COMPENDIUM OF GENERIC WSTf.YCTIOXS'. 



639 



Family, CERMATIIDS:.— Eight dorsal shields, each covering 

 two ventral segments. 



Genus, Cerm.vtia. — Eyes prominent. Head transverse. 

 Dorsal shields scooped. Hot countries. 



Tribe. SOLO TARSIA.— Tarsi mostly tree-jointed, rarely 

 twelve-jointed. Head of two segments. Antennae not larger 

 than body. Eyes aggregate, simple, or wanting. 



Family. LITHOBIIDiE.— Fifteeirdorsal shields, squared, with 

 long, sharp angles. 



Genus. Lithobius. — Eyes numerous. 



Family. SCOLOPENDRID.?E.— Foot-bearing segments, twen- 

 ty-one or twenty-three. Hinder feet thickened, first or second 

 joint spined. 



Genua. ScoLOPENDRA. — Head heart-shaped, overlapping. 

 Four pairs of eyes. 



Genus. Encorybas. — Antennae nineteen-jointed; twenty-one 

 pairs of feet, last largest, and developed into leaping plates. 

 South Africa. 



Family. GEOPHILIDiE. — Segments nearly equal, numerous, 

 each formed of two unequal segments. Last segment with 

 short, spiny feet. Antennae fourteen joints. 



Genus. Arthronomalus. — Head squared. 



Genus. Gonihreguatus. — Head heart-shaped. Philippines. 



Order. CHI LOGNATHA.- Head vertical, rounded. Mandi- 

 bles thick and strong. Numerous segments, unequal. Feet 

 jointed to abdomen. 



Tribe. PENTAZONIA.— Body oval, contracted at globe, 

 mostly convex above and flat below. Feet fixed to free move- 

 able plates. 



Family. GLOMERIDJE.— Body smooth. Eyes distinct. 



Genus. Zepiironia. — Eyes numerous, aggregated. Antenna? 

 club-shaped, six or seven-jointed. Twenty-one pairs of feet. 

 Tropical countries. 



Genus. Glomeris. — Eyes eight, in a curved line. Thirteen 

 segments, seventeen pairs of feet. 



Tribe. MONOZONIA.—Body long and worm-like. First 

 half of each segment cylindric, second half with widened sides. 

 On each segment a double plate carrying two pairs of feet. 



Family. POLYXENID.S:.— Head arched and prominent; body 

 wide. Long tuft at end of abdomen. 



Genus. Poi.yxenus. — Body short, covered with minute pen- 

 cils of scales. Thirteen pairs of feet. 



Family. POLYDESMID.E.— Eyes none, or obscure. 



Genus. Poi.ydembs. — Body fiattish, rather convex, with 

 horizontal plates at sides. 



Tribe. BIZONIA. — Body cylindric, no plates on sides. An- 

 tennae club-shaped, seven-jointed. Many segments, each 

 formed of two fused segments, and bearing two pairs of legs. 



Family. JTJLIDiE. — Feet fixed to immoveable plates. 



Genus. Joxus. — Head convex. Antenna? long. Sides of pro- 

 thorax triangular. 



Genus. Spirostreptes. — Antenna? short, with funnel-shaped 

 joints. Eyes transverse. Sides of prothorax lengthened or 

 widened. Asia. 



CLASS-ANNELIDA. 



Elongated — No jointed feet, often with bristles or 

 tubercles for progression — Respiration by gills, sacs 

 or skin. 



Order. SETIG ERA. —Body with bristles or bristle-bearing 

 rudiments of feet. 



Family. AMPHITRITJE.— Head not distinct. Eyes none. 

 Body mostlv in a tube. 



Genus. Sabella. — Mouth transverse, across gills. Gills two, 

 feathery; funnel eomb-shaped, spiral, and large. Cylindrical 

 stopper. Front tubercles with hooks and bristles. Tube gelat- 

 inous, covered with sand. 



Genus. Serpdxa. — Gills two, combed, fan-shaped. Tube not 

 erect, calcareous, twisted. 



Genus. Terereli.a.— Upper lip surrounded by long tenta- 

 cles. Tubercles with double row of hooks. Gills branching. 

 Tube composed of sand and shells. 



Family. NEREIDJE.— Body long, .slender; head distinct, with 

 tentacles and eyes. Gills like lobes of feet. Tubercles through 

 out all body. Proboscis large, often with two horny jaws. No 

 tube. 



Genus. Phyli.odoce.— Head small. Eyes two; tentacles 

 four or rive, the last very minute. Jaws none; proboscis thick 

 and tentacled. Two bristles at end of body. 



Genus. Nereis. — Eyes four; tentacles four, short. Jaws 

 powerful; proboscis thick and cylindrical. 



Family. EUNICEiE. -Body long, many segments. Probos- 

 cis with seven to nine horny jaws. 



Genus. Eunice. — Head distinct, tentacles five. Comb-like 

 gills in front of body. Jaws seven. 



Family. ARICLE.— Head scarcely distinct. Body small at 

 each end. Proboscis short; jaws none. 



Genus. CiRRHATULLS. — Body long, round, a few bristles on 

 back and belly; cirrhi long. Gills like very long cirrhi in front 

 of body. 



Family. ARENICOLIDiE.— (Jills tufted in middle of body. 

 Double row of bristles along sides. Head not distinct; eyes 

 and jaws wanting. 



Genus. Arenicolv.— Segments divided by folds, thick in 

 front, smaller behind; no bristles behind last pair of gills. 

 Mouth with retractile proboscis. 



Family. CHLffiTOPTERID^;.— Front and hinder tubercles with 

 a bundle of bristles, but without hooks. Those of middle with 

 a large membranous appendage. 



Genus. Ch.etopterus. — Long, enclosed in leathery tube. 



Family. APHRODITIDffi.— Body oval. Head with tenta- 

 cles; eyes two or four. Flaps distinct, with spine and bristles. 



Genus. Aphrodite. — Head hidden under scales or bristles. 

 Eyes two; tentacles three. Jaws very small or wanting. Body 

 rather flattened. 



Family. LUMBRICIDiE.— Xo gills. Body with bristles, but 

 no tubercles. 



Genus. Lumbricus. — Nearly cylindric, narrow at both ends, 

 blunt behind. Mouth nearly at tip. Bristles not retractile. 

 Saddle composed of swollen rings in front of body. 



Order. SUCTORIA. — Body without bristles, with a sucking 

 disc at one or both ends. No external gills. 



Genus. HiRi'no. — Body oblong, rather Hat. Jaws three, 

 with double row of crowded teeth. Eyes ten. 



Genus. H.F.Moris. — Double row of few teeth. Ej'es ten. 



Genus. BranCHIOBdklla. — Body with large and few rings. 

 Eyes none. Jaws two, horny. 



Genus. Ai.eione. — Body narrowed in front, rings numerous. 

 Mouth small, narrowed at bottom of front sucker. Hinder 

 sucker at end of body. 



Order. TU RBELLARI A. — Body cylindrical or flattened, 

 mostly not joined, or wrinkled throughout, covered with cilia. 



Family. NEMERTIDJE.— Body very long, very contractile, 

 indistinctly ringed. 



Genus. Nemertes.— Several eyes; two pits at side of head, 

 surrounded by cilia. 



