773 Bulletin ^7, United States National Museum. 



downward and backward from eye. Webt 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, (ci-iniyer, bear- 

 ing hair. ) 



Siphostoma crinigerum, Bean <fe Deesel, Proc. Biol. Soc. Wash., ii, 99, 1884, Pensacola; Swain 

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



Subgenus CORYTHROICHTHYS, Kaup. 



1134. SIPHOSTOMA ALBIROSTRE* (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, IJ in base of dorsal ; tail longer than rest of body, If in total 

 length. Color in spirits liglit 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, {alhiis, white ; rostrum, snout.) 



Corythroirhthys albirostris, Heckel, MS., Kaup, Lophobranchii, 25, 1856, Mexico; Bahia; des- 

 cription incorrect. 



Siphosioma zatropU, Jordan & Gilbert, Proc. U. S. Nat. Mus., 1882, 264, Snapper Banks, 

 Pensacola; Swain, I. c, 308; Jordan & Gilbert, Synopsis, 906, 1883. 



Syngiiathus albirostris, Gunther, Cat., viii, 170, 1870. 



1135. SIPHOSTOMA CATENNENSE (Sauvage). 



Head 5. 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, Siphosloma zairopis. The following is the 

 substance of Kaup's description: 



Corylhroichlhys 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 helong 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 Steindaohner has kindly examined the types of Corythro- 

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

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



betragt) ^~. „^ -l-2G — 28, und zwar 2 mal 19, 1 nial 18 + 2 mal 28." lu the number of plates this 

 agrees with the type of ~atropis. There is little doubt that Siphosloma zairopis and S. albirostris are 

 identical. 



