BATHYMETRICAL DISTRIBUTION. 
In this section, as in the preceding one, the Challenger results will be treated in the 
same manner as that which was adopted in 'the First Part of this Eeport, in order that the 
conclusions arrived at in the case of the Compound Ascidians may be readdy combined 
or compared with those given for the Simple Ascidians.^ 
The first table given below shows the range in depth of the species, genera, and 
families of Compound Ascidians. The names are arranged systematically, and only the 
extreme limits of depth at which each species has been found are given. 
In the case of a few of the species the depths at which they were obtained is not 
known. 
Family, Genus, and Species. 
Range in Depth. 
. BoTRYLLIDiE 
Botrylloides tyreum, ..... 
18 fathoms. 
perspicuum, .... 
10 „ 
var. rubicundum. 
10 „ 
nigrum, ..... 
Shallow water. 
fulgiirale, ..... 
530 fathoms. 
Sarcobotrylloides vjyvillii, . . . 
363 
Polycyclus lamarcTci, ..... 
363 
jeffreysi, 
35 „ 
Distomid.® — 
Colella pedunculata, ..... 
10-75 
thomsoni, ...... 
10 „ 
gaimardi, ..... 
5-10 
pulchra, ...... 
6 „ 
elongata, ...... 
30 „ 
quoyi, 
25 „ 
murrayi, ...... 
120 „ 
var. ruhida, .... 
38 
ramulosa, ...... 
245 
concreta, ...... 
. 10-60 
Distaplia vallii, ...... 
10-35 
1 See Part I. of this Report (vol. vi., 1882), p. 267. 
