THE CAMPANULABID^ AND THE BONNEVIELLID^. 97 



Gonosome. — The gonangia are in an aggregated cluster of cylindrical bodies growing from a 

 tangled mass, much as in the case of various species of Lafoea. Individual gonangia attain a 

 length of 6 mm. and a diameter of 1.5 mm. They are rudely annulated throughout, there being 

 7 broad corrugations in the one described. There is a broad neck, almost as broad as the rest 

 of the gonangium, and an abruptly truncated end. The structure is supported on a short 

 pedicel. The gonangial contents have generally discharged or are partially disintegrated so 

 that a satisfactory investigation can hardly be made. 



Distribution.— The type and only known specimen is from station 3480, Bering Sea, lat. 

 52° 06' N.; long. 171° 45', 283 fathoms. 



Type.— C&t. No. 34528, U.S.N.M. 



This remarkable species shows, in its gonosome, a close approach to the Laf oeidse, while 

 the internal anatomy of the hydranth shows its true place to be in the Bonneviellidaj. It also 

 shows a still closer approach to the Anthozoa than does B. grandis. 



? BONNEVIELLA INGENS, new species. 



Plate 27, fig. 4-5. 



Trophosome. — Colony 7 cm. in height, with a fascicled stem which is straight, unbranched, 

 and 3 mm. in diameter. In another specimen the stem is formed of an agglutinated mass of 

 tubes 8 mm. in diameter. Tlie pedicels spring singly and irregularly from this mass of stems, 

 are irregularly annulated, and sometimes attain a length of 16 mm. The annulations are 

 usually rather distant, but deep, resembling irregular segmentations of the unusually thick 

 perisarc. The hydrothecse are very large, being 6 mm. in length and a little more than 3 mm. 

 in diameter, their greatest width being about one-third the distance from the base to the 

 margin. They gradually decrease in diameter to the perfectly even margin and round out 

 basally to meet the pedicel. There is a well-marked diaphragm upon which the hydranth rests 

 and a sharp annular constriction separating the hydranth from the stem. The hydrothecfe are 

 occupied by what appear to be degenerating hydranths, which do not show sufficient differen- 

 tiation of structure to afford a basis for description. The structure consists of a funnel-shaped 

 body, the broad end of which acts as a plug closing the distal end of the hydrotheca, the plug 

 appearing in lateral view as a broad, heavy band just below the margin. The hydranth body 

 narrows below into a comparatively thin stalk and then suddenly expands to form the 

 hydranth base which rests on the diaphragm. 



Gonosome . — Unknown . 



Distribution. — The type and only known specimens of this remarkable campanularian ai'e 

 from Albatross station 4803, Sunushir Island, N. 59° W., 9 miles, 229 fathoms. 



Type.— Cat. No. 34576, U.S.N.M. 



This station, being in the vicinity of the Kurile Islands, is not in American territory; but 

 zoologically these islands appear to be an extension of the Aleutian chain and hence this species 

 may be included, doubtfully, in the American fauna. 



On account of the imperfect condition of the hydranths this species is placed in the Bonne- 

 viellidse with considerable doubt. Longitudinal sections of one of the hydranths were incon- 

 clusive as regards the presence or absence of the preoral cavity and "veloid" of Broch. The 

 tissues were not sufficiently well preserved to yield satisfactory histological results. 



