SCOLECIDA, 
609 
Quart. Joiirn. Micr. Science, January 1866, p. 25), which refers to the brief 
notice of this discovery by Leuckart in Nadir. Gesellsch. Wiss. Gott. 1865, 
p. 219 ; then to Leuckart’s letter in Archiv fiir Anat. 1865, p. 641 {vide Zool. 
Record for 1865). Prof. Leuckart’s indignant repudiation of the charge im- 
plied against him of having appropriated to himself some of the results of his 
pupil’s work is met by a pamphlet published by Mecznikow, entitled Ent- 
gegnimg auf die Erwiderung des Herrn Prof. Leuckart in Giessen in BetrelF 
der Frage iiber die Nematodenentwicklung,” Gottingen, 1866. 
We have given above a brief account of the very interesting researches of 
Leucltart & Mecznikow on the development of the Nematoids. In recording 
the fact of a controversy existing between the Professor and his very intelli- 
gent and painstalcing pupil as to a question of priority of discovery, we are 
of course not called upon to pronounce any opinion on the subject. 
Schneider {L c. p. 28) divides the Nematoidea into, 1. Poly- 
MYARii, 2. Meromyarii, and, 8. Holomyarii, and gives the 
following list of genera : — 
I. Muscles of the body, consisting of very numerous cells, arranged 
closely and one behind the other. 
1. Ascaris (R.). 2 symmetrical spicula ; 20 and more preanal papillae. 
2. Eustrongylus (Dies.). A spiculum (?) ; bursa cup-shaped. 
3. Etioplus 2 symmetrical spicula ; bodies of both $ and $ with 
many papillae; the papillae of the tail of the male passing into the body-papillae. 
4. Ehysaloptera (R.). 2 unsymmetrical spicula ; bursa closed, heart-shaped, 
surrounding the apex of the tail ; a single papilla for the anus ; 10 papillae 
all constant. 
6. Ileteralds (Duj.). 2 unsymmetrical spicula; (J with a sucking-disk at the 
anus ; 3 large preanal papillae. 
6. Filaria (M.). 2 misymmetrical spicula ; 4 preanal papillae. 
7. Ancyracantlim (Dies.). 2 unsymmetrical spicula ; 15, 16, or 20 preanal 
papillae, singly or in pairs, arranged in rows. 
8. Hedruris (Nitzsch). 2 symmetrical spicula ; 2 preanal papiUae. 
9. Ceratospira (Schn.). 2 unsymmetrical spicula ; 11 (?) preanal papiUae. 
10. Cucullanus (M.). 2 symmetrical spicula ; 7 preanal papillae. 
II. Muscles of the body, consisting of eight rows of cells, placed one 
behind the other. 
11. Nematoxys (Schn.). 2 symmetrical spicula; cf and 5 with many 
papillae over the whole body ; the tail-papillae of the passing into the body- 
papillae ; vagina with sphincter muscle. • 
12. Oxysoma (Schn.). 2 symmetrical spicula ; 3 large constant preanal pa- 
pillae ; vagina with sphincter. 
13. Oxyuris (R.). 1 spiculum ; bursa present or absent ; vagina with 
sphincter. 
14. (Schn.). 2 symmetrical spicula ; tail-papillae of the J leng- 
thened out into a kind of forceps. 
15. Dermatoxys (Schn.). No spiculum ; bursa broad. 
16. Atractis (Duj.). 2 unsymmetrical spicula; 3 preanal papillae. 
17. Spiroxis (Schn.) ? 
18. Strongylus (R.). 2 symmetrical spicula ; bursa closed all round, form- 
ing a funnel ; all the papillae with costae ; the 6 anterior papillae constant, 
1866. [voL, III.] 2 R 
