93 
the correct name will be Philocheras bispinosus (Westwood). 
In rgor Alcock defined Parapontocaris as a subgenus of Aegeon, 
from which it is distinguished by having the sterna of the first 
five pleon segments without instead of with a median spine, 
and by having the side-plates of the pleon wide and rounded 
instead of deep and pointed. Lastly, it may be mentioned 
that Argis, Kroyer, 1842, as I have ventured to maintain both 
in 1893 and 1900, properly takes precedence of the later Necto- 
crangon, Brandt. In this opinion I am now pleased to be con- 
firmed by the high authority of my friends Dr. W. T. Calman, 
D.Sc., and Mr. C. D. Sherborn, F.Z.S., of the British Museum, 
who have confirmed my belief that the supposed pre-occupation 
of Argis rested only on the existence of approximately similar 
names, such as Argas, Arges, Argus. Arga, Arge, Argo, Argia, 
Argya and Argeus may be added to the cluster, but neither 
singly or together can they drive Kréyer’s Argis out of the field. 
Gen. Pontophilus, Leach. 
1817. Pontophilus, Leach, Malac. Podophth. Brit., text to PI. 
374. 
1862. Cheraphilus (part), Kinahan, Proc. R. Irish Acad., Vol. 
WNP ts, 27 
1882. Pontophilus, Sars, Vid. Selsk. Forhandl., Christiania, 
No. 18, pp. 7, 45. 
1888. Pontophilus, Bate, Challenger Macrura, Reports, Vol. 
XXIV., p. 486. 
1890. Pontophilus, Ortmann, Zool. Jahrb., Vol. V., pp. 530, 533. 
1890. Pontophilus, Sars, Arch. Naturv. Christiania, p. 153. 
1895. Pontophilus (part), Ortmann, P oc. Acad. Philad., p. 175. 
1898. Pontophilus (part), Ortmann, Bronn’s Thierreich, Vol. 
V4 Lieferunes50:sps nes. 
1900. Pontophilus, Stebbing, South African Crustacea, Pt. 1, 
PP. 47; 49- 
1901. Pontophilus, Alcock, Catal. Indian Macrura, p. 115. 
1902. Pontophilus, Fulton and Grant, Proc. R.S. Victoria, p. 62. 
1903. Pontophilus, Gurney, Proc. Zool. Soc. London, Vol. II., 
Pi: 1) p: 26. 
Among the Crangonidae this genus is distinguished by having 
the second peraeopods much shorter than the rest, but perfectly 
chelate, the fingers of the fourth and fifth peraeopods not 
laminar, and the branchiae in seven pairs, with several of their 
apices turned backward. 
