32 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Genus MICROPANOPE Stimpson. 
Micropanope Stimpson, Bull. Mus. Comp. Zool., it, 139, 1SV1. 
Carapace of moderate width, slightly convex, regions usually lightly indicated, granulous or 
spinulons toward frontal and antero-lateral borders. Antero-lateral borders arcuate, shorter than 
postero-lateral, armed usually with five teeth or spines, of which the last is much reduced and the second 
also reduced or altogether wanting. Postero-lateral borders moderately converging. Fronto-orbital 
width great, three-fourths or more than three-fourths width of carapace. Front more than one-third 
the width of carapace. Front bilobed, outer angle rectangular, blunt, and situated below and in 
advance of inner orbital angle. Upper orbital margin with two small open notches and an intermediate 
lobe; inferior margin with a large outer notch; inner tooth prominent. Inner orbital hiatus wide; 
basal segment of antennae not reaching, or barely reaching, prolongation from front. Chelipeds 
unequal in both sexes, and usually roughened by sharp granules or spinules. Fingers pointed. Legs 
slender, usually spinulous above. Abdomen of male with third to fifth segments fused. 
Small species, living in deepish water. 
Key to the Porto Rican species of the genus Micropanope. 
A. Fronto-orbital width more than four-fifths of entire width of carapace lobifrons 
A’. Fronto-orbital width seven-tenths of entire width of carapace xanthiformis 
Micropanope lobifrons A. Milne Edwards. 
Micropanope lobifrons A. Milne Edwards, Crust. Reg. Mex., 327, pi. Lin, f. 3, 1880. 
Carapace almost smooth; some very small granule's on gastric robes and on branchial region; 
regions faintly indicated. Front wide and formed of two rounded lobes. Antero-lateral borders five- 
toothed, first or orbital tooth small; second triangular and about the same size; third and fourth 
spiniform, most prominent, the third the larger; fifth almost obsolete. Chelipeds covered with small 
pointed granules; an inner carpal spine; fingers deeply grooved. Ambulatory feet long, spinulous. 
Length of male, 3.3 mm. ; width , 4.3 mm. ; fronto-orbital width, 3.7 mm. ; width of front, 1.7 mm. 
Off Montserrat, 88 fathoms (type locality); off Ilabana; near Aspinwall, 34 fathoms; off St. 
Thomas, 20 to 23 fathoms, station 6079, Fish Hawk. 
Micropanope xanthiformis (A. Milne Edwards). ( 
Panopeus xanthiformis A. Milne Edwards, Crust. Rdg. Mex., 353, pi. liii, f. 4, 1880. 
Micropanope xanthiformis Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, iv, 274, 1898. 
Carapace depressed, coarsely granulous on anterior half; regions ■well marked; an oblique ridge 
on hepatic region. Front deflexed; lobes separated by narrow fissure; margins sinuous, on the whole 
convex, with a distinct rectangular outer corner. Orbits wide, margin finely crenulate. Five antero- 
lateral teeth; second small, blunt, in adults considerably larger than postorbital angle, in the young 
obsolete; third and fourth large, acute; last very small and pointed; teeth with granulous margins. 
Chelipeds rugose with very fine granules. Arm with a row of spines above; wrist with a deep 
anterior groove and two inner spines, one smaller and below the other; hand roughened on its upper 
and proximal portions, a deep groove above. Fingers deeply grooved ; dactylus of large hand with 
large basal tooth. Meral joints of legs with a row of spines above, other joints spinulous. 
Length of male, 7 mm.; width, 10 mm.; fronto-orbital width, 7 mm.; frontal width, 3.7 mm. 
From Cape Hatteras, N. C., to Cape Frio, Brazil, in 15 to 182 fathoms. Off Puerto Eeal, Porto 
Rico, 8) fathoms, station 6074, 1 young specimen. 
Genus GLYPT0PLAX Smith. 
Gli/ptnplax Smith, Trans. Conn. Acad. Sri., n, 164, 1870. 
Carapace narrow, hexagonal, deeply areolated, front prone nent, antero-lateral margin dentate. 
Chelipeds short and stout; man us more or less crested above, the upper proximal angle often very 
prominent; ambulatory legs slender and smooth. First segment of abdomen of male reaches coxae 
of fifth pair of feet; second segment is shorter and exposes a portion of sternum; third segment may 
or may not reach coxal joints; third, fourth, and fifth segments coalesced. 
This genus inclines toward the Catometopa. 
