1898.] Oy AEACHN-IDS FROM BRITISH EiST AmiCA. 497 



maxillary barbel as long as head. Vomeriue teeth in a narrow 

 band, without posterior process. 



Synodontis multipunctatus, sp. n. — Mandibular teeth in a single 

 series of 16, nearly straight, simple, measuring hardly 5 diameter 

 of eye ; depth of body 3j in total length ; snout rounded, twice as 

 long as eye ; maxillary barbel reaching a little beyond anterior 

 third of pectoral spine ; dorsal spine serrated behind ; adipose fin 

 a little shorter than the head, twice as long as its distance from 

 the dorsal ; humeral process sharply pointed. 



CyPEINODONTIDjE. 



HaplocJiilus tanganicanus, sp. n. — Body compressed, its depth 

 4 times in total length : D. 13 ; A. 26 ; Sq. 42 ; 1. tr. 11. 



Diagnoses of two new genera of Clchlidce were also added, based 

 on specimens forming part of a collection made in Tanganyika 

 by Capt. Descamps, of the Congo Free State : — 



EcTODUS, g. n. — Teeth very small, conical, in two series in both 

 jaws, the outer larger; outer mandibular teeth pointing outwards, 

 perpendicular to the others ; maxillary concealed under the prae- 

 orbital when the mouth is closed. Scales rather large, ctenoid. 



E. descampsii, sp. n.— D. XIV 14; A. ITI 8; Sq. 34 -^ ; 



I. lat. jg. Eye very large, 24 times in length of head. 



E. melanogenys, sp. n. — D. XIV 16; A. Ill 13. Eye 4 times 

 in length of head. 



Plecodus, g. n. — Teeth large and few, in a single series, dilated 

 at the base, truncated at the end, compressed, slightly grooved in 

 front, curved and directed backwards; 14 teeth in upper jaw, 

 12 in lower ; maxillary exposed. Scales moderate, cycloid. 



P. paradoxus, sp. n.— D. XIX 14; A. Ill 12; Sq. 65 ^ ; 



lat I 55 

 lax. 1. ^. 



The following papers were read : — 



1. On the Scorpions, Spiders, and Solpugas collected by 

 Mr. C. Steuart Betton in British East Africa. By 

 R. I. PococK, of the British Museum of Natural 

 History. 



[Received May 28, 1898.] 



(Plates XLI. & XLII.) 



On his return to England in the summer of 1897, Mr. Betton, 

 a member of the staff of engineers employed in the construction 

 of the railroad now in pi-ocess of being laid between Mombasa 

 and Lake Victoria, brought home a valuable series of zoological 

 specimens and generously presented them to the Trustees of the 

 British Museum. 



