Narrative of Bahama Expedition. 225 



men is very massive and bush}-, the main stem being over 

 half an inch in diameter and branching profuselv, the whole 

 colony attaining a height of over two feet- The hydrotheca? 

 ure quite small, and the pinna^ much annulated. One of the 

 most delicately beautiful of all the Plumularians is a species 

 allied to Pluni'.daria obllqn.i Sanders, the pinuce of which are 

 very short and bear but a single conical hj'drotheca. There 

 are four nematophores in the axil of each pinna. One of the 

 smallest of the PLUMULARiD.^i is Agiaop/ioiia -pcrftiiiUa All- 

 man, a species resembling a small feather, but only one 

 quarter of an inch high. The corbula. hitherto unknown, 

 resembles that of A. f erf or at a Allman. 



When Dr. S. F. Clarke reported on the hvdroids of the 

 '•Blake," he found a remarkable form characterized bv peculiar 

 processes at the bases of the pinna?, and nematophores of 

 a new type on the main stem of the colonv. This interesting 

 species was made the type of a new genus and called 

 jVematop/ioriis o-randis Clarke. In our collection from Little 

 Cat Island are three species of this same genus, one being 

 the form described by Clarke, and the other two being new. 

 All three agree in having an unusual amount of very dark 

 or black pigment distributed throughout the colony. The 

 peculiar protoplasmic processes described bv Clarke, as issu- 

 ing from the nematophores are shown in our specimens to be 

 the barbed threads of particularly large nematocysts. There 

 are many points of unusual interest yet to be studied in con- 

 nection with this very well-marked genus. Ilalicornaria 

 spcc/osa Allman was also secured here, together with two 

 apparently new species of the same genus which were found 

 growing on JVcmatophonts. A large quantit}^ of gorgonians 

 and millepores came up during our work here, but were 

 mostly of the species secured at Spanish Wells. 



At four p. M. July 19th, the tangles were hauled on board 

 for the last time, and the order given to point the schooner's 

 jib-boom straight for Baltimore. Notwithstanding all the 

 pleasure and advantages for study that had been so thoroughly 

 enjoyed and faithfully embraced, there was no one on board 



