MARINE PROTOZOA FROM WOODS HOLE. 
421 
Genus HETEROPHRYS Archer. 
The body is globular with but slight differentiation into ectoplasm and endoplasm; one nucleus in 
the latter; contractile vacuoles one or many; pseudopodia on all sides, thin, and with peripheral 
granule-streaming; surrounded by a globular, rather thick coat of jelly, which is hyaline inside and 
granular on the periphery. Fresh and salt water. 
Heterophrys myriapoda Archer. Fig. 6. 
Synonym: II. marina Hert. & Less. ’74. 
Diameter 25 to 80//; pseudopodia twice as long as the body diameter; the plasm often contains 
chlorophyl bodies (Zoochlorella). The granular part of the gelatinous layer is thick (up to 10//). 
The spine-like processes are very thin and short. (Schaudinn ’95. ) The marine form found at 
Woods Hole probably belongs to this species, as described by Schaudinn. The short pseudopodia 
which give to the periphery a fringed appearance are quite regularly placed in connection with the 
pseudopodia. The latter are not so long as twice the body diameter, the longest being not more than 
equal to the diameter of the sphere. The body inside of the gelatinous covering is thickly coated 
with bright yellow cells similar to those on Radiolaria. The animal moves slowly along with a rolling 
motion similar to that described by Penard ’90, in the case of Acantlioeystis. Diameter of entire globe 
35//; of the body without the jelly 18//. The extremely tine granular pseudopodia are 8 to 35// long. 
Common among algae. 
This form was probably meant by Peck ’95, when he figured “a lieliozoon.” 
Key to orders of Flagellidia. 
Small, body usually amoeboid; 1 or more flagella; no mouth Order Monadida. 
Small; plasmie collar around the flagellum Order Choanoflagellida 
With 2 or more flagella; one trails behind Order Heteromastigida 
With 3 or more flagella, none of which trails Order Polymastigida. 
Large; firm body wall; 1 or 2 flagella; mouth or pharynx, or both Order Eugi.enida 
Medium size; with chlorophyl, no mouth, usually colonial Order Ph ytoflagelljda. 
Small; silieious skeleton; parasitic on Radiolaria or free Order Silicoflagellida 
(One genus, Disteplianus Stohr), p. 427 
Key to the families of Monadida. 
No mouth; 1 or 2 flagella; amoeboid with lobose or ray-like pseudopodia Family Rhizomastigidx 
Mouth at base of single flagellum; plastic; no pseudopodia Family Cercomonadidx 
One flagellum; inclosed in gelatinous or membranous cups Family Codonceeidie 
One flagellum; tentacle-like process at base of flagellum; inclosed in cup Family Bikoecidx 
One main flagellum and 1 or 2 accessory flagella Family Hetercmonadidx 
Key to marine genera of Monadida A 
Family Rhizomasligidx : 
1. Flagellum repeatedly thrown off and reassumed 
2. Flagellum never thrown off . 
3. a. Pseudopodia lobose ._ 
b. Pseudopodia ray-like 
Family Codonxeidx: 
1. Goblet-shaped cups adherent by stalk 
Family Ileteromonadidx: 
1. The long flagellum vibratory 
2. The long flagellum rigid; shorter one vibrates 
Genus *Masligameeba in part, p. 422 
3 
. Genus Mastigamxba 
Genus Mastigophrys 
Genus * Codonceca, p. 423 
Genus * Monas, p. 423 
Genus Sterromonas 
Key to marine genera of Choanoflagellida. 
1. Without gelatinous or membranous test 
2. With gelatinous or membranous test 
3. a. Attached forms: 
1. Without a stalk, or with a very short one 
2. With a long, simple, stalk 
3. With a long, branched, stalk 
b. Free-swimming 
4. Colonial, and with a gelatinous covering 
3 
4 
..Genus * Monosiga, p, 423 
Genus * Codonosi.ga, p. 424 
Genus Codonocladium 
Genus Desmarella 
Genus Proterospongia 
Presence at Woods Hole indicated by asterisk. 
