PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 435 
B 
B 
Length of left propodus 
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Stations 873 and 878; 100 and 142 fathoms. 
This species is at once distinguished from A. stirynchus and A. serratus 
by the narrower and acuminate rostrum, the teeth on the dorsal carina, 
the form of the chelipeds, and the more slender second, third, and fourth 
pairs of legs. In A. stirynchus and serratus the carpus in the second 
pair of legs is short, expanded distally, and less than half as broad as 
long, and the chela is nearly or quite half as broad as long. 
Axius serratus Stimpson (Proc. Boston Soc. Nat. Hist., iv, p. 222, 1852; 
Smith, Trans. Conn. Acad., v, p. 55, pl. 10, fig. 4, 1879) was dredged the 
past season from the “Fish Hawk”, in 20 fathoms, sandy bottom, in 
Narragansett Bay; and large specimens, taken on George’s Banks, have 
been presented to the National Museum by Capt. John Q. Getchell and 
crew of the schooner “ Otis P. Lord”, of Gloucester, Mass. 
These specimens show that Stimpson’s species is distinct from the Eu- 
ropean stirynchus. The serratus is at once distinguished by its broad 
and depressed abdomen, which expands laterally in the middle, and is 
much broader than the carapax. The fourth segment of the peduncle 
of the antenna and the acicle are both proportionally much longer in 
serratus than in stirynchus, being nearly as long as in the species just 
described. The upper edge of the propodus in both chelipeds is thin 
and strongly carinated in serratus, but thick and rounded in stirynchus, 
and the smaller cheliped is much narrower and has much longer and 
more slender digits in serratus than in stirynchus. 
Pontophilus Norvegicus M. Sars. 
Stations 869, 870, 880, 881, 893, 894, 895; 155 to 372 fathoms. 
The largest females are 74°” long, the largest male 47", Several of 
the specimens belong to the variety with the broad and obtuse rostrum 
described by Sars. 
Pontophilus brevirostris, sp. nov. 
Very closely allied to P. spinosus and P. Norvegicus, but readily dis- 
tinguished from both these species by the very short rostrum, which is 
tridentate, with the median tooth scarcely broader and very little longer 
than the lateral, about reaching to the cornea of the inner side of the 
eye and not projecting beyond the line of the spiniform outer angles of 
the orbits. The proportions of the body are more like spinosus than 
Norvegicus, but the carination and armature of the carapax are more 
