NO. 6 
DECAPOD AND OTPIER CRUSTACEA SCHMITT 
13 
Xearly all of our specimens have four dorsal rostral teeth, of which 
two, usually, were on the carapace and two on the rostrum proper; 
one specimen had five teeth above ; and one with an unusually short 
and certainly abnormal rostrum had only three teeth above ; below 
there is mostly but a single tooth, sometimes two. 
Outer antennular flagellum has 7-1 1 (usually 8-9) free joints and 
5-7 fused, the free portion is longer than the fused, except in very 
young and small specimens. 
The multiarticulate carpus of the second pair of legs may have 
from 20-25 articulations. 
As compared with L. galapagensis Schmitt, L. paucidcns has fewer 
dorsal rostral teeth, and a relatively longer rostrum which is nor- 
mally longer than the eyes by that portion which lies anterior to the 
ventral tooth and which reaches about or even beyond the middle of 
the second joint of the antennular peduncle. The first pair of legs, 
the chelipeds, are relatively more slender, the second pair noticeably 
longer ; and there are consistently more joints to the free portion of 
the outer antennular flagellum. The ambulatory legs and the body 
habitus of the two species are very much alike. 
Brachycarpits bhinguiculatiis (Lucas) ij 
Kemp (Rec. Indian Mus., vol. 27, pt. 4, p. 312, 1925) has dis- 
cussed this species and given rather full synonymy. He very prob- 
ably correctly regards Nobili’s B. ad vena from the Red Sea (Ann. 
Sci. Nat., Zool. (9), vol. 4, p. 75, pi. 4, fig. i, 1906) as a synonym of 
B. biunguiculatiis. 
It was somewhat of a surprise to find a single small female of B. 
binngiiiculatiis about 20.3 mm. in length among the Crustacea col- 
lected at Clipperton. In fact, it was not until a drawing of the telson 
was completed that it was suspected that we were dealing with a 
BracJiycarpus at all. In most, if not all, particulars our specimen 
seems to fit the characterization of the species as set forth by Kemp, 
except ill the number of segments in the fused basal portion of the 
outer antennular flagellum, which apj^ears to have but seven seg- 
ments. Kemp gives a range of from 15 to 23 segments in specimens 
which he examined, which included some from the West Indies. I 
examined our WTst Indian and Bermuda specimens and found that 
the larger specimens, both male and female, from Bermuda, Puerto 
Rico, and Barbados, upward of 40 mm. in length, had 15 to 21 seg- 
ments in the fused basal portion of the outer flagellum, and about 
the same number in the thicker, free portion. On the other hand, the 
small specimens, mostly from 25 to 27 mm. in length (one 39 mm.), 
