REVIEW OF THE PARROTFISHES 123 



posteriorly than in S. radians, and as S. ahilgaardi gets larger this 

 canine tooth becomes proportionately more so. The distance to 

 canine tooth from suture between upper dental plates is contained 

 from 1.9 to 2.3 times in distance between centers of posterior nostrils, 

 whereas in S. radians it is contained 2,5 to 3.0 times. The latter 

 does not have a wide white bar on caudal fin base. 



Our specimens are in lots from the following localities: Puerto Rico, 

 1 lot; Jamaica, 1; Barbados, 3; Haiti, 3; St. Thomas, 4; Cuba, 2; 

 Curacao, 1 ; Florida, 1 ; and West Indies, 3. I have also seen 1 speci- 

 men from Bermuda, loaned by the Chicago Natural History Museum, 

 and 27 lots from the Bahamas, loaned by Dr. Bohlke. 



Genus Calotomus Gilbert 



Calotomus Gilbert, Proc. U. S. Nat. Mus., vol. 13, p. 70, 1890 (genotype: C. 

 xenodon Gilbert). 



This group of fishes was listed by Weber and de Beaufort (Fishes of 

 the Indo-Australian Archipelago, vol. 8, p. 260, 1940) under the 

 generic name, Cryptotomus Cope. The genotype of Cryptotomus, C. 

 roseus, represents a distinct phyletic line. Weber and de Beaufort 

 give "Calliodon" Cuvier (Regne Animal, ed. 2, vol. 2, p. 266, 1829) 

 as a valid generic name, which it is not; Cuvier uses "Les Callidons," 

 as a common name only. 



This genus is characterized by having flexible dorsal spines, gill 

 membranes joined to isthmus without a free fold; anterior nasal 

 opening with a broad dermal cirrus; teeth coalesced into a plate in 

 both jaws and the internal edge usually serrated; externally on the 

 plates occur 2 to 8 rows (more on large adults) of obliquely arranged 

 imbricated pointed incisorlike teeth, 1 to 4 canines on midsides of 

 upper jaw, these hooked somewhat out and backward; beginning at 

 standard lengths of about 60 mm. short conical teeth may occur on 

 the inside sm-faces of the coalesced dental plate of upper jaw, these 

 teeth variously arranged and may be absent in large adults; no canines 

 on lower jaw; caudal fin truncate to concave in adults, the outer rays 

 may be elongate; gill rakers 2 to 4 + 1+7 to 13. 



KEY TO THE SPECIES OF THE GENUS CALOTOMUS 



la. Caudal fin truncate in young to concave in those longer than 100 mm. in 

 standard length and deeply concave in larger specimens; distal margin 

 of caudal fin broadly white edged; length of middle caudal fin rays 

 from Yi to equal to longest pectoral fin ray; plate 24,c. (Hawaiian 

 Islands, Central and West Pacific, Indian Ocean.; 



spinidens (Quoy and Gaimard) 



1&, Caudal fin rounded at all sizes; distal edge dusky, not white; length of 

 middle caudal fin rays equal in young to or longer than longest pectoral 

 fin ray; plate 24,d. (West Pacific, Indian Ocean.) 



japonicus (Cuvier and Valenciennes) 



396816—58 9 



