MURPHY : REPORT OX TUK SOUTH GEORGIA EXPEDITION. Jl 
THE MALE OF PAX D ARCS SATYRUS DAXA 
By Charles B. Wilsox- 
Westi-iklu. Mass. 
Paxdarus satvrus Dana. 
I'aiidanis satyrus Dana, 1852, p. 1368; pi. 0=;, fig. 2, a to c. 
Fandarus satyrus Wilson, 1907, p. 415; pi. 31. 
Host and Record of Specimens. Fifteen females with 
egg- strings and two males were obtained from the pectoral fins 
of a large shark in the Atlantic Ocean, Lat. 6° 40" N., Long. 
24^ 35" \W., Oct. 9, 1912, by Roliert Ctishman Murphy. The 
male of this species has never before been obtained, and hence 
a complete description of it is here given. 
Specific Characters of ]\Iale. Carapace one-fifth 
wider than long, including the posterior lobes; lateral margins 
strongly convex; frontal plates considerably widened toward 
the outer ends, and entirely covering the basal joints of the 
first antennae; posterior lobes wide, triangular, very bluntly 
rounded, and curved inward at the tips, which reach the 
posterior margin of the third thorax segment ; grooves separa- 
ting" the cephalic and lateral areas shallow and indistinct; 
po.sterior margin straight: eyes invisil^le in the mature adult. 
The three free thorax segments together only three-fifths as 
long as the carapace, the second segment slightlv wider than 
the third and fourth, which are about equal, the fourth seg- 
ment the longest, its sides roundly pointed, and its posterior 
margin overlapping the genital segment. The latter is wider 
than long, spindle-shaped, with a pair of lateral and a pair of 
posterior lobes ; it is not narrowed into a neck anteriorlv where 
it joins the fourth segment, as is the case in Fandarus cranchii. 
The lateral lobes are small and triangular, and are armed 
with a larger terminal spine and several smaller ones along 
the inner margin. The ])Osterior lobes are much larg-er. 
triangular, tapered to an acuminate point, and curved inward; 
the sixth legs are just inside the bases of these lol)es on the 
posterior margin of the segment. AlKlomen two-jointed, joints 
the same length, the l)asal one a trifle the wider; anal laminre 
