THE BRACHYURA AND MACRURA OF PORTO RICO. 
93 
cheliped rather short. Ischium less than twice as long as broad and with two or three faint spinules 
on its lower margin. Merus oblong-oval, unarmed. Carpus subtriangular with thin upper and lower 
margins, the distal margin closely articulated with manus. Manus also with thin margins; palm longer 
than fingers, and longer than broad. Pollex with a 
sharp crest on outer surface, one-third the distance 
from prehensile edge and extending a little ways 
upon palm; prehensile edge with a spiniform tooth 
at its middle, pointing toward tips of fingers. Dac- 
tylus with a broad rounded tooth on proximal third 
of its cutting edge. Seventh abdominal segment ob- 
long-triangular, with a few lateral marginal spinules 
on each side. Caudal laminte oval, of about equal 
length and subequal to telson. 
Length of male from tip of rostrum to tip of 
telson, 9 mm.; length of carapace, 3.1 mm.; length 
of manus of larger cheliped, 3 mm. ; length of palm, 
2 mm.; length of carpus, 0.8 m. 
This species is smaller than the last and may 
at once be told by the crest on the pollex and the 
peculiar dentation of the fingers. 
Types, Mayaguez Harbor, 161 to 172 fathoms, 
sand, mud, station 6066, 2 specimens (Cat. No. 23779). Another specimen was dredged in the 
same harbor in 25 to 30 fathoms, sand, mud, and shells, station 6062. 
Genus GLYPTURUS Stimpson. 
Glypturus Stimpson, Proc. Chicago Acad. Sci., I, 46, 1866; Ann. Lyc. Nat. Hist.. N. Y., x, 120, 1871. 
Merus and ischium of external maxillipeds not dilated, no broader than propodus and concave on 
outer surface; ischium armed along middle of inner surface with a sharp, prominent, spinous crest; 
carpus thick, and only half as broad as propodus, which is greatly dilated within, and truncated, but 
not grooved, at broad, anterior margin, against which the dactylus folds; dactylus rather stout, com- 
pressed, and rather longer than anterior margin of propodus. Mandibles strong, much indurated; 
corona with its margin unevenly toothed, deeply cleft within, and with basal process as broad and half 
as high as corona itself, and having also a toothed edge. Appendages to first two joints of abdomen of 
male nearly similar to corresponding parts in female. Caudal lamelke deeply sculptured. Of the 
appendages to the penult joint of abdomen, the outer lamellae appear as if composed of two pieces 
soldered together, the outer one of which overlaps inner; inuer lamellae obliquely triangular. Terminal 
segment of abdomen very small. (Stimpson. ) 
Glypturus branneri Rathbun. 
Glypturus branneri Rathbun, Proc. Washington Acad. Sci., ii, 150, pi. vm, figs. 5-8, 1900. 
Dorsal suture very deep. Front with a sharp, acute, depressed rostrum, and on either side above 
insertion of antennae a shallower subacute projection. Eye-stalks subtriangular, with convex upper 
surface, and contiguous nearly to their narrow truncate extremities, which are obscurely dentate. 
Terminal joint of peduncle of the antennulse about 1.4 times as long as penult joint. Antennulse 
nearly as long as carapace. Peduncle of antenna more slender than that of antennula; its penult joint 
reaches middle of terminal joint of peduncle of antennula. Flagellum more than twice as long as that of 
antennula. Outer maxillipeds similar to those of G. acanthochirus; ischium and merus wider, propodus 
somewhat longer and narrower, dactylus more slender than in that species. Outer surface pubescent, 
inner margin long-hairy. Large cheliped finely and inconspicuously dentate on its lower margin. 
Merus twice as wide as ischium. Carpus nearly as wide as the manus and twice as wide as long. Palm 
nearly as wide as long. The fingers cross when closed. The dactylus has three teeth on prehensile edge. 
Smaller cheliped with carpus and manus less than half as wide as in larger cheliped, and elongate. 
Both chelipeds with tufts of long hair on margins. Inner caudal lamella as broad as long. Outer branch ' 
of outer lamella completely overlapping and coalesced with inner branch, and only slightly shorter. 
male, x 8. (6) Tall fan, x 13.33. (c) Anterior portion, 
X 15. ( d ) Maxilliped, x 16. 
