94 SILURIDJ3. 



5. Rita manillensis. 



Arius manillensis, Cuv. ^- Val. xv. p. 93. 



D. 1/7. A. 17. P. 1/9. 

 The length of the head is two-ninths of the total (with the caudal) ; 

 head granulated above; occipital process ovate. Maxillary barbel 

 shorter than the head. Teeth on the palate in two separate ovate 

 patches. Dorsal spine serrated in front. ( Val.) 

 Manilla. 



b. Palate toothless. Ventral rays six : Akysina. 



37. ACROCHORDONICHTHYS. 



Acrocliordonichthys, Bleek. Prodr. Silur. p. 221. 



Adipose tin low ; a short dorsal with one spine and five soft rays ; 

 anal fin rather short. Barbels eight : those of the maxiUaries scarcely 

 dilated at the base. The upper jaw is rather longer than the lower ; 

 teeth viUiform, palate edentulous. Head depressed, covered with 

 soft skin above ; eyes small, below the skin ; the skin of the body 

 with tubercles longitudinally arranged. Gill-opening rather narrow, 

 not extending to above the base of the pectorals. Caudal not emar- 

 ginate ; pectorals horizontal ; ventrals with six rays. 



Java and Sumatra. 



1. Acrochordonichthys platycephalus. 

 Acrochordonichthys platycephalus, Sleeker, Prodr. Silur. p. 224, and 



Atl. Ichth. Sihir. p. 67. tab. 84. fig. 2. 



B. 6. D. 1/5. A. 9. P. 1/7. 



The median groove on the upper surface of the head extends on 

 to the base of the occipital process ; a single hollow on each side of 

 the hinder end of the fonticulus ; occipital process more than twice 

 as long as broad. The greatest width of the body is nearly one-fourth 

 of the total length. The maxillary barbels reach to the end of the 

 operculum. Sides with three round, distant yellow spots posteriorly. 



Sumatra. 

 a. Type of the species. Prom Dr. P. v. Bleeker's Collection. 



2. Acrochordonichthys melanogaster. 



Pimelodus melanogaster, Bkek. Nat. Tydschr. Nederl. Ind. vii. p. 89. 

 Acrochordoniclithys melanogaster. Bleek. Prodr. Silur. p. 225, and Atl. 

 Ichth. Silur. p. 67. tab. 84.'fig. 3'. 



D. 1/5. A. 9. P. 1/7. 



The median groove on the upper surface of the head extends on 

 to the base of the occipital process ; its hinder portion with a pair of 

 hoUows on each side ; occipital process not twice as long as broad. The 

 greatest width of the body is one-fourth of its length. The maxiUary 



