THE HRACH VTJRA AND M A OR MR A OF PORTO RICO. 
107 
Alpheus floridanus Kingsley. 
Alpheus Jloridanus Kingsley, Bull. U. S. Geol. Survey, IV, 193, 1878. 
Rostrum a sharp spine falling far short of the second antennular segment. Orbital margin rounded, 
without a spine. Second antennular segment very long, more than twice as long as third. Scale very 
short, its spin i form tip reaching half-way between rostrum and second segment. Antennal scale a 
little longer than antennular peduncle; antennal peduncle considerably longer. Basal spine very short, 
less advanced than rostrum. Propodus of chelipeds elongate and much compressed; margins entire; 
inner and outer surfaces in large cheliped with a broad, shallow groove leading from pollex; surface 
granulate; dactylus nearly as long as upper margin of palm. Propodus of smaller cheliped much more 
"slender, fingers considerably longer than palm. Carpal joints of second pair diminish as follows: Sec- 
ond, first, fifth and fourth, and third; second nearly as long as third, fourth, and fifth taken together. 
Length of Porto Rican specimen, 41.5 mm. 
Porto Rico: Mayaguez Harbor, 7 to 18 fathoms, stations 6059 and 6061; Puerto Real; off Puerto 
Real, 8.} fathoms, station 6074; off Boca Prieta, 81 fathoms, station 6075; off Humaxjao, 91 fathoms, 
station 6099; Fajardo. Fort Jefferson, Fla. (Kingsley). 
Alpheus heterochaelis Say. 
Alpheus hcterochsdis Say , Jour. Acad. Nat. Sci. Phila., 243, 1818. 
Alpliens helerochelis Herrick, Mem. Nat. Acad. Sci., v, 372, pi. n (colored), 1891. 
Rostrum carinated, slender, either reaching or nearly reaching to end of first antennular segment. 
Orbital margin rounded, without a spine. Second antennular segment twice as long as third; scale 
with a slender terminal spine reaching end of first segment. Antennal peduncle as long as or longer 
than antennular; scale longer than antennular peduncle; basal spine very short, reaching only slightly 
beyond orbital margin. Chelipeds very unequal. Propodus of larger cheliped much distorted and 
deeply and irregularly grooved; outer and inner margins with a deep notch near fingers. Dactylus 
more than half as long as palm, its distal margin almost at right angles to outer. Smaller cheliped 
very slender, palm slightly notched; fingers proportionally longer than in large cheliped. Carpal 
joints of second pair diminish as follows: First, second, fifth, third, fourth; the first, being equal to the 
sum of the last three. 
Length of Porto Rican specimen, 27.7 mm. 
Porto Rico: Mayaguez; Boqueron Bay; Arroyo; off Vieques Island, 16 fathoms, station 6092; 
Hucares; Ensenada Honda, Culebra. The specimens from Mayaguez, Hucares, and station 6092 have 
the rostrum more flattened at the base, as in Rankin’s I. lavrimslris; whether this last has specific 
value I am unable to determine. 
North Carolina to Rio de Janeiro (Kingsley) ; Bermudas (G. Brown Goode, coll.); Lower California 
(Loekington) ; west coast of Nicaragua and Panama (Kingsley); Mamanguape to Maceio, Brazil 
(Branner- Agassiz Exped., 1899). 
Alpheus packardii Kingsley. 
Alplicus paekardi i Kingsley, Proc. Acad. Nat. Sci. Phila., xxxi, 417, for 1879 (1880). 
Alpheus berrnuA crisis Bate, Challenger Rept., Zool., xxiv, 547, pi. xovm, f. 3, 1888. 
Alpheus minus Herrick, Mem. Nat. Acad. Sci., v, 372, pi. i (colored), 1891 (nec Say). 
Rostrum carinated, carina extending behind eyes; extremity spin i form reaching nearly to second 
antennular segment. Margin of orbit projecting as a blunt tooth. Second antennular segment nearly 
twice as long as third; scale about as advanced as rostrum. Antennal peduncle and scale subequal, 
slightly longer than antennular peduncle. Propodus of chelipeds greatly compressed; a triangular, 
longitudinal groove on both upper and lower surfaces near outer margin; the margin between these 
grooves forms a tooth near distal end of palm; between this tooth and the dactylus is a notch in the 
margin; inner margin with shallow sinus. Smaller propodus half as wide as larger and similarly formed ; 
a sharp spine on distal end of outer margin of upper surface. Carpal joints of second pair, diminish 
as follows: Second, first, fifth, third, and fourth; the second being very slightly greater than first. 
Length of Bermudan specimen, 24.5 mm. 
Porto Rico: Mayaguez; Boqueron Bay; Playa de Ponce; Arroyo; off Vieques, 6 to 16 fathoms, 
stations 6085, 6091, 6092, 6095, 6096; off Culebra, 14f to 15 fathoms, stations 6086, 6093; Ensenada 
Honda, Culebra; Fajardo. 
Beaufort, N. C. (Herrick); Key West (Kingsley) ; St. Thomas (Bate); Bermudas ( Bate and U. S. 
Nat. Mus.). 
