TRIBE I. ASTR^EACEA. 183 



Subhemispherical, polyps large, often laterally coalescing, disks form- 

 ing long sinuous lines. Corallum meandrine, calicles 1 to 1^ 

 inches broad, sometimes of an inch apart, but often coalescing ; 

 exterior striate, not echinate; cells very deep (often 1 inch), some- 

 times 6 inches long ; lamellae unequal, dentate, nearly an inch 

 exsert. , 



Plate 8, fig. 5, section of cell, showing outline of lamellae and cells. 



East Indies. 



This beautiful species is remarkable for the size and depth of its 

 trenches, and the frequent lateral coalescence of adjoining calicles; 

 the intervals, when any exist, are seldom over a line and a half wide, 

 and these usually become less below, or disappear entirely, by a coa- 

 lescence of the sides. The description is taken from a specimen 

 kindly submitted to the author by Dr. Harris, of Cambridge, Mass. ; 

 it was brought from the East Indies by Captain John Codman, of 

 Dorchester. 



III. Aggregatsc, meandrina;. 



12. MUSSA CRISPA. (Lamarck.) Dana. 



M. stipitata, explanato-glamerata, effusa, convexa, discis lineate sinuosis. 

 Corallum margine tenui, crispo et sublobato ; infra, striatum, pli- 

 catum, et parce spinulosum ; supra, gyris sinuosis, prope |" latis 

 (raro 1"), ad marginem dilatatis; collibus " latis ; lamettis crassis, 

 incequalibus, valde serratis. 



Stipitate, explanato-glomerate, spreading, convex; disks linear and 

 sinuous. Corallum with the margin thin, crispate, sublobate ; 

 below, striate, plicate, and sparingly spinulous; above, with sinuous 

 gyri near | of an inch broad (rarely 1 inch), dilating at the border 

 of the corallum ; ridges to of an inch broad ; lamellaB stout, 

 unequal, strongly serrate. 



Plate 8, fig. 6, view of the lamellae. 



Indian Ocean, Lamarck. Singapore, Exp. Exp. 



