W. A. HERDMAN. 



Doliolum resistibile, Neumann ; * Lat. 65 S. 



APPENDICULARIID^E Oikopleura yciussica, Lohm. ; Lat. 65 '5 S., Long. 90 E. (Lohmann). 



0. valdivicR, Lolim. ; ditto. 



0. sp. 



Fritillaria borealis, f. ft/pica, Lohm. 



F. antarctica, Lohm. 



According to this list fifty-two species are recorded from the Antarctic area 

 south of 60 S. lat. ; eighty-one species were enumerated by Hartmeyer in " Fauna 

 Arctica" in 1903. 



lu the following systematic statement the species are merely placed in families 

 under the three great divisions of the Tunicata groups of intermediate rank being 

 considered unnecessary in a report of this nature. 



ASCIDIACEA. 



STYELID^E. 



STYELA SPECTABILIS. 

 (Plate I.) 



Locality. Winter Quarters, 17. i. 03, Flagon Point, Dredge, 10-20 fins. One 

 specimen measuring : length 18 cm., dorse-ventral breadth (greatest) 9'5 cm., lateral 

 thickness 7 cm., dorso-ventral breadth at posterior end 6'5 cm. ; across anterior end 

 from branchial to atrial aperture, 8 5 cm. 



External Appearance. Body elongated, upright, somewhat flagon-shaped or 

 swollen in the middle, not compressed laterally, attached by the posterior end 

 (Plate I., fig. 1, and text-figs. 1 and 2). Both apertures are on the anterior end, the 

 branchial turned ventrally and the atrial dorsally ; both are large and distinctly 

 four-lobed (Plate I., figs. 2 and 3). The surface is even and fairly smooth, being 

 merely creased and somewhat corrugated (see text-figs. 1 and 2), but these surface 

 foldings probably disappear when the animal is expanded. The colour (in spirit) is 

 yellowish grey. 



Test thin, but leathery ; somewhat corrugated on the surface and finely wrinkled 

 in places ; white in section and for the most part less than 1 mm. in thickness. 



Mantle thin, but very muscular, closely adhering to test. External layer of 

 circular and internal layer of longitudinal muscle bundles form a close and fairly 

 regular network (see Plate I., fig. 4). 



* Dr. Neumann described (Zool. Anzeiger, 5th Jan., 1909, p. 794) a new Pyrosoma and this new Doliolum 

 from the collection of the German South Polar Expedition. It is only the Doliolum, however, that is really an 

 Antarctic form, found in latitudes 64 and 65 S., as the Pyrosoma (P. ovatum, Neum.) was obtained in the 

 South Atlantic at 30 S. latitude. 



