MUSEUM OF COMPARATIVE ZOOLOGY. 57 



been taken from a series of drawings which Professor Agassiz caused to be 

 made from living specimens, in 1852. 



Halcampa albida Agassiz, MS. 



Syx. Corynaclis albida Agassiz, Proc. Bost. Soc. Nat. Hist. VII. p. 



24, 1850. 



Column, in full expansion, long and slender, but very changeable in 

 form ; upper half covered with prominent suckers, arranged rather closely 

 in longitudinal rows. Tentacles twenty, slender, with a round* d knob 

 at the end. Length in expansion, about 3 inches; thickness..!. Color 

 light brownish yellow; tentacles lighter, with the ends dark brown. — 

 Nantucket, Massachusetts, buried in sand; B. T. Morrison. 



Dysactis pallida Verrill. 



Syx. Actinia pallida Agassiz, MS. 1849 ; 1 Anthea flavidula McCrady, 

 Proc. Elliott Soc. of Charleston, S. C, I. p. 280 (without description). 



Column short, subcylindrical, expanding above the middle to the margin 

 of the broad disk, but varying somewhat in form according to the state of 

 contraction. Inner tentacles an inch or more long, slender, those near the 

 margin short, conical, with some of intermediate length between. Column 

 sometimes 1.25 inches high ; disk .75 broad. Color light yellowish brown; 

 longest tentacles lighter, spotted with white. — Charleston, South Carolina; 

 L. Agassiz. 



Bunodes cavernata Verrill. 



Syx. Actinia cavernata Bosc, Hist. nat. des Vers, 1802 (the young). 

 — Charleston, South Carolina : L. Agassiz. 



Tthodactinia Davisii Agassiz, Comptcs-Renuus, XXV. p. 677. 1847 ; Revue 

 zoologiqiie Soc. Cuv. p. .'594. 1847. 



Syx. Actinia obtruncata Stimpsox, Marine Tnvertebrata of Grand Mr- 

 nan, p. 7, 1853 (littoral variety). — Massachusetts Bay; L. Agassiz. — 

 Eastport, Maine; A. E. Verrill. 



The genus Tthodactinia, established by Professor Agassiz in 1847, is per- 

 fectly equivalent to Tealia recently proposed by Gosse, the type of the 

 former, II. Davisii, being the American representative of li. crassicornis of 

 Europe, to which it is very closely allied. 



Aulactinia Agassiz, MS. 



Column elongated, upper portion capable of involution. "Walls with 

 prominent verruca? in longitudinal rows on the upper portion ; the marginal 

 ones larger, trilobed, the lobes again subdivided on the lower side. Tenta- 

 cles short, subequal. 



Aulactinia capitata Ao., MS. 1849. 



Column much elongated ; basal disk somewhat expanded. Suckers 

 8 



