798 



COMPENDIUM OF GENERIC DISTINCTIONS. 



Family. ERGASILID^. Body oval or pear-shaped. 

 Feet very small and branched. 



Genus. NICOTHOB. Antennae slender, many-jointed. In 

 female, thorax enlarged into two wing-shaped lobes. Feet 

 four pairs. 



Order. LERNEADA. Mouth for suction. Thorax not 

 jointed, all its organs very small. Males unlike females. 



Tribe. A NCHORA S TOMA CEJE. Females fixed to 

 prey by strong and hooked foot-jaws. Antennae one pair. 



Family. CHONDRACANTHAD^E. Foot appendages 

 large ; foot-jaws three pairs. 



Genus. CHONDRACANTHUS. Body covered with spines. 



Genus. LERNBNTOMA. Egg-tubes long, sometimes stout, 

 sometimes slender and twisting. 



Tribe. ANCHORACARPACEM.Twa long append- 

 ages from thorax, ending in sucking disc or knob. 



Family. LERNjEOPODADjE. Appendages united at 

 tip. 



Genus. ACTHBRBS. Body rounded ; head large ; egg-tubes 

 pear-shaped. 



Genus. LBRN.KOPODA. In female, body long and oval ; 

 head short and thick. Foot-jaws two pairs. Male divided 

 into two nearly equal portions. 



Family. ANCHOR EL LAD^E. Arm-shaped appendages 

 short and united from base. 



Genus. ANCHORELLA. Female, head at end of very long 

 neck. Foot-jaws three pairs; first and second large, third 

 very small. Egg-tubes moderate. Male very small. 



Tribe. ANCHORACERACEJE.emsAts attached to 

 prey by head, which is held by horns from hinder part. 



Family. PENELLADJE. Several pairs of small feet on 

 under surface of body, near head. 



Genus. LERN^ONEMA. Body long, slender, narrowed in 

 front and ending in swollen head, with two or three curved 

 appendages. Abdomen long ; ovaries long and slender. 



Genus. PBNBLLA. Body thick ; neck narrow ; egg-tubes 

 thread-like. 



Family. LERNJEOCERADjE. No feet or appendages 

 on under side of body. 



Genus. LBRN^EOCKRA. Body long and straight. Head 

 with horn-shaped appendages, simple, symmetrical. Ovaries 

 straight. 



Genus. LBRN.&A. Body twisted. Horn-shaped append- 

 ages branched. Ovaries twisted into round masses. 



Order. PYCNOGONIDES. Trunk of four segments, 

 a tubular joint at each end, that in front constituting the mouth. 

 Feet of male four pairs, of female five pairs; the last pair 

 adapted for bearing the eggs. Marine. 



Genus. PHOXICHILIDIUM. Feet very long; two antennae. 

 Pincers. 



Genus. PYCNOGONUM. Feet hardly longer than body. No 

 pincers. 



Order. XI PHOSURA. Shell thick, two-jointed ; the 

 junction transverse. Thoracic feet round mouth, abdominal 

 feet bearing branchiae. A long sharp appendage to hinder 

 shield, jointed to shield and covered with very thick skin. 



Genus. LIMULUS. Front shield rounded in front; hinder 

 angles sharp and pointed. Hinder shield irregularly hexag- 

 onal, with fixed teeth and movable spines alternating on the 

 sides. Eyes two, sessile, compound, on front shield. Hot 

 seas. 



CLASS ARACHNIDA. 



Animals breathing atmospheric air Antennae none 

 Legs four pairs, attached to foreparts of body. 



Order. ARANEIDEA. Not more than four breathing 

 hotes. Abdomen covered with skin. Head and thorax united. 

 Palpi of male swollen at last joint. 



Tribe. OCTONOCULINA .Eyes eight. 

 Family. MYGALID^E. Spinnerets four. Breathing 

 apertures four. Fakes bent downwards, curved. 



Genus. MVG ALB. Feet hairy, nearly equal, first and fourth 

 pairs largest. Exotic. 



