812 FISHES OF INDIA. 



Raja rhinobatus, Gronov. ed. Gray, p. 10. 



Rhinohatus {Syrrhina) polyophthalmus, Bleeker, Japan, p. 129. 



Snout rather elongated : the distance between the outer angles of the nostrils equals 

 two-fifths of the extent preoral portion of the snout. Anterior nasal valve is con- 

 nected to a fold of skin passing towards the median line and so nearly joins that of the 

 opposite side. The upper vortral ridges are convergent in front. Back finely granular 

 with a medium row of small tubercles. Colours — brown, young examples have a 

 white snout. 



Habitat. — Mediterranean and the Indian and Atlantic Oceans. 



Page 745. Erase Genus Ceratoptera. 



Ceratoptera ehrenhergii. 



The figure must, I think, refer to an abnormal condition of Astrape dipterygia, as I find 

 such a form of monstrosity more common among European rays and skates than I had 

 formerly reason for supposing. 



Page 729. Add 



Sub-Class— LEPTOCARDII. 



Skeleton semicartilaginous and notochordal : destitute of jaws or ribs. Brain absent. Blood colourless 

 and distributed by pulsating sinuses. Respiratory and abdominal cavities confluent: numerous branchial 

 clefts and the water discharged by an opening in front of the vent. 



Family I.— CIREOSTOMI. 



An elongated compressed body, having a low and rayless dorsal fin, continued round the tail past the 

 vent to the respiratory opening. Mouth a longitudinal slit on the inferior surface, and with cirri. Eyes 

 rudimentary. Vent near the end of the tail. 



Genus 1 — Branchiostoma, Costa. 



AmpTiioxus, Tarrell. 

 Definition as in the family . 



One or more species of this genus are common around the waters of India, Burma, 

 Ceylon, and the Andaman Islands. 



