1622 Bulletin 47, Ihiitcd States National IlJuseum. 



line before dorsal. Species numerous, of small size, mostly of dull or 

 olivaceous coloration. This genus is closely related to Sparisoma, differing 

 from it in having tlie anterior teeth nearly separate at all ages and in hav- 

 ing the dorsal spines llexible, as in /Scaj-Hs. The dentition approaches 

 that of a very young Sparisoma. This genus has been generally known as 

 Callyodon. The genus Calliodon of Gronow and of Bloch & Schneider was, 

 however , based on a species which apparently belongs to the genus Scarus. 

 The name was transferred by Cuvier from the type of Scams croiccnsis to 

 the present group. This transfer as inadmissible in our view, and the 

 name Calliodon should not be used for the genus. Callyodon, variaut 

 spelling of the same word, is also inadmissible. The name Cryptotomus 

 was proposed by Cope for a tish having the ''dentition of Callyodon, but 

 with the numerous dorsal and anal spines of the group of Harpe." The 

 fin rays are given D. XI, 8; A. Ill, 8. The numbers in all known species 

 of Scarbuv are D. IX, 10; A. Ill, 9 (8). We find on examination of the 

 original type of CryptotoniKS that Professor Cope has mistaken 2 of the 

 (broken) soft rays of the dorsal and 1 of the anal for spines. The differ- 

 ence between spines and soft rays in this group is very slight. We there- 

 fore regard Cryploiomiis as a synonym of Callyodon Cuvier, and the latter 

 name being ineligible, we adopt Cryptotomus as the name of the genus. 

 (Hpvrtrdi, hidden; rojuoi, cutting (teeth).) 



a. Posterior canine.s normally present (occasionally wanting on one side or both in some 

 species). 

 b. Lateral teeth of lower jaw arranged in a series continuous witli the anterior 



teeth, thus: 



c. Snout long and sharp, 2 in head, the protile somewhat unevenly convex; 

 upper lip double only posteriorly; posterior canines 2, strong, recurved. 



DENTIENS, 2032. 

 cc. Snout shortish, its length (measured along the axis) nearly 3 in head; pro- 

 file strongly convex above eye, thence nearly straight to tip of snout ; 

 posterior canine usually single, very strong. retractus, 2033. 



bb. Lateral teeth of lower jaw subequal, arranged in 2 rows which are not parallel, 

 the posterior teeth of the anterior series standing below and outside the 



anterior teeth of the posterior series, thus : 



d. Posterior canine usually preceded by 2 or 3 smaller ones ; upper lip double 



for its whole length. ustus, 2034. 



dd. Posterior canine usually single, sometimes wanting; teeth otherwise 



much as in C. ustus, the anterior canines smaller; upper lip not 



double for its whole length. auropunctatus, 2035. 



aa. Posterior canines none; lateral teeth in each jaw subequal, those of the lower jaw 



larger than those of the upper and forming a continuous series. 



e. Teeth of outer (anterior) series in upper jaw few, small, not caninelike, scarcely 



ditferent from the lateral teeth; lower jaw without enlarged teeth; upper 



lip double for its entire coiirse, the inner fold very narrow mesially , body 



moderately elongate, the depth 3i in length ; head SJ ; snout rather sharp, 



2J in head; profile gently curved, not steep; diameter of eye ii in head, IJ 



in its distance from the angle of the mouth; caudal subtruncate. Color 



olive gray, much mottled, sides with faint longitudinal whitish stripes ; 



head with some greenish spots; fins pale, mottled with olive. 



BERVLLINUS, 2036. 



