ASCIDIANS OF THE PHILIPPINES — VAN NAME. 137 



Sluiter (1909) describes the species to which these specimens ap- 

 pear to belong from reefs at Nusa Laut and Banda. He describes 

 his specimens as a dark brownish violet, a variation in color from 

 the Philippine specimens, though not too great to render the identifi- 

 cation improbable. 



POLYCITOR TOROSUS Sluiter, 1909. 



Plate 32, fig. 41. 



1909. Polycitor torosus Sluiter, Siboga-Exped., vol. 56&, p. 18, pi. 1, fig. 



19 ; pi. 6, fig. 3. 

 1909. Eudistoma torosum Haetmeyek, Bronn's Tier-reich, vol. 3, suppl., p. 



1488. 



The few specimens in the collection indicate 

 a tendency of the colony to assume a capitate 

 form, the upper surface being somewhat flat- 

 tened and the sides nearly vertical, though con- 

 verging a little toward the base, which is not 

 very much less in diameter than the upper part. 

 The largest specimen is evidently not an entire 

 colony; its greatest diameter is about 38 mm.; 

 its height appears to have been less than this. 



Test gelatinous, yellowish with a tinge of 

 olive, semitransparent with a smooth shining 

 surface on the upper part of the colony, though 

 this may be slightly depressed and darker colored 

 over the position of each zooid. The lower part 

 of the sides of the colony may be somewhat fig. 90. — polycitor 

 wrinkled transversely, and discolored or rough- tokosus slditeu. 



Zooid. X 25. 



ened with some adherent mud or sand. 



Zooids rather small, often only 2 mm. or less in length in the vio- 

 lently contracted and distorted state in which they occur in preser- 

 vation, the long constricted pedicel or neck connecting the thorax 

 and abdomen being so shortened that the abdomen comes against 

 the thorax. When even moderately extended they are, however, two 

 or three times the above length. 



Branchial and atrial apertures on fairly prominent forwardly 

 directed tubes, both 6-lobed. One or more vascular processes arise 

 from the posterior end of the body. 



Mantle with numerous strong longitudinal bands on the thorax. 

 These muscles continue back on the abdomen, but become more 

 diffuse and less conspicuous. 



Tentacles not very numerous, apparently of three sizes, the smallest 

 inserted somewhat nearer the aperture than the rest. 



Dorsal languets not demonstrated. 



