48 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Egg strings folded to form 3 strands. 



Male. — Body form as in figure 233. Total length 9 mm (based on 

 1 specimen). Greatest width 3.4 mm. No dorsal plates present. 

 Oral area as in female. First antenna as in female. Second antenna 

 (fig. 234) with clawlike tip. Penultimate segment with stout hooklike 

 spine at midpoint. Other oral appendages as in female. Maxilliped 

 (fig. 235) with long terminal claw opposed by 4 adhesive areas on 

 preceding segments. Legs 1-4 as in female except for modification 

 of last segment of endopod of leg 3 (fig. 236). Leg 5 single lobe 

 with 2 or 3 setae. In the only specimen I was able to observe one 

 leg was broken and the other was not clear. Leg 5 located along 

 margin of genital segment near midpoint. Leg 6 (fig. 237) located 

 near junction of abdomen and genital segment and composed of 

 a single lobe with 2 naked setae. 



Discussion. — Demoleus heptatus has been described and its synon- 

 ymy considered recently by Dollfus (1943). The male is poorly 

 knoAvn and has been elaborated here on the basis of a single 

 specimen. This parasite seems to be most common on sharks of the 

 genus Hexanchus. 



Wilson designates Nogagus grandis Steenstrup and Liitken as the 

 male. This has been shown to be the male of Phyllothyreus cornutus 

 Milne-Edwards. The true male is not well known and the single 

 specimen that I studied may be the first record of the true male of 

 this species. 



Demoleus latus Shiino, 1954 



Figures 238-242 

 Demoleus latus Shiino, 1954, p. 325. 



Specimens studied. — A single collection of 12 females from the 

 Discovery Collections, collected off Cape Trawler, July 8, 1927, 

 from Squalus acutiinnnis. 



Female. — This species has been well described and figured by 

 Shiino (1954). Except for the inclusion of a few details omitted in 

 the original description, I will only present a superficial overall 

 descripton here. 



Body form as in figure 238. Total length 9.2 mm. (based on an 

 average of 3 specimens). Greatest width 3.1 mm. (measured at 

 widest part of genital segment). Dorsal thoracic plates present on 

 segment 4. Genital segment about one-half body length. Abdomen 

 1 -segmented and with broad dorsal plate. Caudal ramus broad, 

 with 4 terminal naked setae. 



Oral area (fig. 239) and associated appendages well described by 

 Shiino except that it is worth noting that there is an adhesive pad 

 between the bases of the maxillipeds as in D. heptatus. 



