282 
ft 
toraa ml orodon GUNTHER, monotypic# 
Eye large# Jaws rather slender, month cleft slightly curved# Teeth in jaws 
uniserial, slender, curved, acute, unequal, none very large; maxillary with 
small oblique teeth; teeth on palatines and pharyngeals; teeth on gill arches# 
Fold of skin connecting branches of lower jaw behind symphysis# ^elow eye large 
mass of luminous tissue, forming cushion on each side of roof of palate, appear- 
ing externally as long white patch with smaller luminous patch above anterior 
end; postocular luminous organ small, behind posterior end of lower subocular 
patch# Dorsal rays 21 to 24# Anal rays 25 to 27, origin below dorsal origin, 
ending little farther back than dorsal# Pectoral rays 5 to 6# Ventral rays 7, 
little postmedian# 
ANALYSIS OF SPECIES 
* 
Teeth short; close set series of 5 teeth on each palatine, last longest, 
microdon # 
Teeth longer; 2 teeth on each palatine, posterior longer 
atlanticus. 
Pachystomia s micr odon (Gunther) 
»! 
Ech iostoma microdo n GIRJTHER, Ann# Mag# Nat# Hist*, series 5, vol#2, August 1878, 
p#180* Off north west coast of Australia, in 2440 fathoms# - MACLEAY, Proc# 
Linn# Soc. New South Wales, vol#6, 1881, p#227 (copied). 
Pachystomi as m icrodon GUNTHER, Rep# Voy# Chnllenger, vol#22, 1887, p.210, pi.53, 
fig# C (type)# - GOODE and BEAN, Oceanic Ichth*, 1895, p.lll (reference)# - 
PARR, Bull# Binghajp Oceanogr# collection, \r 0 l # 3, art#2, December 30, 1927, 
i 
p.104 (compiled). - REGAN and TREWAVAS, Danish Dana Exped# Oceanogr. Rep#, 
