460 ME. p. W. iJASSETT-SMITH ON C-^Pr- 18, 



Nogagus erraiis ? Kr. Bidrag til Kundskab, 1863, p. 175, pi. x. 

 fig. 3. 

 „ braccatus Heller, Eeise d. Novara, 1865, p. 177, pi. xx. 



fig. 3. 

 „ angustulus Grerst. Arch. f. Natiirg. xx. pt. 1, 1854, 



p. 192. 

 „ validus Dana, Proc. Amer. Acad. Arts & Sc. ii. 1852, 

 p. 58. 

 Divisioif II. 



Nogagus elongatus Heller, Eeise d. Novara, 1865, p. 206, pi. xx. 

 fig. 5. 

 „ ccelehs Heller, op. cit. p. 208, pi. xx. fig. 4. 

 „ borealis Stp. & Liitk. Bidrag til Kundskab, 1861, 



p.387, pi. xi. fig. 21. 

 „ tenax Stp. & Liitk. op. cit. 1861, p. 388, pi. x. fig. 20. 

 „ hrevicaudatus M.-E. Hist. Nat. Crust, iii. 1840, p. 460. 

 „ gracilis Burm. Acta Acad. Caes.-Leop. vol. xvii. 



p. 284, pi. xxiii. fig. 1. 

 „ lunatus Stp. & Liitk. op. cit. 1861, p. 389, pi. ix. fig. 7. 



Q-. 12. Demoleus Heller. 



Carapace rounded. Frontal plates distinct. Anterior anteunse 

 two-jointed. The first free thoracic joints lobed laterally, second 

 without lobes, third prolonged backwards by two dorsal plates. 

 Genital segment elongated. Abdomen small. Caudal plates very 

 distinct. All four pairs of thoracic limbs biramose and bi- 

 articulate. 



(1) Demoleus paradoxus. $ d . 



Caligus paradoxus Otto, Acta Acad. Cses. Leop. 1828, vol. xiv. 

 p. 352, pi. xxii. fig. 5. 

 „ Nordm. Mikrog. Beitnige, 1832, p. 32. 

 „ Gerst. Arch, zur Naturg. 1853, xix. i. pi. iv. 

 fig. 1. 



„ productus'i Miiller, Entomostraca, 1785. 

 Nogagus grandis ? d , vide Heller, op. cit. p. 202. 

 Host : " Dog-fish." Mediterranean. 



G. 13. Dtsgamus Stp. & Liitk. 



Carapace large, rounded. Frontal lobes distinct. Anterior an- 

 tenntebiarticulate. Rostrum long; palp articulate. Fourth thoracic 

 joint free, Mithoiit dorsal plates. Genital segment obcordate. 

 Abdomen biarticulate, with small caudal plates. All four thoracic 

 limbs biramose and biarticulate. This genus was made by Steen- 

 strup from a male only ; but in the Coll. Brit. Mus. there are a 

 large number of specimens, some with external ovaries attached, 

 which I have examined and have no doubt of their identity : there- 

 fore the genus is allowed to stand. 





