THE CAMPANULARID^ AND THE BONNEVIELLID^. 35 



CAMPANULARIA SPIRALIS, new species.' 



Plate 2, fig. 1. 



Trofhosome? — Colonies growing ia dense masses around stems of other hydroids. Pedicels 

 unbranched, springing from a creeping rootstock. Pedicels reaching a length of 11 mm., smooth 

 for the most part, there being a few definite annulations just below the hydranth and often 

 also at the base of the pedicel. Rarely the pedicel is more extensively annulated. The hydro- 

 thecse are very large for this group, averaging about twice the length of C. integra, elongate- 

 campanulate, more than twice as long as wide at the margin which is somewhat flaring and 

 perfectly smooth. The actual measurement of a typical hydrotheca is 1.2 mm. in length. 

 There is a- thickening at the bottom of the hydrotheca as in allied species, but the hydrothecal 

 walls in general are not extensively thickened. Hydranth of the usual campanularian type 

 with a trumpet-shaped proboscis and about 24 tentacles. 



Gonosome. — Gonangia growing almost sessile on the creeping rootstock, excessively elon- 

 gated, attaining a length of 4.5 mm. and being about five and one-half times as long as broad. 

 Its surface is deeply corrugated, the corrugations appearing as an ascending spiral and marked 

 by an ascending spiral plate or flange that forms a conspicuous ornamentation. A long oval 

 spprosac occupies a little more than the lower half of the gonangium, and this is embraced by 

 a set of longitudinal bands which rise above it and break up distally with a number of fine 

 strands attached to the inner surface of the gonangium. 



Type-locality. — Station 4794, Staritschkof Island, Kamchatka, S. 70° W., 5 miles, 58 

 fathoms. 



Type.— Cat. No. 34526, U.S.N.M. Cotype in the Museum of Natural History, State Uni- 

 versity of Iowa. 



This species, although not known to be American, is included in the present work for pur- 

 poses of comparison with allied forms. It is quite probable, moreover, that it will eventually be 

 found in American waters. 



CAMPANULARIA RITTERI Nutting. 



Plate 2, fig. 2. 



Campanularia ritteri Nutting, Hydroids of Harriman Alaska Exped., 1901, p. 171. 



Campanularia ritteri Fraser, West Coast Hydroids, 1911, p. 33. 



Campanularia integra (-part) Kramp, Report on Hydroids collected by the Danish Exped. at Northeast Greenland, 



1911, p. 388. 

 Campanularia ritteri (under name of C. integra) Kramp, Hydroids collected by the Tjalfe Exped. to the West 



Coast of Greenland, 1913, p. 28. 



TropJiosome.^ — Usually consisting of unbranched pedicels growing directly from a creeping 

 rootstock, which is not regularly annulated. Pedicels long and slender, often from two to three 

 times the length of the hydrotheca and with two or three annulations at their proximal end and a 

 spherical annulation at the distal end. Otherwise they are usually without distinct annulation. 

 The hydro thecse are long for this genus, tubular, their sides being nearly parallel and with a round, 

 perfectly smooth rim. Hydranths not present. 



Gonosome.^ — Gonangia large, tubular, about three times as long as wide, coarsely and regu- 

 larly annulated, with the annulation nearly horizontal. Pedicel very short, borne on the root- 

 stock and not annulated. Gonangial contents, numerous developing ova closely packed 

 around the blastostyle. 



Distribution. — This species is known only from the type locality, which is Juneau, Alaska, 

 depth 20 fathoms, and from off the CaUfornian coast, 31 fathoms. This resembles C. spiralis 

 more nearly than any other species known to me, but the hydrothecse and pedicels are smaller 



'By the courtesy of the Hon. Geo. M. Bowers, late U. S. Commissioner of Fisheries, the writer has permission to 

 include in this monograph tJie descriptions of a number of species of Campanularidse which were to be included in a 

 report on the Hydroids collected in the Northwest Pacific by the Albatross iu 1906. 



^ Specimen from station 4794. 



^ Described from type-specimens from Juneau, Alaska. 



* Described from a specimen from Station 2976 off the Californian coast; depth, 31 fathoms. 



