224 Natural History Bulletin. 



not inserted on the front of the stem. The other Scrtiilaria 

 is a beautifully ornamented form, the Indrotheca^ being long 

 and tubular, \vith close-set thin, but highly elevated ridges 

 giving a closely annulated appearance to the unusually large 

 h3-drotheca^ Thuiaria distans Allman, in which each inter- 

 node of the stem supports three shallow and distant h\dro- 

 thecic, and another, probably new, species of the same genus, 

 in which two pairs of hydrotheca? are borne on each inter- 

 node of the stem, were also included. Two species of the 

 genus Dcsmoscyphus were found, neither of which can be 

 placed in any species described in the somewhat full literature 

 at my disposal. I was greatly interested in finding, while 

 working over this collection a species which was described 

 in 1786 b}' Ellis, one of the very earliest writers on the 

 h3-droids, under the name Scrtiilaria qiiadn'dcnfata, from the 

 island of Ascension off the African coast. The species is 

 figured in his "Natural Historv of many Curious and Uncom- 

 mon Zooph3'tes Collected From Various Parts of the World.'" 

 In 1821 Lamovn"oux. in his "'Exposition Methodique," des- 

 cribes the same form under the name Pasytlica qiuidridcntata^ 

 From that time on. this curious genus seems to have been 

 lost sight of up to the time when we found our specimens 

 near LitLle Cat Island. This interesting species is peculiar in 

 having the calicles in groups of four, the lower pair being 

 larger and somewhat different in shape from the upper. 



No less than twelve species of Plumularid.'E are included in 

 the collection made here, and two-thirds of them are probably 

 undescribed. The genus Pliin/iilnria is represented by twO' 

 closely related species, both apparently new. Ilaloficris 

 carinata Allman is a very pretty species which has the cup- 

 shaped hydrotheca surmounted by a pair of fixed lateral 

 nematophores borne on long processes from the stem. The 

 name '-carinata" was suggested bv the keel that runs down 

 the anterior face of the hvdrotheca". The bulkiest hydroid 

 secured during the whole cruise was a species which is in 

 some respects allied to Ilippiirclla : but does not show the 

 peculiar reproductive contrivances of that genus. The speci- 



