263 
H. A. Baylis 
present. No oesophageal appendix. Small interlabia present. Dentigerous 
ridges present. 
Species: 
A. colurum (Baylis, 1919) (genotype) from Lophoaelus occipitalis. 
A table may now be given which will serve to distinguish the genera 
mentioned, and also show to some extent the relationships supposed to exist 
between them. 
A. Oesophagus divided into an anterior muscular portion and a posterior 
ventriculus, the latter being oblong or sigmoid in shape, or having a posterior 
appendix. 
(a) An intestinal caecum present. 
(a) An oesophageal appendix present ...Contracaecum. 
(8) Oesophageal appendix absent... Porrocaecum. 
( b ) No intestinal caecum. 
(a) An oesophageal appendix present .. .Raphidascaris. 
(p) Oesophageal appendix absent... Anisakis. 
B. Oesophagus without ventriculus, with or without a small but distinct 
posterior bulb. The latter, if present, spherical and without a posterior 
appendix. An intestinal caecum present. 
(a) A distinct spherical oesophageal bulb present... Dujardinia. 
(b) Distinct oesophageal bulb absent. 
(a) Small interlabia present... Amplicaecum. 
(P) Interlabia absent... Angusticaecum. 
We have now to consider the position of the genera which were removed 
from the rest of the “ Heterocheilinae ”— Heterocheilus, Typhlophorus, Goezia 
and Crossophorus. The last-named genus seems so unlike any other Ascarid 
at present known that it may at once be placed in a subfamily by itself, which 
may be called Crossophorinae, n. subfam. 
As regards the remaining three genera, it may be well to recall that von 
Drasche (1884) placed Leccinocephalus (= Goezia) and Heterocheilus in separate 
categories, which he named Lecanocephalidea and Heterocheilidea respec¬ 
tively. Considering the peculiarities of the genera in question, it seems not 
unreasonable to retain von Drasche’s arrangement, and altering his names 
in accordance with the plan of modern nomenclature, to place Heterocheilus 
and Typhlophorus together in a subfamily Heterocheilinae (or, in other 
words, to restrict Railliet and Henry’s (1912) subfamily to these two genera), 
and Goezia by itself in another subfamily, Goeziinae. 
REFERENCES. 
Baylis, H. A. (1919, a). A new Species of the Nematode Genus Crossoceplialus from the 
Rhinoceros. Ann. and Mag. Nat. Hist. (9) iv. 94. 
- (1919, b). Crossophorus collaris Hemprich and Ehrenberg, a little known Nematode 
Parasite of the Hyrax. Ibid. (9) iv. 343. 
