NO. 3653 COPEPODS—CRESSEY 7 
segment 1 segment 2 
no. no. 
percent spines percent spines 
total and total and 
length length setae length length setae 
copepodid 266u 66 14 136 34 5 
chalimus I 342u 68 23 165y 32 12 
chalimus IT 413u 64 27 236u 36 14 
chalimus III A72u 61 27 307 uy 39 14 
adult 53lp 58 27 378yu 42 14 
ADULT, FEMALE.—Body form as in figure 27. For a complete 
description of the female of this species, see Cressey (1967a). 
Remarks.—The description of the copepodid instar of this species 
is the first to be linked conclusively to a known species of pandarid 
copepod. Similar forms have been described as the males of the genus 
Nesippus (Dana, 1852; Steenstrup and Liitken, 1861; Beneden, 1892; 
Gnanamuthu, 1949; and Hewitt, 1967). This description substantiates 
my previous remarks regarding these Nesippus males (1967a, p. 59). 
Since no forms intermediate between chalimus III and the adult male 
were found, it is assumed that there are only three chalimus stages. 
A few immature females were collected but not enough to determine 
their stage of development. Description of these forms has been de- 
ferred until more material can be collected. 
The copepodids were found either on the body surface of the host 
or within the gill chamber, usually just inside the gill slit. The chalimus 
stages and adults all were found within the gill chamber but not 
usually on the filaments themselves. Most often these forms were 
found near the tips of the filaments, firmly attached to the epidermis. 
The females often cause the tissue to swell, almost covering the 
cephalon. Males were not observed to produce this host reaction. 
This parasite is not restricted to Zsurus but also is found commonly 
on other lamnid sharks and Prionace glauca. 
Dinemoura latifolia (Steenstrup and Liitken) 
FiGuRES 26-27 
Dinematura latifolia—Lewis, 1966, p. 102.—Hewitt, 1967, p. 195. 
For earlier synonymy, see Cressey, 1967a, p. 42. 
Marteriau.—Three collections in the western North Atlantic (two 
previously reported by Cressey, 1967a) ; one collection from the Carib- 
bean Sea, 13°38’N, 75°50’W;; five collections from the Indian Ocean, 
previously reported by Cressey (1967b); eight collections from off the 
western coast of South America, R. V. Anton Bruun, Stations 553, 
554, 564, and 567); one collection from the central Pacific, vicinity 
of Christmas Island. 
