zealand do not appear to throw 
light on the present specimens.’ ” 
The Nudibranckiata. — Dr. Rudolph Bergh of Copenhagen, who has prepared the 
Report 1 on the Nudibranchiate Molluscs collected by the Expedition, has supplied the 
following note : — The so-called Nudibranchiate Gasteropoda are distributed over all 
Pig. 237. — Inferior surface of anterior extremity of Bathydoris abyssorum, Bergh (natural size), showing the mouth, the 
two rhinophoria projecting from their sheaths, the two genital openings (from the anterior of which projects the large 
glans penis), and the anterior margin of the foot. 
seas. Judging by the discoveries made by the Polar Expeditions they appear to be 
least common towards the Poles, while they are most abundant in the tropical and 
subtropical seas, in which latter there occur species of unusual size and most beautiful 
colour. 
I Report on the Nudibrancliiata, by Dr Rudolph Bergh, Zool. Chall. Exp., part xxvi., 1884; 
