ASCIDIANS OF THE PHILIPPINES VAN NAME. 1G5 



ened. Variations and irregularities in their width occur in some 

 individuals (perhaps largely because of irregular contraction of the 

 walls of the sac) ; in others they are quite regular. 



Intestinal loop rather long. Stomach with about 10 deep longi- 

 tudinal plications in its wall. Ovary in the anterior part of the 

 post-abdomen. The small pear-shaped testes are arranged along 

 the common sperm duct throughout most of the length of the post- 

 abdomen posterior to the ovary. 



The specimens are all from the vicinity of Jolo and are from shal- 

 low water. 



No. 31. Station D5144 (off Jolo Light, Feb. 15, 1908, 19 fathoms, coral 



sand.) (Cat. No. 5898, U.S.N.M.) 

 No. 23. Station D5145 (near Jol6 Light, Feb. 15, 1908, 23 fathoms, corai 



sand and shells.) Cat. No. 5951, U.S.N.M.) 

 No. 26. Station D5145? (Locally indicated as doubtful.) (Cat. No. 



5950, U.S.N.M.) 

 No. 145. Station D5174 (off Jolo Light, Mar. 5, 1908, 20 fathoms, coarse 



sand). (Cat. No. 5966, U.S.N.M.) 

 No. 45. Jolo, Jolo Island, February 11, 1908 (Cat. No. 5952, U.S.N.M.). 



Sluiter (1909) described this species from a single colony, which, 

 like the Albatross specimens, was also from Jolo, 14 meters. 



AMAROUCIUM MULTIPLICATUM (Sluiter), 1909. 

 Plate 31. fig. 26. 



1909. Aplidium multiplicatum Sluiter, Siboga-Exped., vol. 566, p. 101, pi. 5, 



fig. 3. 

 1909. Aplidium multiplicatum Hartmeier, Bronn's Tier-reich, vol. 3, suppl., 



p. 1469. 



Small colonies usually roundel or more or less flattened, and 

 sessile by a broad base; larger ones may be lob?d or elongate and 

 attached near one end. Largest colony 73 mm. long by 26 mm. in 

 greatest width. Surface of colony smooth and shiny, the test more 

 or less transparent so as to allow the zooids to show through in the 

 best preserved specimens, but in those in poorer condition the sur- 

 face may be furrowed and the test more or less opaque. Color light 

 brown or yellowish brown, varying to yellowish white. Zooids 

 arranged in more or less complex systems ; common cloacal apertures 

 rather few. Well expanded zooils may measure 7 mm. to 8 mm. 

 long when the post-abdomen is well developed, but in the usual con- 

 tracted state found in preserved material they are often only half 

 the above length. 



Branchial aperture 6-lobed; atrial aperture varying from dis- 

 tinctly lobed to nearly plain. An atrial languet of simple form 

 arises slightly in front of the atrial aperture. 



