214 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



and smooth. The operculum is detachable. There are spines, a 

 scutum and a frontal avicularium. 13 tentacles. 



Genotype. — Cdberea dichotoma Lamouroux, 1816. 



Range. — Oligocene (Vicksburgian) — Recent. 



The specimens of this genus are rather common in the Philippine 

 Islands and seem to belong to several perfectly distinct species. In 

 our material however we have found only detached fragments, often 

 dead. 



CABEREA TRANSVERSA Harmer, 1926 



Plate 38, figs. 9, 10 



1926. Caberea transversa Harmer, Polyzoa "Siboga" Expedition, p. 363, pi. 24, 

 figs 5, 10. 



This species is common in the Malay region where Harmer found 

 it at 13 localities. He writes (p. 3G4), "The strong transverse scuta, 

 more or less expanded at the ends, the large projecting vibracula, 

 forming lateral serrations of the branches, the short ovicells with a 

 large frontal fenestra and the small, single, frontal avicularia are 

 characteristic features." These different features are quite visible 

 on our photographs. 



Occurrence. — D. 5151. Sirun Island, Sulu Archipelago; 5° 24' 40" 

 N.; 120° 27' 15" E.; 24 fathoms; coarse sand. 



Distribution. — Various localities in the Malay region; Singapore, 

 8-16 meters. 



Plesiotype.—C&t. No. 8422, U.S.N.M. 



. CABEREA BREVIGALEATA, new species 



Plate 10, figs. 1-9 



Description. — The zoarium is formed of straight or undulating seg- 

 ments, dichotomous, inarticulated. The zooecia are distinct, united 

 by their mural rim, arranged in 3 or 4 longitudinal rows, rectangular. 

 The mural rim is thin and rounded; the external opesium is very 

 large, elliptical or oval; the internal opesium is small, inferior or sub- 

 median, surmounted by two large septules. The ovicell is very short, 

 little salient, convex, transverse, smooth. The lateral avicularia are 

 very small and inconstant. The frontal avicularia are small, little 

 salient, interopesial, very inconstant in form and in number. The 

 vibracular chamber is very large and covers almost all the dorsal of 

 the zooecia; the groove is prolonged to the median axis and is deep 

 and quite broad at its extremity. The radicular pore is small; the 

 radicells form often a large dorsal cushion. 



Measurements. — 



„ ± , . \ho = 0.25-0.30 mm. „ . \Lz = 0.40-0.45 mm. 



External opesium , _ .„ .„ Zooecium< 7 _ __ 



^ [fo = 0.15mm. [£2 = 0.25 mm. 



Width of segments at bifurcations = 1.00 mm. 



