772 Bulletin 47, United States National Museum, 



downward and backward from eye. West Indies, from Pensacola and Key 

 West to Abrolhos Reef, Brazil; rather common southward about rocks and 

 coral reefs. One of the smallest species, length 3 inches, (criniger, bear- 

 ing hair.) 



Siphostoma crinigerum, BEAN & DRESEL, Proc. Biol. Soc. Wash., n, 99, 1884, Pensacola; SWAIN 

 & MEEK, Proc. U. S. Nat. Mus., 1884, 239. 



Subgenus CORYTHROICHTHYS, Kaup. 



1134. SIPHOSTOMA ALBIBOSTBE* (Heckel). 



Head 9 in total length. D. 23; rings 18 + 30. Body robust. Snout 

 short, 2f in head ; a strong median ridge above on snout, 2 ridges below 

 with a median groove, and on each side of the groove is a horizontal ridge 

 running to lower part of orbit. Occiput and nuchal plates very sharply 

 carinated; opercle with 2 horizontal ridges. Belly somewhat concave, 

 little keeled. Dorsal much shorter than head, covering 1 + 4 rings ; caudal 

 well developed, If in base of dorsal ; tail longer than rest of body, If in total 

 length. Color in spirits light olivaceous, with about 12 irregular brown 

 cross bands, each covering from 2 to 3 rings ; snout light, with 2 or 3 nar- 

 row cross bands below ; rest of head dusky. West Indies, north to Pen- 

 sacola and Key West, south to Bahia; a singular and handsome species, 

 quite unlike the others and found in deeper waters, and especially about 

 coral reefs, not on sandy shores, (albus, white; rostrum, snout.) 



Corythroichthys albirostris, HECKEL, MS., Kaup, Lophobranchii, 25, 1856, Mexico; Bahia; des- 

 cription incorrect. 



Siphostoma zatropis, JORDAN & GILBERT, Proc. U. S. Nat. Mus., 1882, 264, Snapper Banks, 

 Pensacola; SWAIN, 1. c., 308; JORDAN & GILBERT, Synopsis, 906, 1883. 



Syngnathus albirostris, GUNTHER, Cat., vin, 170, 1870. 



1135. SIPHOSTOMA CATENNENSE (Sauvage). 



Head5. D. 40; P. 18; C. 8. Rings 20 + 25. Dorsal on 3 + 7 rings. 

 Snout twice length of postocular part of head, 4 times diameter of eye, 

 much longer than dorsal. Occipital crest well marked as well as the crest 

 at the shoulder ; snout with a well-marked median carina. Brown, edge 

 of each ring blackish; 2 silvery streaks along flanks, very narrow, and 

 composed of small spots placed end to end. Length 5 inches. Cayenne. 



* Kaup gives the rings in albirostris as 12 + 29. On account of this difference we had formerly 

 regarded our specimens as types of a distinct species, Siphostoma zatropis. The following is the 

 substance of Kaup's description: 



Corythroichthys albirostris, HECKEL, MS.: 



P. 12; D. 27; A. 2 or 3; C. 10. Rostral crest - edial and interrupted. Body rings 12 (misprint 

 for 19), tail rings 29; dorsal fin standing on 5 rings, 4 of which belong to the tail. Snout half 

 the length of the distance between the fore border of the orbit and the base of the pectoral fin. 

 Color yellowish brown, with 14 blackish crossbars. Lower part of the gill cover brown with 

 blue stripes. Length of body 2.67 inches, of the tail 3.30 inches, of the dorsal fin 0.6 inch. 

 Mexico; Bahia. 



At our request, our friend, Dr. Franz Steindachner has kindly examined the types of Corythro- 

 ichthys albirostris. He writes (May 27, 1894): "Das Wiener Museum besitzt 3 Exemplaren von C. 

 albirostris; wahrscheinlich wurdel Exemplar an Kaup gesendet. Die Zahl der knocheruen Ringe 

 betragt~^ 6 + 2628, und zwar 2 mal 19, 1 mal 18 + 2 mal 28." In the number of plates this 

 agrees with the type of zalropis. There is little doubt that Siphostoma zatropis and S. albirostris are 



