NEMATOHELMINTHES. 
Verm. 13 
were quite new. Tylenchus pillulifer, pi. i. fig. 1 ; the first species of 
this genus found to be aquatic. These three were free-living. The 
following parasitic : Tricliosoma papillifer^ sp. n. (intestine of Hirundo 
ttrhica), pi. i. fig. 11, possibly identical with that found in 11. rustica, but 
this latter has never been described, and has no specific name. Filaria 
tridentata, sp. n. {Colymhus arcticus), pi. i. fig. 17, male pi. xii. fig. 7 ; a 
similar tridentate tooth has been observed in F. laticeps (Schneider). 
F. tuherculata {— Spiroptera alternata, auct.) ; found in Hirundo urbica, 
pi. i. fig. 18. F. hamata (in Falco nisus^, pi. i. fig. 19. Agamonematodum 
tritonis (Polymyarian) found as a larval form in intestine of Triton 
tamiatus). A. geotrupis, body cavity, and especially fatty bodies of 
Geotrupes stercorarius, pi. i. fig. 20; and in (12) Filaria turdi (in Turdus 
iliacus), sexually immature Polymyarian, pi. xii. fig. 3. F. strigis (= 
Trichina affinis^ Wedl., pt.), pi. xiv. fig. 28. Trichosoma pachy derma 
(oesophagus of Podiceps minor). T. breve (intestine of Totanus fuscus) 
females only. Ascaris vimbee (intestine and liver of Abramis vvnba), 
pi. xii. fig. 8. 
MonohyHera bulbosa, sp. n., Oromma,iu the Aralo- Caspian Expedition, 
p. 102, pi. iv. fig. G. 
Trichosoma recurvmn, Solger (30), from a young crocodile (? C.acutus)^ 
said to come from Mexico ; females only observed. 
Oxyuris Icuenckeli, found in Blatta americana, and 0. blatticola, from 
B. germanica, B. laponica, and B. livida, Ghaleb (28). 
The following forms are also described by Linstow (11) : — Gordius 
aguaticus, Grube, in which he finds five layers in the integument, whereas 
Meissner only noted three ; he has also discovered in Limnccus vulgaris 
the encapsuled embryos of this species, pi. i. figs. 4-6. Tropidocera 
paradoxay Diesing, pi. i. figs. 7 & 8. Strongylus patens^ Cuj., pi. i. figs. 
9 & 10 ; Linstow finds two, and not, with Dujardin, one papilla anterior 
to the tail in the female. Oxyuris blattce-orientalis, Hammerschmidt, 
pi. i. fig. 12. Physaloptera alata, R., pi. i. figs. 13-15 ; some omissions 
from Schneider’s observations are supplied. Filaria leptoptera, Rud. (this 
species does not belong to Spiroptera), pi. i. fig. 16. Filaria obvelata^ 
Creplin (= Cosmocephalatus alatus, Molin, = Eistiocephalus spiralis^ 
Diesing), pi. xii. figs. 4-6. Trichosoma contortum, Creplin, T. resectum^ 
Duj. (the bands of spines are, in age, replaced by three dark distinct 
longitudinal bands), T. obtusum, Rud., Dispharagus denudatusj Duj., and 
Cucullus pachystomus, Linstow, appear to be identical. Oxysoma brevi- 
caudatum, Zed. (= Heterachis brevicaudata^ Duj*)) P^* %• Nema- 
toxys corfimutatus, Rud. (= Ascaris acuminata, auct., pt,, and A. brevi- 
caudata, auct., pt.). The difference stated by Schneider to exist between 
the muscle cells of N. commutatus and N. ornatus does not obtain (pi. xii. 
fig. 10). N. ornatus, Duj. (= ■ Oxyuris ornata, Duj., and 0. ornata, 
Walter), pi. xii. fig. 11. 
Anatomy and Physiology. 
Brandt (26) points out that the germinal vesicle varies greatly in form 
in consequence of its amoeboid movements, and that this may lead to its 
