Thomson. — Oii Paratiitic Copepoda. 361 



very distinctly separated from the front portion by a narrow 

 constriction between the 2nd and 3rd thoracic segments. 

 Frontal lamina distinct, extending across more than half the 

 front of the carapace. The dorsal lamella3 of the penultimate 

 thoracic segment are square-shaped in front and rounded 

 behind. Under them the dorsal lamella? of the last thoracic 

 segment project to twice their length on their outer margins, 

 the inner being much shorter. The abdominal segments also 

 bear rounded lamellae, which are greatly developed and project 

 over the bases of the caudal lamelhe. The hind part of the 

 body is considerably inflated below. The abdomen is very 

 short, and nearly square in shape. Caudal lamellae very 

 similar in appearance to those of D. hamiltoni. 



Colour, nearly white. Length, 20-22mm. ; length of 

 oviferous tubes, about 50mm. 



Both pairs of antcnitce have a close resemblance to the 

 same organs in the preceding species. The foot-jaws are very 

 similar to those of D. liaiuiltoni, the terminal portion of the 

 2nd joint being however more contracted, and the secondary 

 spine jointed on to a short pedicel as in D. iieo-zealanica. 

 The feet are very similar in the number of joints, spines, and 

 setas to those of the first-named species, differing only in the 

 shape of the joints. In the first pair the 1st joint of the 

 outer branch is obliquely pyriform, and is marked on its outer 

 margin by three rudimentary division-lines. In the second 

 pair the 1st joint of the outer branch ends in a spine on its 

 outer margin. Those of the third pair exactly resemble those 

 of D. hamiltoni ; while in the fourth pair the only difference 

 lies in the form of the lamellae, which in this species are long 

 and narrow, and bear 1 minute spine on the inner margin of 

 the inner branch, and on the outer margin of the outer 

 branch. 



Hah. Numerous specimens (of females only) were taken 

 from the ventral surface of the tail of a white shark — Carcha- 

 rodon rondelctii, — and are preserved in the Otago Museum. 



This species is very nearly allied to, if not identical with, 

 D. lamnce, Johnston ; but the description and figure of that 

 species in Baird's "British Entomostraca," p. 206 (the only 

 accessible one to me), is imperfect and insufficient. 



Genus Echthrogaleus, Steenstrup and Liitken. 



1. Echthrogaleus iraccaiMS (" Eeise der * Novara:' Zool.," 

 vol. ii., p. 197 ; pi. xx., fig. 3). 



Dinematura braccata, Dana ("U.S. Expl. Exped. : 

 Crust.," vol. xi., p. 1370 ; pi. 95, fig. 4). 



The female of this species was originally described by 

 Dana. In ' ' The Voyage of the ' Novara ' " Heller describes and 



