162 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Sluiter (1909) described this species from a single small colony 

 from the Sulu Archipelago (latitude 6° 7.5' N.; longitude 120° 26' 

 E., 16-23 meters). He describes the colony as basin shaped, pro- 

 duced below into a short pedicel. The latter is not present in the Al- 

 batross specimens, but the colonies are basin or saucer shaped and at- 

 tached only by a very small area of the lower surface. A colony of 

 this form is very unusual in this genus or family. 



Family SYNOICIDAE Hartmeyer, 1908. 



[=POLYCLINIDAE Authors.] 



Genus POLYCLINUM Savigny, 1816. 



POLYCLINUM FESTUM Hartmeyer, 1905. 



1905. Polyclinum festum Hartmeyer, Zool. Jahrbiicher, Syst., suppl. vol. 



8, p. 401, pi. 13, figs. 6 and 7. 

 1909. Polyclinum festum Hartmeyer, Bronn's Tier-reich, vol. 3, suppl., 

 p. 1461. 



Owing to mutilation and distortion, the specimens give little 

 indication of the original form and mode of attachment of the 

 colonies. The largest and best of them is an elongated flattened 

 mass about 60 mm. long and nowhere much over 5 mm. thick. 

 The area of attachment seems to have been small and much of the 

 lower surface as well as the upper to have been free. 



Test tough, brownish from diffused color; the tissues of the zooids 

 are still browner though no distinct pigment cells were observed. 

 Zooids apparently arranged in systems, but the form and limit of 

 these are difficult to make out on account of the condition of the 

 specimens. 



Zooids large, when straightened out and not much contracted 

 some measure 6 to 7 mm. long or even more. Thorax long and 

 rather narrow, broad at the anterior end. Branchial aperture with 

 six slightly bifid lobes; atrial aperture a plain round orifice, gen- 

 erally directed forward; between it and the base of the short bran- 

 chial tube a long atrial languet arises. A narrow, constricted neck 

 of varying length connects the thorax and abdomen, which is broad 

 and of moderate length. A still narrower neck connects the ab- 

 domen with the small oval post-abdomen. 



Mantle musculature slight. Slender, rather irregular longitudi- 

 nal muscles are present on the thorax, some of them extending out 

 on the atrial languet. 



The tentacles appear to be of more than one size. They were 

 not counted, but do not seem to be very numerous. 



Dorsal languets, though probably present, were not demonstrated. 



Branchial sac long and narrow, with at least 16 or 17 rows of 

 stigmata in adult zooids, but the number in a row does not appear 



