654 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
This genus contains, so far as known, a single species from the deep 
sea. 
ANALYSIS OF THE SPECIES OF SPINIVOMER. 
a. [Silvery; recognizable also from its smaller eye and deeper mandibles, greatest 
height of body at the branchial regions contained 52 times in total length; rays 
ensheathed in a tough membrane.] (Gill <$r Ryder) Goodei, 104. 
104. SPINIVOMER GOODEI. 
Spinivomer goodei Gill & Ryder, Proc. U. S. Nat. Mus., 261, 1883 (Atlantic). 
Habitat : Atlantic Ocean (lat. 38° 19' 26", long. 68° 20' 20"). 
> Etymology : Named for G-eorge Brown Goode. 
This species was taken by the Albatross in the Atlantic. 
Genus 36.— OYEMA. 
Cyema Gunther, Ann. & Mag. Nat. Hist, li, 251, 1878 ( atrum ). 
Type: Cyema atrum Gunther. 
Etymology: Ku-gpa. 
The name Cyema is based on a single species apparently allied to 
NemichtJiys and still more closely to Avocettina , from which it differs in 
the more posterior position of the vent, in the form of the tail, which is 
not surrounded by a fin, and especially in the very small, inferior gill- 
slits. The peculiar soft band-like form of the body in Cyema atrum is 
probably not characteristic of the species when adult, the type being 
probably in a larval or leptocephalous stage. 
ANALYSIS OF THE SPECIES OF CYEMA. 
a. [Dorsal fin commencing nearly opposite the vent; body compressed, soft, and 
short; the depth contained 12 times in the body, the head not included; eye 
minute; upper jaw tapering into a very long, slender beak; teeth on jaws in 
broad bands; gill-openings very small, close together at the lower surface of the 
body, immediately in front of base of pectorals, at some distance from angle of 
lower jaw; vent midway between angle of mouth and end of tail; dorsal com- 
mencing nearly over vent ; pectoral fin well developed, its distance from eye §- of 
that from vent. Coloration uniform black.] ( Giinther ) Atrum, 105. 
105. CYEMA ATRUM. 
Cyema atrum Gunther, Ann. & Mag. Nat. Hist., ii, 251, 1887; Gunther, Voy. Chal- 
lenger, xxii, 565, pi. liv, fig. D (South Pacific, 1500 fathoms ; Antarctic 
Ocean, 1800 fathoms); Vaillant, Exp6d. Travailleur et Talisman, 91, pi. 
8, fig. 4, 1888 (coast of Morocco). 
Habitat : Atlantic and Pacific in deep water. 
Etymology : Latin, ater , black. 
This singular fish is known only from the accounts given by Gunther 
and Vaillant. It seems probable that its peculiar form is due to its 
imperfect development, and that it is a larval Nemichthyid. 
