MUSEUM OF COMPARATIVE ZOOLOGY. 105 



However, short as the season's work was, and few a- wore the casts of 

 the dredge, the highly interesting fact was disclosed, that animal life 

 exists at great depths, in as great a diversity and as great an abundance 

 as in shallow water. 



The identifications of the species have been made by me at the 

 Museum of Comparative Zoology at Cambridge, in the rich collections 

 of which I have found abundant material for comparison ; facilities of 

 every sort were afforded me by Professor Agassiz, for which I wish to 

 express my heartfelt thanks, as also for this opportunity of prompt 

 publication. 



The first dredgings were made on May 17th, on the Florida side of 

 the Gulf Stream, about 5 miles S.S.W. of Sand Key, in depths varying 

 from 90 to 100 fathoms, on a bottom of calcareous mud. The following 

 list comprises the animals obtained : — 



Articulates. A number of small Crustacea were brought up, which 

 have not yet been determined. They belong to the following or allied genera : 

 Dromia, Ilia, Mithrax? (a mutilated specimen), Pagurus, Euphausia, and 

 Orcliestia. 



The tubes of several species of Annelids were obtained, but the animals 

 were in most cases too defective for identification. The largest and best pre- 

 served is Marpliysa floridana, nov. sp. (see description). There are also tubes 

 of one or more species of Serpula. 



The Gephyreans are represented by Sipunculus coraUieola, Pourt. (Troc. 

 Am. Assoc, 1851). 



Molluscs not determined specifically. They are mostly immature speci- 

 mens or fragments of dead shells, and belong to the following genera : Murex 

 (dead), Turbo? (operculum), Leda (living), Astarte (living), TelUna (dead). 

 Of Pteropods dead shells of the following species : Hyalea tridt ntata, Hyalt <i 

 trispinosa, Cuvieria columella, Cleodora lanceolata. The shells of this order 

 are very common in deep-sea soundings. The Bryozoa are represented by 

 Vincula7-ia margaritacea, nov. sp. (see description). 



Radiata. Of Echinoderms were obtained an OpJiiurian (an arm, un- 

 determined) and a number of specimens of Comalula Hagenii, nov. sp. (see 

 description). 



A Zoanthus, rather small, was obtained also, but not having been noticed 

 when alive, it would be somewhat uncertain to determine. 



Hydroids : Antennularia triseriata, nov. sp. ; Thoa pulclicUa, nov. sp. ; Th. 

 capillaris, nov. sp. (see descriptions). 



The Foraminifera had nearly all been washed out of the dredge; onlv the 

 following were noticed: Text'daria conica DO. (very large); Opcrculina 

 14 



