GEOGRAPHICAL DISTRIBUTION, SYSTEMATIC. Tim. 5 
maxima , Pegea confcederata, Thalia democratica , Pyrosoma elegans , 
Doliolum mulleri , and Z). ehrenbergi. 
Hceckel (5) discusses briefly the pelagic Tunicata which enter into the 
formation of “ Plankton.” 
SYSTEMATIC. 
Lahille (8) elaborates in detail, with full descriptions of most of 
the groups, the system of classification which he had announced in 
previous papers (see this Record for 1887, Tun. 3). His scheme is as 
follows : — - 
Classes. Orders. 
Atremata - Archipneusta 
Hemitremata Syringobranchiata 
Suborders. 
J KowalevsJciadce - 
1 Appendicular iadce 
Didemniadce - - 
AplousobranchiataX 
\Polycliniadce - - £ 
f Cioniadcc - - - 
Eutremata 
Phlebobranchiata 
' Stolidobranchiata 
^ Ascidiadce - 
Cynthiadce- - - 
Molguliadce - - 
Families. 
KowalevsJcidce. 
Appendicularidce. 
Salpidce. 
Octacnemidcc. 
Doliolidce. 
Pyrosomidce. 
Didemnidce. 
Distomida). 
Polyclinidce. 
Aplididce. 
Cionidce. 
A scidiidce. 
Corellidce. 
Corynascididce. 
Botryllidce. 
Styelidce. 
Cynthiidce. 
Eugyridce. 
Molgulidce. 
He discusses the classificatory position of most of the French Tunicata, 
and the anatomical and specific characters of some of the groups, espe- 
cially of the Compound Ascidians. He does not deal in detail with the 
Appendicularidce , the Cynthiidce, and the Molgulidce, and some of the 
smaller groups. 
ASCIDIACEA. 
ASCIDIiE SIMPLICES. 
Fam. Cynthiidce. 
Cynthia jacatrensis, n. sp., Sluiter, (13) p 331. 
Styela perforata , n. sp., id. t. c. p. 334. 
Styela traustedti, n. sp., id. t. c. p. 336. 
