368 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
by a constricted neck from the right dorsal part of the thorax posterior 
to the atrial aperture, and extending out into the common test, curving 
Text-fig. 7.— Holozod clavata (Sars). Zooid. X 36. 
posteriorly so as to lie along near the abdonien of the zooid to which 
it beloncr,s. It mav contain as many as ten or twelve embryos and 
