ASCIDIANS OF THE PHILIPPINES VAN NAME. 135 



Some individuals contained embryos or tailed larvae in the dorsal 

 part of the thorax or proximal part of the abdomen. The repro- 

 ductive organs lie beside the intestinal loop in the posterior part of 

 the abdomen. The testes are rather few in number and form a 

 rounded group from the middle of which the common sperm duct 

 has its origin. The ovary is small and sac-like and lies chiefly 

 anterior to the group of testes. It contained but few eggs in the 

 specimens studied. 



The large colony (No. 142) (Cat No. 5969, U.S.N.M.), above 

 described is from station D5139 (off Jolo Light, Feb. 14, 1908, 20 

 fathoms, coral sand). The smaller one (No. 12) (Cat. No. 5885, 

 U.S.N.M.), from station D5145 (near Jolo Light, Feb. 15, 1908, 23 

 fathoms, coral sand and shells). 



Sluiter (1904) described this species from two specimens dredged 

 in lat. 70° 55.5' S.; long. 114° 26' E., 15 fathoms, coral and stones. 



Genus POLYCITOR Renier, 1804. 



[=^Distoma Authors.] 



The Philippine species belong to the subgenus Eudistoma 

 Caullery, 1909. 



POLYCITOR IANTHINUS Sluiter. 1909. 



Plate 31, fig. 28. 



1909. Polycitor ianthinus Si.t'iter, Siboga-'Exped., vol. 56fr, p. 20. pi. 2, 



fig. 2 ; pi. 8, fig. 3. 

 1909. Eudistoma iantliinum Hartmeyer, Brouu's Tier-reich, vol. 3, suppl., 



p. 1488. 



Colony a thick flattened mass rounded at the edges, and if any 

 general statement can be based on the few specimens in the collec- 

 tion, usually of oval or elongate outline, one end broader than the 

 other, the attachment being by the narrower end. One specimen much 

 narrower than the others may well be described as club shaped, 

 though it is also somewhat flattened in one direction. Test rather 

 opaque, grayish brown and moderately tough. It contains numer- 

 ous large oval cells containing brown pigment; these cells are 

 abundant in the deeper portions of the test as well as in the super- 

 ficial layers and are a very conspicuous feature, giving the colony as 

 a whole, a very dark-brown color. Tissues of the zooids also brown. 

 Surface of colony rather uneven, small pits or depressions indicat- 

 ing the positions of the zooids. Largest colony 65 mm. long, 42 mm. 

 in greatest width, and about 15 mm. thick. 



Zooids rather large, often 5 mm. long even when somewhat con- 

 tracted. Thorax rather small, oblong, the 6-lobed branchial aperture 

 on a very short tube at the anterior end; the atrial aperture also 6- 

 lobed but smaller, situated on a tapering tube nearly or quite as long 



