Munroe and Ross: Distribution and life history of Citharichthys gymnorhmus and C. cornutus 
333 
A Males 
1 1 3 4 4 10 13 10 44 129 24 14 2 
15.5- 20.1- 25.1- 30.1- 35.1- 40.1- 45.1- 50.1- 55.1- 60.1- 65.1- 70.1- 75.1- 
20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 75.0 79.1 
Standard length (mm) 
Standard length (mm) 
Figure 6 
Size (standard length) and maturity information for 430 Citharichthys cornutus 
captured off the east coast of the United States and nearby regions. (A) Males 
(n = 259). (B) Females (rc = 171). Number above each column is the number of indi- 
viduals examined in that size range. 
(1934:153) examined seven specimens of C. cornutus (in- 
cluding types of Rhomboidichthys cornutus and several 
USNM specimens), noted sexual dimorphisms of this 
species, and also commented that a more complete de- 
scription of these dimorphic differences was available in 
Parr (1931). Longley and Hildebrand (1941:43) provided 
descriptive information on sexual dimorphism, as did 
Gutherz (1969), who also reported the capture of two 
adult hermaphroditic specimens from off Nicaragua. 
Longley and Hildebrand (1941) further commented that 
the sexes were easily distinguished at sizes of 55 mm 
(TL?) and greater because the posterior elongation of 
the ovaries was easily observed through the body wall 
of females. We also found that all females but one taken 
off the east coast of the United States that are >55 mm 
are sexually mature. 
Abundance 
Overall, the majority of specimens examined were taken 
on the outer continental shelf of the South Atlantic Bight. 
Ten different collections of C. cornutus from this region 
contained solitary individuals (Appendix 1), and another 
nine collections contained two or three specimens. The 
largest collections of C. cornutus from the east coast 
of the United States are all from North Carolina and 
southwards, including one collection off North Carolina 
with 12 specimens, seven off South Carolina (two with 
