

108 F. Day — Monograph of Indian Cyprinidce, [No. 2, 



II. Genus, Mayoa, Bay. PL IX, f. 2. 

 Body anteriorly depressed, posteriorly compressed, snout rounded and 

 smooth. Barbels four, two on the snout and one at each angle of the 

 mouth. Eyes lateral. Mouth small, transverse, on the inferior surface of 

 the head, and surrounded by a large sucker, formed of both lips, which 

 are thick and have a free posterior edge. Pectorals and ventrals hori- 

 zontal. Borsal without an osseous ray, and commencing somewhat in 

 advance of the ventrals. Pharyngeal teeth hooked, in three rows, 5, 3, 1-1, 

 3, 5. Scales of moderate size, none on the thorax. Lateral line con- 

 tinued direct to the centre of the base of the caudal fin. 



Synopsis of Species. 

 1. Mayoa modesta, D. a, A. a, L. 1. 35. Habitat : probably North- 

 ern India. 



1. Mayoa modesta. 



Bay, Pro. Zool. Soc. 1869, p. 553. 



B. III. D. i P. 15, Y. 9, A. a C. 19, L 1. 35, L. tr. 4£-4j. 



Length of head nearly |, of caudal a, height of body T 2 T of the 

 total length. 



Eyes — directed laterally upwards and outwards, placed near the 

 upper surface of the head. Diameter £ of length of head, If dia- 

 meters from end of snout, 2 diameters apart. 



Head broad depressed, somewhat spatulate and rounded, as is 

 also the snout. No pores on the head. Lower surface of head and 

 chest flat. The snout overhangs the mouth, which is rather small, 

 transverse, and nearly semilunar in shape. Mouth with an ad- 

 hesive sucker, formed by both lips, and having a free margin, it is 

 extended some distance posterior to the lower jaw as in the genus 

 Biscognathus, from which it essentially differs in that the sucker is 

 completed by the upper lip, so as entirely surrounding the opening 

 of the mouth. The lips are reflected from off both jaws and with a 

 tuberculated surface : margin of upper lip fimbriated. Four bar- 

 bels, one rostral and one maxillary pair, all being rather thick and 

 short. Gill opening narrow. 



Teeth — pharyngeal, uncinate, 5, 3, 1-1, 3, 5. 



Fins. — Pectorals and ventrals horizontal, the former extending to 

 the latter, which reaches the anal. First outer pectoral ray simple, 



