DEMOLEUS. 79 



Genus 9. DEMOLEUS Heller, 1865. 



Syn. Caligus Otto (not O. F. Mtiller). 



Carapace suborbicular, divided into three parts by 

 two longitudinal sutures, middle portion subquadrate, 

 lateral portions narrow, produced backwards into pro- 

 minent rounded lobes. Frontal plates distinct, with- 

 out lunulas. Eyes conspicuous, close together. First 

 and second free thoracic segments small; the next larger 

 and prolonged backwards so as to form small dorsal 

 plates in the female but which are wanting in the 

 male. Genital segment elongated in the female, sub- 

 quadrate in the male. Abdomen short, not jointed, 

 covered clorsally with a foliaceous lamina. Caudal 

 appendages large. 



1. Demoleus paradoxus (Otto). 

 (Plate XII, figs. 4, 5.) 



1828. Caligus paradoxus Otto. (93) p. 352, pi. xxii, fig. 5. 

 1861. Nogagus grandis Steenstrup & Lutken. (127) p. 386, pi. x, 

 fig. 19. 



1865. Demoleus paradoxus Heller. (58) p. 199, pi. 19, fig. 3. 



Female. — Carapace suborbicular and equal to about 

 a third of the entire length of the animal ; frontal 

 plates distinct, lunulas wanting, postero-lateral lobes 

 considerably produced behind. First and second free 

 thoracic segments small, and just filling the space 

 between the produced lateral lobes of the carapace ; 

 the first segment with, and the second segment with- 

 out, lateral processes. The next segment less than 

 half the width of the other two and furnished with 

 two small dorsal plates. Genital segment elongated, 

 length equal to fully twice the width, and divided 

 posteriorly by a deep median sinus into two lobes 

 which are rounded at the end. Abdomen very small, 

 triangular, not seen from the dorsal aspect. Caudal 

 rami large, extending beyond the end of the genital 

 segment and bearing a few minute spiniform setas. 



Antennules two-jointed, partly concealed by the 



