454: Mr. C T. Regan on the 



Synopsis of the Species. 



I. Upper lip overlapping the lower at the corner of the mouth ; upper 

 labial fold, if present, very short ; lower labial fold short or of 

 moderate length. Dorsal tin? equal or the tirst larger than the 

 second ; first dorsal originating above or behind the posterior 

 end of the base of pelvics ; pelvic fins, in the males, witli their 

 postericr edges either united or contiguous at the base. {Scylio- 

 rhinus.) 



A. Anterior nasal valves well separated from each other and from 



the mouth, each with a cirrus ; anal fin ending below the middle 

 of second dorsal ; pelvic fins not united. 



1. First dorsal considerably larger than the second. 



Nasal cirri moderate, not reaching the mouth .... 1. africanus. 

 Nasal cirri long, extending to the mouth 2. pantherinus. 



2. First dorsal scarcely larger than the second ; nasal cirri short, 



projecting but little beyond the edges of the valves. 



3. stellaris. 



B. Anterior nasal valves well separated from each other and from 



the mouth, each with a ridge which does not project as a free 

 cirrus ; anal fin ending below the anterior part of second dorsal. 



1. First dorsal considerably larger than the second. 

 Mouth about twice as wide as long * ; base of first 



dorsal not or scarcely more than 4 its distance 

 from the second ; pelvic fins, in the males, 



united at tlie base 4. retifer. 



Mouth about 2i as wide as long ; base of first dorsal 



11 to 1§ in its distance from the second .... 5. rudis. 



2. First dorsal scarcely larger than the second ; pelvic fins, in the 



males, completely united 6. capemis, 



C Anterior nasal valves separated from each other by a very short 

 interspace and confluent with the upper lip ; no trace of cirri ; 

 anal fin ending below the origin of second dorsal ; pelvic fins, 

 in the males, united for nearly the entire length of their poste- 

 rior edges 7. canicula. 



II. Lower lip not overlapped by the upper ; labial folds absent or 

 vestigial. First dorsal fin considerably larger than the second, 

 originating above or a little in advance of the middle of the base 

 of pelvics ; origin of second dorsal above anterior part of anal ; 

 pelvic fins not united. Anterior nasal valves separate from each 

 other and from the mouth ; no cirri. Head broad, depressed ; 

 snout short, obtuse ; mouth wide ; stomach inflatable. ( Cephalo- 

 seyllimn.) 

 Pectoral fin e.xtending § to f of the distance from 

 its origin to that of the pelvics ; end of anal a 

 little before that of second dorsal 8. latieeps. 



* The length of the mouth is measured from the symphysis of the 

 lower jaw to a transverse lin€ hetween the corners of the mouth. 



