HVDKUIDS OF THK U'UOI^ HO1.K KKUtoX. 



Hebella calcarata (A. Ag. ). Fig. 5ii. 



(iMj'u-n mli'iimltt A. \f.. North Anierieun Aealepliie. p. 1!.) 



Tm/ihosome. Colony parasitic, almost always on ,S'.rMA,v/</ oormctno, where il assumes a sym- 

 metrical mode of growth, the' main stem growing straight up the front of the host and giving forth a 

 pair of hydrothecie immediately above each pair of the sertularian hydrothecie. Pedicels very short 

 and slender. Hydrothecie large, curved outward, backward and upward; margin circular, entire. 

 Hydranth with a conical hypostnme am! about 16 tentacles. 



diiiiumiiii'. (ionangia very large, borne on pedicels between the pairs of hydrothecse. Medusc 

 at liirth deeply campanulate, with two long marginal tentacles, and others in course of development; 

 4 radial canals and yellow-spotted proboscis. 



Dixh'iliiitidii. Found attached to '/jmli'm at \Voods Hole by Mr. Walmsley. Vineyard Sound, 

 1 to 8 fathoms (Verrill). 



This species was originally described by McCrady aa a part of the sertularian OH which it grows 



Hebella pygmaea (Alder) MS. Fig. 44. 



(See British Hydroid Zoophytes, p. -J05.) 



Trophotome, Pedicels springing direct from a simple creeping rootstoek, very 

 short, annulated. Hydrothecie minute, cylindrical, deep; aperture smooth, sometimes 

 somewhat oblique, as in figure. 



Ghmotonte. Unknown. 



l>ixli-iliiiti/>ii. Found on a polyxoon off Nant ticket; Sankety Light east by south, 

 24 fathoms; depth, 24 fathoms. (Vinal I'M wards.) 44. iirbel/n pyg- 



This minute species is identified with considerable doubt. m*a (Alder). 



J'- ' ' T 



CAMPANULINIDiE (modilied). 



omi'. Colonies branched or unbranched. Hydrothecre borne on pedicels, tubular, ending 

 in an operculum composed of converging segments. Hydranths with a conical proboscis. 

 tiniiiixdiiu'. Gonangia producing planulsp, or free medns,-e. 

 This family is here modified to include the 

 genera Loreiiellu and Cnlijivlln, the former having 

 heretofore been placed in the Crimpanularid.r. and 

 the latter in the Lafaid.r. Both agree with the 

 genus ('(impinin/iiHi in having hydrothecse with a 

 segmented operculum and hydranths with a conical . 

 proboscis. 



Key to rjenem of I 'niiipiinnliii '>;<' nf ]Vuin! IMe. region. 



A. Colony usually branched. 



a. Hydrotheeffi large, subcylindricnl, with 



a \rell-detined sinuous margin 



at base of segmented operculum iMrctniln- 



a'. Hydrothecie much smaller, ovate in 



outline, the margin passing in 



sensibly into the segments of 



operculum CalijrcUu 



A'. Colony not regularly branchcfl. Hydro- 



theciu not wssile tubuliir. often 



with reduplicated miirgins Oiirmtliirrlla- 



A". Colony not branched. Hydrothec* sessile, 



tubular Cniii<lrlln- 



LOVENELLA. 



Ti-o/ihomme. Colony branched. Hydrothecie 

 deep, with a distinct sinuous margin crowned with 

 operculum composed of several triangular segments 

 which form a pointed covering to hydrotheca. 



f ;<,.,. Gonangia borne on the stems and producing free. Mi-shaped medusjp. with S tenta- 

 cles in two sets, and 4 lithocysts. 



F. C. B. 1899- 



