184 MR. C. TATE REGAN ON THE 



teeth mostly conical, in 4 or 5 series in upper jaw, o or 4 in lower, 

 GO to 70 in outer series of upper jaw. 5 or 6 series of scales on 

 cheek. 7 to 9 gill-rakers on lower jiart of anterior arch. 33 to 

 36 scales in a longitudinal series, 8 to 10 from origin of dorsal to 

 lateral line. Dorsal XV-XVI 8-10 ; last spine g head. Anal 

 III 8-9 ; third spine |- head. Pectoral 4 head, not reaching anal. 

 Caudal rounded or subtruncate. Caudal peduncle 1| to 1^ as 

 long ao deep. Body with numerous small irregular dark spots. 

 Seven specimens, up to 200 mm. long. 



37. Haplochromis orthostoma, sp. n. (Text-fig. 9.) 



Pelmatochroinis spekii (part.) Bouleng. Cat. Afr. Fish. iii. 

 p. 417 (1915). 



Depth of body nearly equal to length of head, 2* in length of 

 fish. Head 2k as long as broad ; upper profile convex to above 

 anterior part of eye, thence straight. Snout longer than diameter 

 of eye, which is 5 in length of head, nearly equal to interorbital 

 width or prajorbital depth. Mouth very oblique ; maxillary not 

 quite reaching vei'tical from anterior edge of eye ; lower jaw 

 strongly projecting, more than k length of head ; teeth conical, 

 triserial, aborrt 60 in outer series of upper jaw. Cheek as deep 



Text-figure 9. 



Haplocliromis orthostoma, sp. ii. 



as long, with 4 or 5 series of scales. 9 gill-rakers oir lower pai-t of 

 anterior arch. Pharyngeal teeth slender. 33 scales in a longi- 

 tudinal series, 6 or 7 from origin of dorsal to lateral line. Dorsal 

 XV 9 ; last spine longest, | length of head. Anal III 8 ; third 

 spine stronger than and nearly as long as last dorsal. Pectoral 

 shorter than head, not reaching anal. Caudal rounded. Caudal 

 peduncle 1| as long as deep. Greyish ; a dark bar below anterior 

 part of eye ; pelvic fins blaclcish ; an ocellus on posterior part of 

 anal. 



A single specimen, 115 mm. in total length, from Lake 

 Salisbury. 



