166 MR. W. R. O. GRANT ON THE [Mar. 4, 



17. SiCYDiUM STiMPSONi, Gill. (Plate XII. fig. 4.) 

 Sicyopterus stimpsoni, Gill, Proc. Ac. Nat. Sc. Philad. 1860, 



p. 101 ; Bleeker, Arch. Neerl. ix. p. 313, 



Sicydium stimpsoni, Giinth. Cat. Fish. iii. p. 93 ; Giinth. Fische 

 der Siidsee, p. 183. 



D. 6l A.i. L.lat.70. 



Teeth in the upper jaw tricuspid. 



A row of rather large tuberculous papillae on the gum beneath 

 the upper lip, with a larger median papilla above the maxillary 

 suture ; upper lip with deep median cleft and two round lateral 

 notches below the nostrils ; maxillae at right angles to one another ; 

 horizontal teeth conspicuous. 



Head subquadrate, rather less than one fourth of the length of 

 the body (without the caudal) ; width of the head rather greater 

 than the height and two thirds of the length. The height of the 

 body is more than one fifth of the length. The length of the 

 pectoral is equal to the length of the head ; length of the caudal 

 greater. The diameter of the eye is one sixth of the length of the 

 head and one third of the interorbital space. Scales on the middle 

 of the trunk very large, much larger than those on the neck, belly, 

 anterior part of the body, and tail. The third and fourth dorsal 

 spines are produced into filaments ; the third which is the longest, is 

 more than twice the height of the body ; second dorsal not so high 

 as the body. Colour purplish, with from seven to ten darker cross 

 bands ; caudal and base of dorsal and anal white-dotted. 



The largest specimen measures 3g inches. 



Hub. Honolulu; Hawaii. 



Four adult and half-grown specimens (types of /S. nigrescens,]\i\.). 



18. Sicydium cynocephaltjm, C. & V. 



Gobio pinna ventrali subrotunda, ^c, Koelreuter, Nov. Comm. 

 Petrop. ix. p. 428, pi. 9. fig. 3, 4. 



Sicydium cymcephalum, Cuv. & Val. xii. p. 177, pi. 352 ; Bleeker, 

 Batjan. ii. p. 201 ; et Natuurk. Tydschr. Ned. Ind. 1859, p. 156 ; 

 Giinth. Cat. Fish. iii. p. 94. 



Sicydium lagocephalum (non Pall.), Bleeker, Natuurk. Tydschr. 

 Ned. Ind. i. p. 250. 



Sicydium parvei (non Bleek,), Giinth. Cat. Fish. iii. p. 94. 



Sicyopterus cynocephalus, Bleeker, Versl. Ak. Amst. (2) ix. p. 275. 



D. 6 J:_ A -i-- L. lat. 7.5-80. L. trans, ca. 17. 



Teeth in the upper jaw tricuspid. 



A row of small papillae on the gum beneath the upper lip, a 

 small median papilla above the maxillary suture ; upper lip with a 

 very slight median cleft ; maxillae contain an angle of about 60° ; 

 horizontal teeth conspicuous. 



The total length of the body (without the caudal) is four and a 

 half times the length of the head ; the width of the head is rather 



