Report of a Mission to Guam. iii 



Genus SIGANAS Forskal. 



312. Siganas marmorata (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. I 3 r. Scales minute. Branchi- 

 ostegals 5. Pseudobranchiae well developed. Body oval, strongly 

 compressed. Snout rather bkmt 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. Pecftorals yellow. 

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

 Hab. Western Pacific, Marianas. 



213. Sigatias 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. Perioral 1.25 into head, its base a little greater than diam- 

 eter of orbit. Color in spirits: Blue with 3'ellowish 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 shows in more or less hexagonal form. 

 Dorsal, caudal, anal and ventral dusky bluish. Pe(5torals yel- 

 lowish. Length of above specimen 13 inches. P'our small Teuthis 

 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 blue 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, 

 Juh' 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 g; V. i 3 i. Body oval and compressed. The dorsal and 