Genus. ATVPUS. Eyes on a " watch-tower " in front of 

 cephalothorax. Fourth pair of legs longest. 



Genus. CTBNIZA. Mandible with a row of homy barbs on 

 outer side, near claw. Jamaica. 



Family. LYCOSID./E. Spinnerets three pairs. Fakes 

 jointed vertically. 



Genus. LYCOSA. Third pair of legs shortest. 



Genus. DOLOMBDKS. Fourth pair of legs usually longest, 

 third pair shortest. 



Family. SALTICID/E. Three pairs of spinnerets. Fakes 

 jointed vertically on an inclined plane. Two breathing apert- 

 ures in front of abdomen and on its lower surface. 



Genus. SALTICUS. Legs stout, variable in length. 



Genus. MYRMARACHNA. Head nearly distinct. Skin hard. 

 Abdomen swollen in middle. Bengal. 



Genus. ERBSUS. Four larger eyes in a square. Legs 

 moderate, nearly equal in length. 



Family. THOMISID^E. Three pairs of spinnerets. 

 Tarsi mostly two-clawed. 



Genus. THOMITSUS. Eyes in two rows, one in crescent on 

 part of a circle, with the convexity in front, nearly same size. 

 First and second pairs of legs longest. Lip blunt at tip. 



Genus. PHILODROMUS. Eyes in two transverse rows. Legs 

 long, variable. Lip triangular or oval. 



Genus. SPARASSUS. Eyes in two transverse rows, second 

 longer than first. Lip semicircular or oval. 



Family. DRASSID^E. Three pairs of spinnerets. Tarsi 

 with two claws and numerous papilla;, or three claws and no 

 papillae. 



Genus. DRASSUS. Eyes in two transverse rows, alike in 

 size. Lip long, oval, rounded at tip. 



Genus. CLUBIONA. Eyes as before, slightly different in 

 size. Lip rather oval or squared. 



Genus. CLOTHO. Two upper spinnerets long. Fakes 

 small and not toothed. Tongue triangular. North Africa. 



Genus. ARGYRONRBTA. Intermediate of front row of eyes 

 smallest. Lip long, triangular, wide at base, rounded at 

 point. First pair of legs longest. 



Family. CINIFLONID^E Fakes jointed vertically. 

 Spinnerets four pairs, lowest pair shortest. Three claws on 

 tarsi. 



Gemu. CINIFLO. Intermediate of both rows of ey_es sessile, 

 the pairs on sides placed on tubercle. Lip wide in middle. 

 First pair of legs longest, third shortest. 



Genus. ERGATIS. Two side pairs of eyes on a tubercle. Lip 

 large, triangular. First pair of legs longest, then second pair, 

 third shortest. 



Family. AGELENIDiE. Fakes jointed vertically on an 

 inclined plane. Spinnerets three pairs. 



Genus. AGELBNA. Eyes in two transverse curved rows, 

 with convexity directed backwards. Lip squared or oval. 

 Fourth pair of legs longest. 



Genus. TEGEN ARIA. Eyes in two transverse rows, front 

 row straight, hinder curved, convexity backwards. Lip squared, 

 notched or hollowed at tip. Legs slender, either first or fourth 

 pair longest. 



Genus. C^LOTKS. Each side pair of eyes on a tubercle . Lip 

 curved on sides, blunt at tip. Legs strong, fourth pair longest. 



Genus. THERIDION. Sometimes two side pairs of eyes close 

 together. First and second pairs of legs longest. 



Genus. LINYPHIA. Eyes, four middle placed in two rows 

 hinder pair more remote, two side pairs near each other. First 

 pair of legs longest. 



Genus. TETRAGNATHA. Eyes in two nearly parallel 

 straight rows, nearly equal in size. Legs long and slender. 



Family. EPEIRID^E. Jaw widened from base, forming 

 rounded flatfish plate. 



Genus. EPBIKA. Skin soft. 



Genus. GASTBROCANTHA. Skin hard and bony, covered 

 with spines, tubercles, and prominences of various shape. 

 Tropical countries. 



