PACIFIC TUNICATA OF U.S. NATIONAL MUSEUM 205 



network of liydroid stolons {Sertularia sp.). Branchial and atrial 

 apertures open respectively at tip of short siphons situated approxi- 

 mately at level of each one-third of body length. Surface of body test 

 yellowish white, with three deep longitudinal plications on each side. 

 Test leathery and tough, rather thick along folds but only 1 mm. at 

 tliinner places between folds; inner surface whitish. INIantle thin and 

 yellowish brown. Only longitudinal muscles converging at apertures 

 prominent, although some circular muscles are found in neigliborliood 

 of bases of siphons. 



Six folds on each side of branchial sac. Inner longitudinal vessels 

 arranged (D = dorsal, V = ventral) : 

 Right D 2 (13) 1 (17) 2 (18) 2 (17) 2 (14) 3 (12) 5 V 



Transverse vessels arranged :143424341 (numerals indicate order 

 of thickness). Some parastigmatic vessels may be found here and 

 there. Stigmata 9-12 in each mesh. Tentacles 37, arranged partly 

 in the order: thick thin medium thin thick, branches very numerous 

 and found in four orders. Ciliated groove describes a very compli- 

 cated configuration. Intestinal loop veiy elongated. Liver very 

 spacious. Approximately 20 endocarps along dorsal margin and 4 

 along ventral margin of distal branch of intestinal loop. Anus bilobed, 

 each lip plainly margined. Genital capsules 12 on right, 13 on left 

 side in intestinal loop. 



Remarks. — This is evidently a typical sea tulip or sea apple, a char- 

 acteristic ascidian of tlie Australian-New Zealand waters. 



107. Herdmania mirabilis (von Drasche) 



Cynthia mirabilis vou Drasche, 1SS4, p. 377, pi. G, figs. 2-7. 

 Halocynthia mirabilis Oka, 190Ga, p. 39. 



Pyura mirabilis Van Name, 1945, p. 340, fig. 224.— Tokioka, 1954b, p. 93, pi. 7, fig. 

 26; pi. 8, figs. 27-33.— Tokioka, 1959a, p. 232.— Tokioka, 19(55, p. 120. 



MATERIAL EXAMINED 

 Japan: Hokkaido Island; Otaru. E. S. Morse, coll. One specimen (USXM 

 11G87). 



Description. — A single 45 mm. specimen from Japan, presented by 

 the Tokyo Imperial University, was examined. Strongly contracted, 

 test surface conspicuously wrinkled. Seven folds on each side of 

 branchial sac, the seventh much smaller than the six other dorsal ones. 



108. Herdmania montus (Savigny) 



For references concerning the typical form of this species, see Van Name, 1945, 

 p. 341 ; for references to the typical and other forms, see Tokioka, 1953a, p. 277. 



MATERIAL EXAlMINED 



Japan: Honshu Island; off Manazuru Zaki N. 8° W., 4.5 nil.; Albatross sta. 

 3(;9S. .33 specimens (USNM 11780).— Kyushu Island; Kagoshima. E. S. IMorse, 

 coll. Two specimens (USNM 11699).— Kyushu Island; Moji. E.S. Morse, coll. 

 Three specimens (USNM 11702). 



