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BULLETIN OF THE BUREAU OF FISHERIES. 



a straight annulated support passing up the one side and the other side forming the segment of a circle; 

 the two unite distally to form a hydrophore for tlie two hydranths that are given off. In each gonangium 

 there are usually two large ova, tlie one above the other. 



Distribution. — Common on the floating sargassum, collected on the seaward side of Bogue Bank. 



There can be little doubt that this species, which is the same tliat Congdon described from Bermuda 

 as new, is the same that Alder obtained on sargassum from the Azores. Figures and description agree 

 perfectly. Since Alder described it, it was found by Jaderholm " in material obtained from the Antilles 

 and by Billard * in the Sargasso Sea, consequently its distribution agrees with several other sargassum 

 forms. 



? Halecium repens Jaderholm. 



Halecmm repens Tiiderhohji, Zool. Anzeiger, bd. xxxn, 1907, p. 373; Northern and Arctic Invert., rv, 1909, p. 54. 



Trophosome. — Colony minute, 2 to 5 mm. high, growing from a stolon that creeps over the surface 

 of other hydroids, without giving off any very regular branches. The whole colony may consist of a 

 single hydrophore growing from the stolon, either simple or reduplicated. In other cases a branch is 

 given off from the pedicel just below the hydrophore and this may be repeated to form a secondary 



Fig. 30- — Halecium repens Jader- 

 holm.  A and B, colonies grow, 

 ing from stolon; C, female 

 gonosome (after Jaderholm). 



Fig. 31. — Halecium tenellttm Hincks. A. portion of colony; 

 B, gonosome (after Hincks). 



branch, but each branch consists of a single hydrophore and its pedicel, single or reduplicated. Near 

 the proximal end of the pedicel there is an annulation that appears like a wrinkle formed by shoving 

 dov\'n the distal end. The perisarc is evidently weak at this point, as many of the colonies are broken 

 off here, leaving a basal stump. Besides this wrinkle, which seems to be always present, there may 

 be other annulations or parts of annulations much less distinct. The hydrophore has a widely flaring 

 rim and the usual circle of dots. 



Gonosome. — Female gonangia pear-shaped, somewhat laterally compressed, with the aperture in 

 the side in a distinct collar. From the base of the collar fiutings radiate to form incomplete rings around 

 the gonangia. Two hydranths pass out through the aperttu-e. 



Distribution. — Found creeping over a colony of Pasythca quadridentata, dredged by the Fish Hauk. 



There were no gonangia on the specimens, and in the genus that is almost necessary to insure identi- 

 fication. The trophosome answers to Jaderholm 's description and figure, though I found no colonies 

 as large as those he reports. Some of the features, notably the wrinkling of the pedicel and the creeping 

 nature, seem to be quite distinctive. 



One hesitates to place a specimen found at Beaufort with one that has been reported from northern 

 Europe only, but since this is such a minute species it might be readily overlooked, and many other 

 species, among them some described in this paper, have as wide and as varied a range. 



I have depended on Jaderholm 's description and figtu-e for the characters of the gonosome and 

 evidently he found only female colonies. 



a Aussereuropean Hydroiden, 1903, p. 267. 



& Exped. Sc. du Travailleur et du Talisman, 1907. p. 



