ASCIDIANS OF THE PHILIPPINES — VAN NAME. 99 



No. 148. Station D514G (off Sulade Island, Sulu Archipelago, 24 fathoms, 

 coral sand ana shells, Feb. 16, 190S), (Cat. No. G0U6, U.S.N.M.). 



No. 117. Station D5158 (off Tinakta Island, Sulu Archipelago, 12 fathoms, 

 coarse sand and shells, Feb. 21, 190S), (Cat. No. 6007, U.S.N.M.). 



No. 157. Station D5164 (off Observation Island, Sulu Archipelago, 18 

 fathoms, green mud, Feb. 24, 190S), (Cat. No. 600S, U.S.N.M.). 



No. 123. Station D5640 (off Labuan Blanda Island, Buton Strait, 24 fath- 

 oms, sand and broken shells, Dec. 13, 1909), (Cat. No. 6013, 

 U.S.N.M.). 



No. 160. Tumindao Reef, south end, near Sibutu Island, Sulu Archipelago, 

 Feb. 26, 1908. One small, irregularly shaped and doubtful 

 specimen (Cat. No. 6005, U.S.N.M.). 



The above considerable series of specimens well illustrates the 

 variability in external form and appearance of this species and leaves 

 no doubt in the writer's mind that P. pedata. and Styela whiteleggei 

 Herdman, 1899, must be considered identical. P. pedata was de- 

 scribed by Herdman from a single specimen collected by the Chal- 

 lenger among the Philippine Islands, latitude 6° 55' N.; longitude 

 122° 15' E., 10 to 20 fathoms, sand. Styela whiteleggei was described 

 by the same author (1899) from specimens from Port Jackson, Aus- 

 tralia. The indications are that the species is widely distributed and 

 that other forms described as distinct may eventually have to be 

 united with it. Except for the fact that it has but nine openings in 

 the dorsal tubercle, Herdman's description of P. irregularis, also 

 from the Philippines, latitude 11° 37' N.; longitude 123° 32' E., 18 

 fathoms, mud (see Herdman, 1882, p. 178, pi. 23, figs. 7 and 8), does 

 not seem to differ too greatly from the present species to be regarded 

 as possibly identical, but if this conjecture be correct the name pedata 

 will still have priority. 



The close relationship between P. pedata and P. aurata (Quoy and 

 Gaimard) is very evident from their curved body axis, peculiar 

 dorsal tubercle, pigmented internal tissues, and other characters, but 

 in the former species the gonads do not appear to fuse to form a com- 

 plex network as in the present one. 



PANDOCIA QUADRATA (Herdman), 1881. 



Plate 31, fig. 34. 



1881. Polycarpa quadrata Hebdman, Proc. Koy. Soc. Edinburgh, vol. 11, 



p. 78. 



1882. Polycarpa quadrata Herdman. Rep. Voy, Challenger, vol 6, Tunicate, 



p. 173, pi. 22, figs. 8-10. 

 1885. Polycarpa quadrata Tkaustedt, Vidensk. Meddel. Nat. For. Kjoben- 



h.ivn. ann. 18S4, p. 48. 

 1885. Styela quadrata St/uiter, Natuur. Tijdschr. Neder. Ind., vol. 45, p. 228. 

 1891. Polycarpa quadrata Herdman, Journ. Linn. Soc. London, Zool., vol. 23, 



p. 583. 

 1904. Styela quadrata Seuiter, Sioooa-Exped., vol. 56a, p. 126. 

 1904. Pandocia quadrata Hartmeyer, Bronn's Tier-reich, vol. 3, suppl., p. 



1364. 



