Download Trewavas (1935) - The Cichlid Fishes of Lake Malawi ...

the Cichlid Fishes of Lake Nyasa.B. Lower pharyngeal toeth minute and numerous, denselycrowded, especially posteriorly.* Head 3 to 3) in length of fish; 11 to 13 gill-rakerson lower part of anterior arch.24. t~niolatus.** Head 3& to 33 in length of fish.8 13 to 15 gill-rakers on lower part of anterior arch.Depth of body 3 in the length; pectoral as longas head ; lower longitudinal stripe strong. 25. breviceps.Depth of body 29 to nearly 3 in the length;pectoral I+ to I$ as long as head; nostripes .............................. 26. microcephalus.$8 I4 to 17 gill-rakers on lower part of anterior arch ;depth of body 29 to 29 in the length ; depth ofprseorbital4 to 49 in length of head.27. nigritzniatw.$58 16 to 19 gill-rakers on lower part of anterior arch ;depth of body 24 to 3 in the length; depth ofprzorbital 46 to 6 in length of head.Interorbital width 3) to 3) in length of head ;46 to 64 teeth in outer series of upper jaw . 28. swenus.Interorbital width from nearly 4 to 44 in lengthgf head ; 66 to 72 teeth in outer series ofupper jaw. ........................... 29. purpumns.b. Lower pharyngeal with some or all of the middle teethenlarged and blunt.(i) Snout shorter than postorbital part of head.a. Head 3# to 3% in length of fish. 30. microstoma.8. Head from nearly 3 to 33 in length of fish.* Outer teeth bicuspid.Lower jaw 23 to nearly 3 in length of head . . 31. kirkii.Lower jaw 3 to 34 in length of head ........ 32. labridens.Lower jaw 3) in length of head ............ 33. virgatm.** Teeth conical ; lower jaw 2f in length of head.34. phenochilus.(ii) Snout as long as postorbital part of head ; head 28 inlength of fish (88 mm. specimen) ; outer teeth bicuspid,inner tricuspid ............ 35. festivw.E. A series of five spots at base of dorsal ; alternating with these,at least posteriorly, another series of spots on or above lateralline ; sometimes a third series ; spots often expanded vertically ;lips continuous, and produced at or near middle line.12 or 13 gill-rakers on lower part of anteriorarch ; posterior pharyngeal teeth withspherical crowns ...................... 36. omotw.16 gill-rakers on lower part of anterior arch ;posterior pharyngeal teeth large, but notspherical37. lobochilus.............................F. Two black longitudinal bands from head to caudal fin, one onmiddle of side, the other above upper lateral line and on upperedge of caudal peduncle; lips produced into median lobes ;tooth fow, outer compressed, 31) in uppor jaw; pharyngealteeth small ...................... 38. ruchil~m.6 *