4 Tun. 
TUNICATA. 
Salpa from Pyrosoma. He would trace the metagenesis of Salpa and 
Pyrosoma to precocious budding of the larval Synascidian. 
Hartmann (5) describes the structure of the tailed larva of Ascidia 
patellceformis , in which he says there may be two eye-spots, as well as 
the otolith. 
There are a number of short papers by Pizon (15-19) and by Giard 
(l)on budding and embryonic blastogenesis. and the formation of the 
colony in Compound Ascidians. Giard points out, in answer to Pizon’s 
criticisms, that the development of eggs, embryos, and larvae varies con- 
siderably under different conditions in Synascidians, and also in some 
other animals. For these phenomena he proposes the term “ poecilogony.” 
Korotneff (10) describes the development of the buds in his new 
genus Dolchinia. 
GEOGRAPHICAL DISTRIBUTION. 
Garstang (3) has commenced a record of the Tunicata found in the 
neighbourhood of Plymouth, and also records a few species from the Isle 
of Wight. 
Herdman (6) records some Tunicata from the West Coast of Ireland, 
including two new species — Molgula holtiana , from Killybegs, and Poly - 
carpa argoensis , from Killary Lough. 
Korotneff (10) describes a new form, Dolchinia mirabilis , from the 
Mediterranean. 
For a record of the geographical distribution of the known species of 
Tunicata , see Herdman (8). 
SYSTEMATIC. 
Herdman (8) gives a revised classification of the Tunicata , with 
definitions of the groups down to genera, and analytical keys to the 
species in each genus. The chief divisions are the same as in the Chal- 
lenger Report, but some changes and additions have been made in the 
subdivisions. An indication of the geographical distribution of each 
species is given, and imperfectly characterized species of doubtful posi- 
tion are put in separate lists under the genera. There are about 104 
genera and about 830 species. Several new generic groups are instituted, 
and some new species briefly defined. 
Garstang (3) separates the genus Perophora and its allies from the 
Clavelinidcc , and puts them in a distinct family, the Perophoridce. 
ASCIDIACEA. 
MoLUULIDiE. 
Molgula holtiana , n. sp., Herdman (6). p 200. 
