cobb: new nematode genera 437 



Anterior three-fifths of the oesophagus tubular, coiled, uncoiling when 

 spear is thrust out; posterior two-fifths half as wide as the neck. Ventral 

 row of about seven innervated, slightly elevated supplementary organs occupy- 

 ing a space about four times as long as the tail. Spicula arcuate, rather stout, 

 swollen in the middle, tapering both ways; proximal ends hardly cephalated. 

 Accessory pieces present. Flemming to glycerine. The measurements in par- 

 entheses are taken at the base of the spear. 



Habitat; distribution. About the roots of a variety of plants, — corn, grass, 

 citrus trees, on the Atlantic and Pacific slopes of the United States. 



Genus represented in many parts of the world. Known to the writer from 

 North and South America, Europe, Asia, and Oceanica. There are beyond doubt 

 dozens of species, possibly hundreds. Form usually more slender than in Dory- 

 laimus. 



2. Atylenchus decalineatus, n.g., n.sp. 



Striae about 200; interrupted by 

 ?--_, 3...1 .i.2.:/„^...i.a... -.66 "%'-Q- '6 mm. ten longitudinal grooves. Setae 



i. 2.1 2._5^2i9 2.9 1.9 . /..i , i 



45 near the margin ot the head, 



^=. |-*-| "^-•••^•4>""|--,y— ~-g;9 "ivs" '^ ™"' slender, spreading, nearly as long 



~ as the head is wide. Spear acute, 



shaft half as wide as the adjacent annules; its bulb twice as wide. Median bulb 

 ellipsoidal, half as wide as the neck with small valve; posterior swelling 

 oblong, half as wide as the neck, without valve. No supplementary organs 

 or special male papillae or setae. Spicula arcuate, one and one-third times 

 as long as the anal body diameter, tapering; constricted slightly at the 

 proximal end. Hot sublimate to balsam. 



Habitat; distribution. On roots of cranberries {Oxycoccus macrocarpus) , 

 Cranberry bog, New Lisbon, New Jersey, Atwood Grove, Fla. 



3. Eutylenchus n. g. setiferus (Cobb) n. Comb. 



r^ .2.-.5 .i.o.-.-r .!&.• 7K......Ski.^. .7 mm. Amphids unknown. Caudal glands 



'~ * probably absent. Supplementary 



organs absent. Other characters as given in the original description of the 

 species. (Agricultural Gazette of New South Wales, Vol. IV, Part 10, Oct., 1893.) 

 Measured fresh. 



Habitat ; distribution. Genus here established for the reception of the writer's 

 Tylenchus setiferus, found about the roots of plants in Northern New South 

 Wales, Australia. Tylenchus setiferus, Cobb, thus becomes the writer's Eutylen- 

 chus setiferus. 



4. Iota squamosa, n.g., n.sp. 



Striae about 150, each subdivided, 

 r_ ...•.7.....(.i.5:.!....?.Q.-.-^.-..2.?.-....!.5.4— ?.§-• 8 mm. and consisting of eight squamules. 



l^ £.6 (7.) 7,2- 7,3 5.3 3.9 .,• j -i 



37 Spear one-third as wide as one 



(;^ „,.7...Jiaa......V.:..2.2...^..rM....5.|.:.^.. .3 mm. of ^^e annules, posterior fourth 



twice as wide; bulbous base one- 

 third as wide as the neck. Tail convex-conoid, of nine annules. Vulva between 

 the twelfth and thirteenth annules. No male supplementary organs or pap- 

 illae. Spicula twice as long as the anal body-diameter, slender, tapering, acute. 



