PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 307 
Vent normal, immediately in front of the anal, without papilla. 
Air-bladder ens wanting. Pyloric ceca about 6, rather long. 
Bones all soft and flexible, as in Icosteus enigmaticus. The skin, how- 
ever, not thick and tough, as in the latter species, but thin and scaled. 
Coloration in spirits plain brown, lighter below; the skin somewhat 
punctulate. 
Measurements of typical example. 
RN aa apn en nine wigan Seley geese ce, - 7.5 inches 
PRES MIOUD ASO Ol CATIONS so cae wcrajn se See eee eran ecieenanouras 6.8 inches = 100 
ener SS etree eee AA eo See aS oo Sache SOR ee Se cla oainoe Hee eager 25 
aS Wa EU ee ia oe a 2 SNE Stems FUE See eel Sus AAS Le EY 9 
tS STL TERED!) sence keris pest ea eel oie ae ie te ae ae ow Se 20 
ILI CC BRCM Eeet ne 5 SiS 22. ot 5 tote ts cena waeee badaee shad weesencoe 5g 
nceronbitalGwadGhy senses SoS e262 Sa. Sicc ced See pete ysiaiwo aa nissitle oni Sue ye ae eee 54 
SP Me CoE AnEAMOMOROO GOLGAl.. --)ocj0 sod 2-2 250 Lie cains aa Faiba sion - wie ne sdpSewclacee 37 
etter MEM ILEMS TOOTS cnet oe etc ha owt ee eek 2 A, ORE 51 
Meipntordorsal ..-.2.-..-...--: PE Sasi Sd PSAs Se Se ee ARE AE ene 4 
Pa Ce EROS OU UO Alc 8 ae tT A ee A RE ed, oo cw see nese ssceee 50 
Bae DOI o sels ole sila oa /s. (a/c Sao ois nlc d)a'ucin ois Seid o o's SS mene need secciec 32 
Mere BCE VOLS REM Weems Cte Sone oth. oh de ewes. ee omoh aeee le ise 11 
Pee RCM EAI ERR, faenia 4A 2hss- Aot Jats Seem Soak lls SSL Ee Eg 8 
Number of fin rays: 
Dorsal aeemeci ioe oe bepaee Soke abn) ose Sls bee 28S fe Meche tase ia aseieees sans 39 
ANP a5 2 See See Renate Ae Bee OSS cB COCR es eS ee ene are rent eae eee 28 
SELES TE TU etl ia Pel A Es es 2 eee ne eee eee (ca) 120 
The single example of this species at present known was obtained in 
the market of San Francisco by Mr. W. G. W. Harford, with two of the 
original types of Icosteus wnigmaticus. It has been presented by the 
California Academy of Sciences, for whom it was originally obtained, to 
the United States National Museum. Its specific distinctness from Jcos- 
teus enigmaticus was first noticed by Mr. Lockington, and we have seen 
fit to name the species for him, in recognition of his important work in 
Californian ichthyology. 
‘The two species are called “deep-water fish” by the dealers. 
As before noticed, the relations of this genus are evidently with the 
associated genus Icosteus, but the two genera bear little resemblance to 
any form known to us. They will probably constitute a distinct family 
or subfamily, in the Trachinoid group. 
This family (Leosteide) may be defined as follows: 
Body oblong, compressed. Head moderate, unarmed; the suborbital 
without bony stay. Mouth terminal, little oblique; the premaxillary 
not protractile; the maxillary slender. Teeth minute, sharp, erect, in 
one series on the jaws only. No barbels. Gills 4, a slit behind the 
fourth. Gill-openings wide; the membranes free from the isthmus. 
Gill-rakers slender. Branchrostegals 7. 
Dorsal and anal fins long, without spines. Caudal fin, with many 
recurrent accessory rays, on a slender peduncle. Pectoral fins rounded, 
with the carpal bones slightly exserted. Ventral fins thoracic, I, 5, or 
I, 4. Vent normal, without anal papilla. Pseudobranchie present. 
