﻿COPEPOD GENUS PUPULINA (CALIGOIDA) — WILSON 257 



Male: Gulf of Mexico specimens: Total length, 5.7-6.1 mm.; width 

 of carapace, 2.2-2.5 mm. ; length of carapace, 2.3-2.8 mm. California 

 specimens : Total length, 4.8 mm. ; width of carapace, 2.0 mm. ; length 

 of carapace, 2.1 mm. 



Carapace suborbicular, longer than wide ; posterior sinuses shallow ; 

 thoracic area somewhat elongated and narrowed behind the sinuses. 

 Pattern of cephalic area not distinct in specimens available, except 

 for two anterior ridges, between which are a pair of rather stout 

 spines; another pair of spines located a short distance posterior to 

 the eyes; these spines apparently easily broken off, as in no single 

 specimen are they all intact. 



Free segment about two and one-half times wider than long, with 

 long dorsal hairs posteriorly. Distal corners of genital segment 

 hardly produced. Abdomen about as long as genital segment, 

 2-segmented, set marginally and dorsally with fine spinules. Caudal 

 rami one-fourth longer than abdomen, attached laterally as in female, 

 but not divergent; not twisted and flattened laterally to such an 

 extent as those of P. fiores. but with similar long hairs inside. Caudal 

 setae as in female. 



Prehensile lateral hook hardly stouter than that of female, setae 

 of papillae unbranched. Second antenna (pi. 13, fig. 15) compara- 

 tively stout; basal segment well differentiated from ventral surface, 

 second segment armed with a large, ridged lamina and a stout spine ; 

 the third wath a 2-layered lamina, a spine and a seta, both of which 

 arise from large stalks; claw short but strongly curved. 



First maxilla (pi. 13, fig. 10) with inner piece elongated distally 

 as in female, but bearing at outer distal third a stout recurved spine ; 

 basal outer piece with distal outer lobe larger than in female and 

 extended slightly beyond the curved basal part of the inner piece; 

 papilla (pi. 13, fig. 12) with the three usual setae, the medial being 

 very slender. 



Maxilliped (pi. 13, fig. 14) with stout terminal claw, armed with 

 a seta on a long stalk; basal segment having a prominent process 

 similar to that of P. flores^ but more elongated. Anterior ventral 

 accessory process with smaller spine than in the female; posterior 

 process like that of female. 



Rod between legs 1 and 2 with posterior, upwardly directed lobes, 

 apparently unarmed. Legs 1-3 like female; leg 4 (pi. 13, fig. 16) like 

 female except that in addition to scattered spines, the basal segment 

 is set dorsally with very long slender hairs. 



Color. — MacGinitie (1947) has recorded the following notes on the 

 color of the California specimens : "The smaller of the two new species 

 of copepods had a wine-colored eyespot. The body and tail were trans- 

 parent, with wine and blue lines and patches over the body. The 



