. Bulletin - United States National Museum. Science. ASCIDIANS OF THE PHILIPPINES VAN NAME. 139 regular grains of calcareous matter, broken spicules, etc., among the spicules of the capsules and in the basal parts of most of the colonies. Size of largest colony 70 by 38 mm. across and about 4 mm. thick. The constricted part of the body connecting the thorax and abdo- men of the zooid is very short, and when contracted the thorax is drawn down so that it lies partly beside the abdomen and is received within the calcareous capsule; the entire zooid then does not occupy a length of much over 1 mm
. Bulletin - United States National Museum. Science. ASCIDIANS OF THE PHILIPPINES VAN NAME. 139 regular grains of calcareous matter, broken spicules, etc., among the spicules of the capsules and in the basal parts of most of the colonies. Size of largest colony 70 by 38 mm. across and about 4 mm. thick. The constricted part of the body connecting the thorax and abdo- men of the zooid is very short, and when contracted the thorax is drawn down so that it lies partly beside the abdomen and is received within the calcareous capsule; the entire zooid then does not occupy a length of much over 1 mm. There are strong longitudinal muscles in the mantle to bring about this contraction; on the sides of the thorax they form a number of separate bands, but at the posterior end of the thorax they converge to a single broad band on each side and this spreads out again to a thin sheet on the side of the abdomen. Apertures on tubes (that for the atrial aperture the longer), both with six lobes. Tentacles rather numerous, apparently of three orders. Their ar- rangement is difficult to determine in the specimens. Dorsal languets not demonstrated. Stigmata only moderately numer- ous. Four rows have been repre- sented in figure 92 as the most prob- able number, but the contracted state of the sac prevented counting them. There are about a dozen male glands; they are oblong or cuneate figs. 91, 92.—ctstodites philippin- bodies placed radially in a circle, ENSIS ^ER°MAN- 9i'R spICDLES- 1 J ' X 20. 92, Zooid. X 25. the common sperm duct proceeding from the center of the group. The ovaries were not made out in the specimens studied, but some of the zooids have large eggs or embryos beneath the mantle. This appears to be a common and widely distributed species in shallow water, as it is represented by the following specimens. No. 87. Station D510S (off Corregidor Light, Jan. 15, 1908, 13 fathoms, coral). Several colonies (Cat. No. 5924, ). No. 40. Station D5141 (off Jolo Light,
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