Polycarpa

# 4619, juvenile. # 4650, 3.4 cm in length, 2.2 cm in width, attached to rubble. Tunic completely white; thin red line around edge of both siphons. Atrial siphon in anterior third of body; siphons aim away from each other. Dense longitudinal and circular muscles extend to posterior end of body. Oral tentacles very densely crowded, numerous, as described by Kott (1985). Dorsal tubercle slightly inrolled. Missing branchial sac, gut and intestine. Endocarps over entire body wall, 18 gonads on the left, 22 on the right, loosely attached along their side; red line down the middle of each. In mature gonads the colorless sperm ducts join to a central one with a single opening by the oviducal opening. According to Kott (1985), young P. papillata often do not have red on the tunic.