LIST OF ILLUSTRATIONS. XI 



Labeo curriei 236 



Holopterura plumbea 240 



Tilapia savagei 243 



Syngnathus pellegrini 266 



Eutropius eclipsis 271 



Caranx angolensis 281 



Hybophanes nasutus. a, female. Lateral view of head, (e, epomia). b. male. 



Front view of clypeus 377 



Zagryphus nasutus. a, female. Lateral view of head, (e. epomia) 6, male, 



front view of clypeus. c. sheath of ovipositor. Lateral view 378 



Dimetrodon gigas, posterior aspect of skull. F., frontal; o., orbit; occ., occipi- 

 tal condyle; P., parietal; po., postorbital; P. oc, paraoccipital; po. /., 

 postfrontal; 5'., quadrate; g'. j. , quadra tojugal ; iSo., supraoccipital; ^Sg., squa- 

 mosal; ta., do\ibtful articulation for the tabulare 528 



Diometrodon gigas, occipital bones. A., external aspect; d., dermosupraocci- 

 pital; t., tabulare; B, internal aspect of concave articular surface of tab\i- 



lare 529 



Skull of Dimetrodon gigas Cope. Palatal view, bs, basisphenoid; /. St., facet 

 with which the stapes articulated; j, jugal; mx, maxillarj^; occ, occipital 

 condyle; pi., palatine; pmx., premaxillary; p. oc, paraoccipital process; 



pt. , pterygoid ; q. , quadrate; q. j. , quadratojugal 531 



Ribs of Di'inetrodon gigas. A, seventh rib of right side, viewed from the front; 

 B., sixteenth rib of left side viewed from the front; C, median cervical rib; 



c, capitulura; t., tuberculum 533 



Left scapula oi Diometrodon gigas. Lateral view, cf., coracoid foramen; cor., 



coracoid; mcor., metacoracoid 534 



Left humerus of Dimetrodon gigas. Anterior or ventral \dew. d., radial or del- 

 toid crest; ect. epg., ectepiconylar notch; ent. ep.f., en tepicondylar foramen; 



rad. c , radial condyle 535 



Left radius and ulna of Dimetrodon gigas. A., radius viewed from front; B., 



ulna viewed from front; 0., olecranon process 535 



Left fore foot of Dimetrodon gigas. C^, C-, centrale 1 and 2; /, intracarpal fora- 

 men; in., intermedium; ra., radiale; S., sesamoid; uL, ulnare; 1, 2, 3, 4, 



and 5 carpale; I to V, digits 537 



Neotetranychus uniunguis. Palpal appendages 647 



Schizotetranychus latitarsus. Tarsus and its appendages 648 



Tetranychu^ telarius. 1. Tarsal appendages. 2. Collar trachea; 3. Palpus and 



its appendages 651 



Tetranychu^ multidigituli. Palpal appendages 654 



Septanychv^ tumidus. 1. Mandibular plate; 2. Tarsal appendages; 3. Palpal 



"thumb " and its appendages 664 



Septanychus quinquenyckus. 1. Tarsal appendages; 2. Collar trachea; 3. Palpal 



"thumb " and its appendages 665 



Paratetranychu^ pratensis. 1. Tarsal appendages; 2. Palpal "thumb" audits 



appendages G69 



Paratetranychus modestus. 1. Tarsal appendages; 2. Mandibular plate; 3. Pal- 

 pal ' ' thumb " and its appendages 670 



Paratetranychus viridis. 1. Tarsal appendages; 2. Palpal " thumb " and its ap- 

 pendages 671 



Paratetranychus ilicis. 1. Tip of mandibular plate; 2. Penis and hind body 



margin; 3. Egg 674 



Paratetranychus bicolor. 1. Tarsal appendages; 2. Foreleg showing relative 



lengths of joints 675 



