350 INVERTEBRATA OF MASSACHUSETTS. 



often two inches in diameter, when expanded. Its color varies 

 from light fawn to dark chestnut. The tentacula have alternate 

 rings of the same color and of white, so that they are white tipped 

 or not, according to their stage of growth. It may be nothing 

 more than A. mesembryanthemum of European authors. 



TUBULA V RIA INDIVI V SA, LIN. ELLIS; Coratt. tab. 16, f. C. LISTER; 

 Philos. Trans., 1834, 366, pi. 8, f. 1 . JOHNSTON ; Brit. Zooph., 113, pi. 3, f. 1, 2. 



A beautiful object, found abundantly around Boston, on the 

 under side of floating timber. It grows in clusters, each animal 

 having a circle of minute filaments, enclosing a group of shorter, 

 pink-colored ones, which, being seated upon a straw-colored 

 stalk three or four inches long, resembles a delicate flower with 

 its petals and stamens. 



TUBULAVRIA LARYNX, SOLANDER; ELLIS; Corall., pi. 16, f. b. JOHN- 

 STON ; Brit. Zooph., 115, pi. 3, f, 3; pi. 4, f. 3-5. 



Similar to the preceding, but smaller. They are principally 

 distinguished by their tubes being somewhat branched, and wrin- 

 kled so as to form three or four rings at regular intervals. 



TUBULA X RIA RAMO V SA, LIN. ELLIS; Brit. Zooph., tab. 16, f. a, and 

 tab. 17, f. a, A. 



Branched like the preceding, and with rings at the origin of the 

 branches ; but the polypi have only a single series of tentacula. 



TUBULA'RIA STELLl'FERA, COUTHOUY; Bost. Journ. Nat. Hist., ii. 56. 



A beautiful, salmon-colored, minute species, growing in clus- 

 ters on logs around the bathing-house at Craigie's bridge. These 

 clusters look as though they might be patches of moss. I have 

 not been able to refer it to any described species. 



SERTULA N RIA PINNA'TA, PALLAS; JOHNSTON ; Brit. Zooph., 127, pi. 9, 

 f, 5, 6. 



Grows on old shells, and resembles a miniature, thinly-branched 

 cypress. 



LAOMEDE'A GELATINO V SA, JOHNSTON; Brit. Zooph., 152, pi. 21, f. 3, 

 4 ; pi. 23, f. 1. Campanularia gelatinosa, FLEM., 549. 



Found attached to Tubuldria larynx. The polypi are very 



