258 PKOr. ALLMAN ON NEW GENEEA 



loses itself on the base of the hydrauth, and in the specimen is 

 irregularly corrugated and separated along the stem by a con- 

 siderable interval from the ectoderm, this interval becoming stOl 

 wider at the base of the stem ; the separation of the pellicle 

 from the ectoderm, however, may be due to the action of the 

 alcohol in which the specimen is preserved. 



The filaments, which are emitted from the stem, commence at 

 some distance above the base ; they are simple and capillary, and 

 are each surrounded by a delicate extension of the investing 

 pellicle of the stem. 



The proximal tentacles, which are of moderate length, taper to- 

 wards their extremity, where they end in a blunt, slightly enlarged 

 extremity, showing an apparent tendency to a capitate termination. 

 The distal tentacles, which are very short and very numerous, 

 cover a narrow zone just below the mouth. 



The clusters of gonophores lie, in the specimen, entirely at the 

 distal side of the longer tentacles ; and it does not seem that in 

 the living state of the Hydroid they could have formed pendulous 

 groups hanging below the tentacular verticil. 'No evidence of 

 the sex of the specimen could be obtained. 



The specimens are adhering by their base to fragments of shell, 

 and seem to have been dredged from a bottom of shelly sand. 

 They were collected by Mr. Holboll, mentioned in a note from 

 Prof. Liitken as " the lamented Governor of South Greenland, a 

 zealous and able collector." 



HYDSOIDA CALYPTOBLASTEA. 

 CAMPANULABIID^. 



Campanflaeia. 



Campanularia crenata. Plate XI. figs. 1, 2. 



Troplwsome. Hydrophyton a creeping adherent filament, which 

 sends ofi" from distance to distance short free hydrotheca-bearing 

 branches ; adherent portion smooth, hydrothecal branches very 

 distinctly ringed, slightly thinner than the adherent portion. 

 Hydrothecse deep and narrow, about -^ of an inch in height, 

 somewhat tumid at the base, slightly contracting upwards, and 

 then gradually expanding at the orifice, so as to form an everted 

 lip ; margin of orifice crenate, with eight broad shallow lobes. 



