Report of a J/iss/o/i to Cuam. iii 



Genus SIGANAS Forskal. 



212. Siganas tnarmorata (Quoy & Gaim.). 



Head 4.33; depth 2.33; eye 3.33, equal to maxillary; inter- 

 orbital 3.66; D. XIV 10; A. VII 9; V. 131. Scales minute. Branchi- 

 ostegals 5. Pseudobranchise well developed. Body oval, strongly 

 compressed. Snout rather blunt and rounded; upper jaw some- 

 what overhanging. Teeth: A single row of cutting incisors in each 

 jaw. Fins: Dorsal spines strong, the fourth the longest, its length 

 equal to distance from the first vertical spine. Caudal only slightly 

 forked, its longest ray equal to head; first ventral spine 1.33 into 

 head, reaching more than half-way to anal. Color in spirits: Brown 

 with wash of bluish; head and back covered all over with blue 

 vermiculated lines which are wavy and longitudinal on the sides. 

 Caudal, dorsal and anal with brownish lines. Peclorals yellow. 

 Two specimens. Length 3-7 inches. Agana, Guam, May, 1900, 

 Hab. Western Pacific, Marianas. 



213. Siganas hexagonata Giinth. 



Head 4; depth 2.20; eye 3.50; interorbital 3; D. xiv 10; 

 A. VII 9; V. I 3 I. Scales distinct but small. Body oval and com- 

 pressed; profile slightly convex. Maxillary equal to diameter of 

 orbit, 3.50 into head, its distance from orbit equal to its length. 

 Teeth: A single row of cutting incisors in each jaw. Branchi- 

 o.stegals 5. Pseudobranchiae well developed. Caudal peduncle 

 much compressed, its height 3 into head. Fins: Caudal deeply 

 forked, its upper lobe slightly the longest, 3.20 into length of body; 

 the depth of fork 1.50 into head. Soft dorsal and soft anal about 

 equal in height and length; the longest ray of dorsal is 1.66 into 

 head. PeCloral 1.25 into head, its base a little greater than diam- 

 eter of orbit. Color in spirits: Blue with yellowish spots about 

 one-half the diameter of pupil in size all over the body and head. 

 These golden spots have narrow margins of black, outside of which 

 the blue ground color show^s in more or less hexagonal form. 

 Dorsal, caudal, anal and ventral dusk}- bluish. Pecftorals yel- 

 lowish. Length of above specimen 13 inches. Four small Tciithis 

 length 4-5 inches, which I take to be the young of this species, 

 were captured at the same time. These show very indistinct hex- 

 agonal markings, and the general color is a much lighter l)lue with 

 from 8-12 round black dots, one-half the size of pupil, scattered 

 over the sides of the body. There is also a black opercular splotch 

 on the upper posterior margin of opercle. The caudal is deeply 

 forked. Head 4; depth 2.50; eye 3; interorbital 3. Agaiia, Guam, 

 July 12, 1900. Hab. Polynesia, Marianas. 



214-215. Siganas rostrata Cuv. & \'al. 



Head 4.50; depth 3; eye 3.25; interorbital 3.20; D. xiv 10; 

 A. VII 9; V. I 3 I. Body oval and compressed. The dorsal and 



