108 BULLETIN OF THE 



our Delfocyathus, Caryophyllia, the various Pteropods were recognized 

 in the stone, and found al-o in various stages of fossilization. The 

 interstices between the larger forms are generally filled up with Fora- 

 minifera. 



On May 25th the dredge was sent down in 350 fathoms, outside of 

 the locality occupied on the 24th and 29th. It brought up only a few 

 dead corals : Caryophyllia formosa, Deltocyathus Agassizii, Diplohelia 

 profunda, the latter in numerous specimens (see description). Also a 

 fragment of the siliceous skeleton of a sponge, forming a regular net- 

 work somewhat like that of Euplectella as figured by Bowerbank, 

 but lacking the spines. 



The soundings made during this cruise seem to indicate a kind of 

 submarine terrace, on which the dredgings of the 24th and 29th were 

 made. The cast of the 25th was probably made on the edge of it, and 

 the dredge no doubt touched bottom only for a short time, after which 

 the ship drifted off into water too deep for the line attached. 



Remarks and Descriptions of New Species. 



Marphysa floridana Pouet. 



Head small, with ~> antennae ; no tentacles on the buccal ring. Branchiae 

 pectinated, with 5 to 7 loins, small, beginning about the 7th or 9th ring. 

 Tin' composite bristles with a small lancet-shaped appendage. Two eyes, 

 rather large. Superior cirrhi longest, interior short and conical. Teeth of 

 the labrnm large, broad, enamelled, white. Caudal cirrhi two, short. The 

 first ring of the body has only the two superior cirrhi, which are nearly 

 dorsal. 



Body rings about 115. Color reddish, iridescent. Length •'! or •! inches 

 (contracted). Inhabits large deformed paper-like tubes, with lateral open- 

 in-- irregularly placed, though in general alternate, bordered by laciniate 

 ami fimbriate Haps. 



Oil' Sand Key in I no fathoms. 



Marphysa tibiana Pouet. 



All the characters as in the preceding, but the whole animal is more 

 slender, and in some parts of the body the rings are considerably elongated, 

 which may possibly be due to its position in the tube at the time of death. 

 The branchial are almost rudimentary, in tin 1 shape of small club-like 

 appendages to the upper cirrhi. It differs particularly from the former by 

 it- tubes, which are horny, dark In-own. regularly serpentine; at every 



