Jordan and Evermann. — Fishes of JSTorth America. 763 



CI-. Dorsal fin large, of :!8 rajs, tlie first ray not in advance of vent; rings 14 4- 37. 



STARKSI, 1131. 



Off. Dorsal fin very short, its first ray not in advance of vent; rings 15 4-;t7 to 39; 

 snout very short, less than g head; angles of body little marked, the form sub- 

 terete. 

 r. Dorsal rays 20; rings 15 + 39; snout ly.^ in head. abctvm, 1132. 



rr. Dorsal rays 20; rings 15 + 38 or 39; snout 3 in head; body with dark cross 

 bands and pale spots. orinioerim, 1133. 



CoRYTHROiCHTHYS (Kopu8pos, crown; ix^t'S, fish): 

 na. Top of liead strongly carinated, keel usually extending from interorbital spate to first body 

 ring; body stout, usually with sharp angles and variegated coloration; head in line 

 with axis of body; opercle with a prominent ridge, 

 s. Caudal rings about 30; dorsal rays 23 to 27, snout short. 



I. Rings 18 + 30; dorsal rays 23, on 1 + 4 rings; snout 1\ in head, itc color white; body 

 with 12 irregular brown cross bands, and white markings. 



ALBIROSTRK, 1134. 



ss. Caudal rings 25, body rings 20; dorsal rays 40, on 3 + 7 rings; snout long, more than 

 half head; form of body undesoribed. cayennense, 1135. 



Subgenus DERMATOSTETHUS, Gill. 



1110. SIPHOSTOMA PUXCTIPIXNE (Gill). 



Head 8. D. 41 ; rings 19 + 39. Eye large. Body comparatively robust. 

 Snout moderate, a little longer than the rest of the head. Occiput with 

 a raised keel ; joint between the occiput and the first dorsal shield more 

 perfect than usual, so that the head can be placed at an angle with the 

 body. Greatest depth about equal to length of postorbital part of head. 

 Skin on breast and anterior ventral plates thin, showing the striation of 

 the bones. Tail twice as long as trunk. Brown ; dorsal fin speckled. 

 Length 12 inches. San Diego, known only from the original types, which 

 possibly are not distinct from S. griseolineatum . (punctiis, dotted; pinna, 

 tin.) 



DertnalostethiiK pmiclipinnis, GiLL, Proc. Ac. Nat. Sci. Phila., 1862, 283, San Diego, California. 

 Siphosloma pmiclipimie, Swain, Proc. U. S. Nat. Mus., 1882, 308; Jordan & Gilbert, Synopsis, 

 385, 1883. 



Subgenus SIPHOSTOMA. 



nil. SIPHOSTOMA CABINATUM, Gilbert. 



Rings 17 or 18 + 40 to 42. D. usually 43 or 44 (39 to 44) on 1 + 8i rings. 

 Snout very slender, compressed, its length IJ to 1^ times rest of head. 

 Eye 2-i-V in postorbital part of head. Head and trunk contained li to 

 1* in tail. Trunk 2k in tail. Closely related to Siphostoina caHforuienxe 

 and grincoUneatum, diftering in the very slender, sharply keeled snout, in 

 the height and sharpness of the body ridges, the upi)er and lateral faces 

 being all concave, and in the coloration. No ridge on opercle. Breast 

 and belly with a low median keel. Snout sharply keeled, the ridge ceas- 

 ing on interorbital space lo reap])ear on occiput ami first nuchal plate. 

 Lateral ridge interrupted immediately above the vent. Base of dorsal 

 equaling length of head, covering 91 rings, only the first of which is in 

 front of the vent ; pectorals short, i length of snout ; caudal pouch on 22 

 anal plates. Keels on body sharp and high, and the interspaces are 



