BULLETIN OF THE UNITED STATES FISH COMMISSION. 
'98 
1 tiniensions of female from Porto Rico: Length of carapace from tip of rostrum, 114.5 mm. ; width 
at anterior angles, 91 mm.; greatest width, 98.5 mm.; length of animal from tip of outer antennse to 
ti) » of telson, about 29 cm. 
Porto Rico: Cabo Rojo; San Juan, where it is sold in the market (Gundlach). Bermudas (T. H. 
Bean, coll. ); Florida Keys to Brazil. 
Family PALINURI 1 LE Latreille 1802 (Palinmini); Leach 1814 (Palinurini). 
Carapace longitudinally subcylindrical, with orbits for the eyes partially excavated. Second 
antennse subcylindrical, with a long, rigid multiarticulate flagellum. Branehise as in the Scyllaridx. 
Genus PANULIRUS White. 
Panulirus White, List Crust. Brit. Mus., 69, 1847. 
No central rostri form tooth; the ocular segment exposed and membranous; flagella of first antennse 
long and slender, and their segment produced considerably in advance of frontal margin and generally 
armed with strong teeth. 
Panulirus argus (Latreille). 
Palinu ru .' < argus Latreille, Ann. Mus. Hist. Nat. Paris, in, 393, 1804. 
Panulirus argus White, List Crust. Brit. Mus., 69, 1847. 
Orbital spines very large, strongly curved. Spines not very thickly placed on the carapace. 
Antennal segment with four spines,, anterior pair a little the larger and further from posterior than are 
the spines of either pair from each other. Exognath of second gnathopod with flagellum reaching quite 
to middle of third joint. Terminal joints of trunk feet furnished with bristles. Abdominal furrows 
rather indistinctly interrupted at middle. Epimera with entire anterior margins, posteriorly with a 
sharp tooth. Color, yellowish and bluish. Abdomen with many small, yellow spots; a large, yellow 
spot on either side of second and sixth segments. 
Length of Porto Rican specimen, measured from the anterior margin of the carapace to the tip of 
the telson, 42 cm. 
Porto Rico: San Antonio Bridge, San Juan; Mayaguez; Boqueron Bay; Arroyo; Hucares; Cabo 
Rojo; Mayaguez, in the market (Gundlach). From Bahamas and Florida Keys to Brazil; Bermudas. 
Tribe HO MAR IDEA. 
First antennse with two multiarticulate flagella; second antennse with a scale. Trunk-legs with 
seven distinct joints; the first three pairs chelate; the first pair largest. Branchiae well developed. 
Family HOMARIDT Bate, 1888. 
Carapace subcylindrical, with a pronounced rostrum. Second antennse with a long multiartic- 
ulate flagellum, and a scale. Segments of pleon dorsally imbricated; first segment with appendages. 
Outer branch of uropods with a transverse suture. Epipodal plates large, with a well-developed podo- 
braneliial plume attached to all the trunk-legs except the last pair. 
Genus HOMORISCUS , 1 nov. 
Rostrum depressed, short, and broad. Eyes small, but well developed. Antennal spine on 
anterior margin of carapace small. Antennal scale large. Second antennal segment with a spine. 
Thoracic feet unknown. In the character of the rostrum, this genus differs from all others of the 
Homaridse. The rostrum resembles that of Pulinurellm, In the small size of the eyes Homoriscus 
differs from Homarus, Nephrops, and Eunephrops , while. the black cornea distinguishes if from Nephmpm 
and Phoberus. It agrees with Neplirops and Phoberus in having a large antennal scale, it is, in fact, a 
near relation — a little neighbor — of Homarus. 
Homoriscus portoricensis, sp. nov. 
Carapace of female slightly compressed. Rostrum triangular, acute, sides slightly convex, finely 
and sharply granulated; upper surface concave. Carapace with seven sharp longitudinal crests; the 
median occupies posterior two-thirds of carapace; the submedian and supero-lateral crests begin at base 
1 From oixopoi, neighbor, and -c.cncos, diminutive suffix. By its form, the name Homoriscus suggests its affinity to Homarus. 
