126 Mr. C. T. Regan on the 



slender, without supramaxillary. No subocular shelf. Gill- 

 membranes free from the isthmus. Head flattish above, 

 with the occipital crest short and the parietal crests vestigial. 

 Vertebras 24 (10+14); prascaudals with parapophyses from 

 the third ; ribs, except the last pair, sessile, inserted behind 

 and above the parapophyses. 



Toxotes may be, in my opinion, rather closely related to 

 the Monodactylidse. 



Fam. 36. Scorpididse. 



Spinous dorsal well developed ; soft dorsal and anal 

 densely scaly ; 3 anal spines ; pelvics normally developed, 

 with scaly axillary processes, well behind the pectorals, 

 the pelvic bones elongate. Mouth moderately protractile, 

 normally formed ; maxillary more or less exposed distally, 

 without supramaxillary ; jaws with villiform or slightly 

 compressed and lanceolate teeth in bands ; teeth usually 

 present on vomer and palatines. A subocular shelf. 

 Vertebras 25 (10+15) ; prascaudals with parapophyses from 

 the third or fifth ; ribs, except the last pair, sessile, inserted 

 above and behind the parapophyses. 



In Scorpis the vertebras number 25 (10 + 15), the pras- 

 caudals with parapophyses from the third ; the strong 

 occipital and parietal crests end at a transverse ridge which 

 forms the posterior border of the frontals, which are rather 

 strongly elevated posteriorly. 



The skeleton of Medialuna is precisely similar to that of 

 Scorpis, and the two genera differ only in the dentition and 

 in the form of the spinous dorsal. Atypichthys is very near 

 Medialuna, but parapophyses commence on the fifth vertebra 

 and the frontals are less elevated posteriorly. Neatypus 

 and Atyposoma are the remaining genera of this family. 



Fam. 37. Cypliosidas. 



Differs from the preceding especially in the absence of a 

 subocular shelf and in the dentition, the jaws having an 

 outer series of strong incisors implanted by horizontal roots, 

 with a series of small villiform teeth behind them. Vertebras 

 26 (10 + 26); prascaudals with transverse processes from the 

 fourth ; ribs, except the last, sessile ; first epipleural 

 expanded, laminar. 



Genera : Cyphosus, Sectaior, Hermosilia. 



I have examined the skeleton of C. boscii, which is 

 extremely similar to that of Atypichthys. 



