Smith and Harger — St. George's Banks Dredging s. 53 



Lafoea gracillima G- 0. Sars (Alder sp.). 



Lafoea fruticosa Hincks, History of British Hydroid Zoophytes, p. 202, pi. 41, fig. 2, 



1868; and Annals and Magazine Nat. Hist, IV, vol. xiii, pp. 132, 148, pi. G, figs. 



6-10, pi. 7, fig. 16. 1874. 

 Lafoea gracillima G. 0. Sars (Alder sp.), Bidrag til Kundskaben om Norges Hydroi- 



der, in Vidensk.-Selskabs Forhandlinger, Christiania, for 1873, p. 115 (27), pi. 4, 



figs. 19-21. 



Hincks reports this species from 100 fathoms off the coast of 

 Iceland, and G. O. Sars from a depth of 150 fathoms off the Norwegian 

 coast. It has been dredged by Professor Verrill in the Bay of Fundy 

 and in Casco Bay. 



Halecium robnstum Verrill. 



American Journal of Science, III, vol. v, 1873, p. 9, December, 1872. 



Stem stout and coarse, composed of many tubes ; branches stout, 

 tapering, compound except at tips, pinnately or bipinnately branched, 

 the branchlets spreading at an angle of aboiit 45° ; yellowish white 

 and translucent, about '5 of an inch long, divided by simple distant 

 constrictions, the long internodes usually bearing from two to four 

 hydroids. Hydrothecoe alternate, large, deep, somewhat vase-shaped, 

 with an even, slightly evei'ted rim, below which there is a slight con- 

 striction ; the middle region is slightly smaller, gradually narrowed 

 toward the base, with a simple diaphragm near the base within. 

 The hydrothecJB are articulated upon slightly prominent projections 

 from the stem, in an oblique and excentric position, so as to produce 

 a decidedly geniculated appearance. Most of the hydrothecse are 

 sim^jle, but some have one or two slightly pi'ominent secondary rims 

 near the margin. Height about 100'"™. 



East of St. George's Bank, 430 fathoms (haul g). 



Sertularella polyzonias Gray, var. gigantea Hincks. 



Annals and Magazine Nat. Hist, IV, vol. xiii, p. 151, pi. 7, figs. 11, 12, 1874. 



Diphasia mirabilis Verriii. 



American Journal of Science, III, vol. v, 1873, p. 9, December, 1872. 



Stem stout, rather rigid, narrowed at base, pinnately branched, 

 somewhat flexuous between the branches, which are alternate, stout, 

 rigid, straight, constricted at base, spreading at an angle of about 

 45°. Hydrothecae on the main stem in two rows, nearly opposite ; 

 on the branches mostly in six regular rows, occupying all sides of the 

 branches, those in the adjacent rows alternating. The hydrothecae 

 have large, appressed, somewhat swollen bases, but the upper portion 

 is rapidly narrowed, prominent and curved outward; aperture 

 strongly bilabiate, operculated. Reproductive capsules not observed. 



Le Have Bank, 60 fathoms (haul e). 



