14 W. T. CALMAN. 



distinct, with well-developed commou eloacal cavities ; buccal 

 orifices small, six-lobed ; common eloacal orifice large, irregu- 

 larly lobed ; zooids with thorax and abdomen united by a 

 narrow neck ; atrial languet very large ; vascular process well 

 developed ; branchial sac rather large, with four rows of long 

 stigmata crossed by narrow intermediate bars ; dorsal languets 

 large, three in number, placed to the left of the middle line ; 

 stomach with internal longitudinal folds. 



Species. — Julinia australis, n. sp., with the characters 

 of the genus. 



Habitat. — Antarctic Ocean. 



EXPLANATION OF PLATES 1—3, 



Illustrating Mr. W. T. Caiman's paper " On Julinia, a New 

 Genus of Compound Ascidians from the Antarctic Ocean." 



Reference Letters. 



atr. I. Atrial languet. b. Bud. i. /. Buccal lobes, b. s. Buccal siphon. 

 b. sph. Buccal sphincter muscle, bl. c. Bladder cells of test. bl. g. Blood- 

 corpuscles, br. s. Branchial sac. c. cl. o. Common eloacal orifice, cl. o. 

 Cloacal orifice, cl. n. Cloacal nerve, d. I. Dorsal lauguet. d. n. Dorsal 

 ganglionic nerve-cord. d. s. Dorsal branchial sinus, d. t. Dorsal tubercle. 

 ect. Ectoderm, end. Endostyle. epc. Rudiment of epicardial system (?) in 

 adult, epc. t. Epicardial tubes in bud. JI. Outer layer of follicular wall of 

 ovary. Ji". Inner layer of follicular wall of ovary, gl. Subneural gland. 

 ht. Heart, inc. p. Incubatory pouch, int. Intestine, int. I. Interserial 

 lamina of branchial sac. int. gl. Intestinal gland, int. d. Duct of intestinal 

 gland. I. m. Longitudinal muscle-bands, n. g. Nerve gland, ces. (Esophagus. 

 ces.f. (Esophagus funnel, ov. Ova. ovy. Ovary, ovd. Oviduct, pbr. Peri- 

 branchial cavity, p. c. Pigment corpuscles, per. Pericardium. /). ph. b. 

 Peripharyngeal band. r.;>. " Raphe posterieur." st. Stomach, i.e. "Test- 

 cells" of ovum. t. c'. Test-cells, tr. Trabecule from branchial sac to 

 mantle, tr. b. Intermediate transverse bars of branchial sac. ts. t. Tubules 

 of testis. V. d. Vas deferens, v. p. Vascular process. 



