386 
THE VOYAGE OF tl.M.S. CHALLENGEE. 
specimens were found, and the localities, may be of importance in connection with the 
determination of the times of the year at which Ascidian^ reproduce in different parts of 
the world. 
Table showing Species op Compound Asgidians in which Larva: were found. 
Species. 
Locality. 
Date. 
Botrylloides nigrum, ..... 
Bermuda. 
August. 
Sarcobotrylloides wyvillii, .... 
Faroe Channel. 
Colella pedunculata, . . . . . 
\ 
Kerguelen Island and Strait of 
Magellan. 
January and 
February. 
Colella thomsoni, . ... 
Philippine Islands. 
January 30. 
Colella qaimardi, ..... 
Falkland Islands. 
January 27. 
Colella pulchra, ...... 
Torres Strait. 
September 9. 
Colella concreta, ...... 
Kerguelen Island. 
January. 
Distaplia vallii, ...... 
\ 
(1) Mediterranean, 
(2) Philippine Islands. 
(1) August, 
(2) January 30. 
(.?) pyriformis, .... 
Kerguelen Island. 
January. 
Cystodytes drascMi, ..... 
Off Brazil. 
September 10. 
Polyclinum fungosum-, . ' . 
Port Jackson. 
April. 
Polyclinum molle, ..... 
East coast of Patagonia. 
February 14. 
Aplidium fallax, ... 
Loch Foyle. 
Summer. 
Aplidium despectum, ..... 
Off Kova Scotia. 
May 8. 
Amaroucium pallidulum, .... 
Falkland Islands. 
January 27. 
Amaroucium recumhens, .... 
Strait of Magellan. ■ 
January 11. 
j Amaroucium, colelloides, .... 
South of the Cape of Good Hope. 
December 18. 
1 Psammaplidium exiguum, . . . . 
Off Cape of Good Hope. 
December 17 
Psammaplidium retiforme, .... 
Kerguelen Island. 
January 29. 
Didemnum aurantiacum, .... 
Bass’ Strait. 
April 2. 
Leptoclinum tenue, ..... 
Patagonia. 
January. 
i Leptoclinum alhidum, var. luteolum. 
Morocco. 
August 5. 
Leptoclinum jacicsoni, ..... 
Port Jackson. 
April. 
Ccelocormus Imxleyi, ..... 
East coast of Patagonia. 
February 14. 
Goodsiria placenta, . . . . 
Simon’s Bay. 
December. 
Goodsiria placenta, var. fusca, 
Simon’s Bay. 
December. 
\ Srjnstyela incrustans, . 
Strait of Magellan. 
January 20. 
Buds in various stages of development occurred in a number of species belonging to 
different families. The process of gemmation appears to be usually effected by means of 
vascular appendages or prolongations from the body of the parent Ascidiozooid. This 
process has been long known in the case of the Clavelinidse, and has been more than once 
described in certain Botryllidse (see Sarcobotrylloides luyvillii, p. 59); and I have been 
aide to show that it also occurs in the genus Colella (p. 90). 
In the Polyclinidae the buds are formed from the post-abdomen, which, however, 
seems to be merely the enlarged upper part of a vascular appendage into which the 
reproductive organs have extended. The small knobs found on the end of the post- 
abdomen of some species of PolyclinidaB {e.g., Polyclinum molle, p. 196, and Amaroucium 
glohosum, p. 221) are, I believe, the rudimentary terminations of the modified vascular 
