112 



REPORTS ON INV£;STIGATI0NS AND PROJECTS. 



Jefferson. The ooze at the bottom of the moat and the algae and other plants of low 

 order which thickly cover the wall below the water line are the habitats of many inter- 

 esting species, Rhizopods and Flagellates being especially abundant. 



Surface tows were frequently made in the vicinity of Loggerhead Key by means of 

 which many pelagic forms such as Noctiluca and various species of Radiolaria were 

 obtained in great numbers. Experience taught me, however, that these forms must be 

 placed under the microscope as quickly as possible after being taken from the surface of 

 the sea if one desires to study them in the active condition. 



Naturally, in the latitude of the Tortugas, Foraminifera are perhaps more abundant 

 than any other group of protozoa. The beach rocks of Loggerhead Key which are 

 exposed at low tide are covered in many places by algae, inclosed in the matted growth 

 of which may be found myriads of beautifully sculptured, shell-bearing Foraminifera, 

 including many species. The gulf-weed which floats at the surface of the sea carried 

 with it a number of species, while not a few stalk-bearing forms were found attached 

 to Sertularian hydroids which were borne by the gulf-weed. By means of the dredge 

 with which the Physalia is fitted, some species, mostly Foraminifera, were obtained 

 from a muddy bottom at a depth of about 20 fathoms, which were not found elsewhere. 



In the five weeks' work over 90 species were studied and identified, besides several 

 forms which are apparently undescribed and may represent new species. The species 

 identified at the Tortugas are included in the following genera : 



Acanthometra. 



Acineta. 



Actinophrys. 



Amphidinium. 



Amphisa. 



Anisonema. 



Articulina. 



Aspidisca. 



Astasia. 



Bolivina. 



Bulimina. 



Ceratium. 



Chilodon. 



Coleps. 



Collozoum. 



Cond3dostoma. 



Cothurnia. 



Cornuspira. 



Cympalophora. 



Diophrys. 



Discorbina. 



Dysteria. 



Euplotes. 



Exuvisella. 



Frontonia. 



Glenodinium. 



Globigerina. 



Gromia. 



Gymnodinium. 



Haplophragmium. 



Kerona. 



Lacrymaria. 



Lagena. 



Lembus. 



Lichnophora. 



Lionotus. 



Loxodes. 



Loxophyllum. 



Mesodinium. 



Miliola. 



Nassula. 



Noctiluca. 



Nonionina. 



Orbiculina. 



Orbitolites. 



Orbulina. 



Oxytricha. 



Pntellina. 



Peneroplis. 



Peridinium. 



Planorbulina. 



Pleuronema. 



Polystomella. 



Spirillina. 



Spiroloculina. 



Trachelocerca. 



Truncatulina. 



Uroleptus. 



Uronema. 



Uronychia. 



Vertebralina. 



Vorticella. 



Prof. Edwin Linton presents the following report of his work upon the 

 animal parasites of fishes and other animals : 



Preliminary Report on Animal Parasites collected at Tortugas, Florida, 

 June 30 to July 18, 1906, by Edzvin Linton. 



In the table on pages 114-115 will be found a list of the hosts which were examined 

 for parasites, and a summary of the results of that examination, together with a few food 

 notes. Where no food is recorded it is to be understood that either the alimentary canal 

 was empty or the nature of its contents could not readily be identified. 



While a more comprehensive search, extending over not only a greater range of 

 species than is included in the foregoing list of hosts but also over a larger number of 

 individuals under each species, is desirable, and would doubtless add very many species 



