#? >5!r/?er oe lit w tic OP im an spn 



The above diagram illustrates the decimal formula used herein. 6, 7, 8, 10, 6 are 

 the transverse measurements, while 7, 14, 28, 50, 88 are the corresponding longitudi- 

 nal measurements. The formula in this case is : - 14- 28 ' 50- 88- . The unit of 



6. 7. 8. 10. 6. 



measurement is the hundredth part of the length of the body, whatever that may be. 

 The measurements become, therefore, percentages of the length. The absolute length 

 is given in millimeters as a final non-paired term. The measurements are taken 

 with the nema viewed in profile ; the first are taken at the base of the pharynx, the 

 second at the nerve-ring, the third at the cardiac collum or end of the neck, the 

 fourth at the vulva in females and at the middle (M) in males, the fifth at the anus. 

 Fig. 68. M. recessus, n. sp. No. 21-b. Striae excessively 

 fine. Lips with 14 papillae. Intestine about 5 cells in girth, 

 2.8 6.9 30. '63 12 91.5 faintly tessellated. Cau- 



2^ 27i 27? 274 TF^ dal glands small and 



inconspicuous. Tail tapering rapidly on the ventral side 

 behind the anus ; thence onward arcuate and conoid, with 

 spinneret. Habitat: soil of a tomato field, Naranjo, Fla. 

 This species, together with decurrens and dentatus, constitute 

 the new sub-genus Sporonchulus; it is interesting to note 

 that so far as known all of them are tropical and below the 

 x 750 ^ m ^ i" average size. 



Fig. 69. M. decurrens, n. sp. No. 21-c. Striae excessively 

 fine. Intestine 7 to 8 cells in girth, the cells packed with 

 granules, which, however 2.9 9. 24. Y 95.9 

 do not give rise to a tessel- 2 - 9 4. 4.2 4.6 2. 

 lated appearance. Tail arcuate conoid, tapering from in front 

 of the anus. No spinneret, or doubtful ; no caudal glands. Ex- 

 cretory pore (?) just behind the nerve ring. Anus more or 

 less elevated. Habitat : Plant Introduction Gardens, Miami, Fla. 



53-b. M. fasciatus, n. sp. Like M. bathybius, No. 53. Characterized by large, 

 powerful lips, set off by a deep constriction, in 2.4 5.6 16. '64'=" 90. ^ ^ ^ 

 the depths of which is a double refractive line. 2.3 2.3 2.4 2.4 1.8 

 Teeth 3, small, equal, sub-basal ; tail conoid, no spinneret. Papillae 14. Habitat : 

 About roots of camphor, Florida. Nemativorous. 



Erratum. 



After Soil Science went to press it was found that similis and tenuis are invalid 

 as designations of new mononchs, owing to Mononchus similis Cobb 1893, and 

 Mononchus tenuis Daday 1908, the latter not a mononch. The present M. similis is 

 therefore hereby changed to M. subsimilis, and M. tenuis to M. sub tenuis. The ref- 

 erence to M. megalaimus in "Nematodes mostly Australian and Fijian," Cobb, is a 

 misprint for M. gymnolaimus. The overlooked M. similis is as follows : 



53C. M. similis Cobb. 3.3 8. 24. u '58' u 86. Pharynx three-fifths as 



wide as the head, two- 3. sTs 471 4~5 2A 1-8 mni thirds as wide as long ; 

 tessellated intestine fifteen cells in girth ; anus conspicuous, depressed ; spinneret 



one-eighth as wide as the base of the tail. 

 Clarence River, Australia. 



Habitat : About roots of cane, Harwood, 



