18 POLTPTERID^. — DIPNEUSTI. 



1. CALAMICHTHYS OALABARIDUS. 



Erpetoiclithjs ealaharicus, J. A. Smith, Proc. Phys. Soc. Edinb. 1865, p. 278. 



CalamoicIdJiT/s ralabaricKs, J. A. Smith, Proc. K. Soc. Ediub. v. 1866, p. Gij^, and Tr. 

 P. Soc. Edinb. xxiv. 1866, p. 457, pis. xxxi. & xxxii. ; A. Dum. Hist. Poiss. ii. 

 p. .",D7, pi. xxiv. fig. 1 (1870) ; Gunth. Cat. Fish. viii. p. 328 (1870) ; Traquair, 

 Journ. Gool. Soc. Ireland, (2) ii. 1871, p. 249 : Clemens, Anat. Ilefte, v. i. 

 181)4, p. 16, pi. ix. figs. 7 & 8 ; Bouleng. Poiss. Bass. Congo, p. 27 (1901), and 

 Proc. Zool. Soc. 1901, i. p. 4 ; Werner, Zool. Jahrb., Syst. xxi. 1904, p. 272. 



Head small, feebly depressed, 1| to 2 times as long as broad, its length 

 11 to 14 times in total length ; snout projecting a little beyond lower 

 jaw ; eye lateral, 7J to 8J times in length of head, twice in interorbital 

 width. Dorsal with VII-XIII widely separated short spines. Anal 



Fior. 13. 







^^S^i-iiiii^r-ii^. 



m 



Calamichthi/s calahcificus. 

 Niger Delta. §. 



9-14. lOG-114 scales in a longitudinal scries, 30-34 round middle of 

 body. Uniform olive-brown above, yellowish beneath ; a large blackish 

 spot on the pectoral fin. 



Total length 370 millim. 



Niger Delta, Old Calabar, Cameroon, Cliiloango. — The types do not 

 appear to have been preserved. 



1-2. Ad. Niger Delta. A. :\Iillson, Esq. (P.). 



3. Ad., skel. 



4. Ad. Sapelle, Niger Delta. Dr. W. J. Ansorge (C). 

 .',-(*,. Ad. Creektown, Old Cal:il);ir. Pev. A. Robb (C). 



7-10. Ad. & hgr. Cameroon. D. (J. Hutheriord, Esq. (C.). 



11. Ad. Mouth of Cliiloango. H. J. Duggan, Esq. (C). 



12-13. Ad. West Africa. 



Order II. DIPNEUSTI. 



Paired fins lobatc, or reduced to an endoskclctal axis. Upper segment 

 of the mandibular arch confluent with the skull (autostylic skull) ; no 

 supraoccipital bone ; splenial present. Bulb of aorta muscular, with 

 several rows of valves. Lungs present. 



