. Bulletin - United States National Museum. Science. ISOPODS OF NORTH AMERICA. 687 ''Telson: coxio ot),solete; posterior pleopoda (false feet) nearly uncovered; pedunch' (basis) somewhat triangular, broad; accessory lobe badly marked; accessory appendage inserted nearly on same line with ischium, flattened, rounded at the extremit\'; ischium long-, sub- ulate. Species, A. spiniger.''''â; ACANTHONISCUS SPINIGER White. Acanthoniscus spiniger ^V^ITE, List. Crust. Brit. Museum, 1847, p. 99.âGosse, A Naturalist's Sojourn in Jamaica, 1851, p. 65.âKinahan, Proc. Dublin Uni- versity, I, 1
. Bulletin - United States National Museum. Science. ISOPODS OF NORTH AMERICA. 687 ''Telson: coxio ot),solete; posterior pleopoda (false feet) nearly uncovered; pedunch' (basis) somewhat triangular, broad; accessory lobe badly marked; accessory appendage inserted nearly on same line with ischium, flattened, rounded at the extremit\'; ischium long-, sub- ulate. Species, A. spiniger.''''â; ACANTHONISCUS SPINIGER White. Acanthoniscus spiniger ^V^ITE, List. Crust. Brit. Museum, 1847, p. 99.âGosse, A Naturalist's Sojourn in Jamaica, 1851, p. 65.âKinahan, Proc. Dublin Uni- versity, I, 1859, p. 197, pi. XIX, fig. 4.âBuDDE-LuNi), Crust. Isop. Terrestria, 1885, pp. 241-242.âRichardson, Proc. U. S. Nat. Mus., XXIII, 1901, p. 569. Locality. âJamaica. " Body covered over with long spines arranged in a double longi- tudinal row, one spine to each ring. In cephalothorax a second row of shorter spines (two to each ring) on each side at junction of cox» and body. " Head covered with coarse knobs; two minute spines behind; a raised emarginate ridge marks out front. "Coxai of first cephalothoracic somite expanded into a circular lobe; coxaj of sec- ond to sixth somite narrow; seventh some- what quadrilateral. "â Abdominal somites: coxae, first and sec- ond, obsolete; third, fourth, and fifth, nar- row, curved, triangular. '' Telson cordato - panduriform: apex fi«- spiniger -,. , . . , (After Kinahan). a, Terminal deeply notched, its extrenuties triangular, segment of abdomen. fi,URopoD. produced, acuminate; sides of telson deeply incurved at base and then broadly convex. Posterior pleopods: acces- sory filament somewhat flattened; rounded at the extremity, about half length of ischium, and arising from a point distant from apex about a third of total length of peduncle. Ischium long and sul)ulate. Peduncle prolonged as a spine external to origin of ischium. Color: deep chocolate brown black, wnth lighter patches. ''Loca
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