DESCRIPTION OF SPECIES 35 



to eight moderately strong longitudinal muscles are present on each side of the thorax. Zooids from 

 different colonies vary a good deal in the development of the branchial sac, which may have from ten 

 to twenty-three rows of stigmata. Each row generally has twelve to fifteen stigmata. The dorsal 

 languets are quite large. In about half of the specimens the zooids have a conspicuous triangular 



3 mm 



Text-fig. 3. Aplidium falklandicum sp.n. : A, colony; B, zooid; C, anterior part of zooid with no thoracic triangles; D, larva 

 (St. WS 793); E, zooid with thoracic triangles; F, G, stomach of zooids showing indistinct markings; H, larva (St. WS 72). 



5-2 



