135 



strong, inner expansion of proximal joint not very prominent, and broadly rounded 

 at the end, with 5 subequal setse, none of which are spiniform. 



.!/"/, as usual, somewhat smaller than female, and having the urosome 

 distinctly 5-articulate. Anterior antennas very strongly built, with the 4th joint 

 bulhously inflated, and the terminal part claw-like. First pair of legs of exactly 

 the same structure as in the female. Inner ramus of 2nd pair, as in the female, 

 distinctly 3-articulate, only differing in having the apical setse shortened and spi- 

 niform. Last pair of legs with the distal joint more oblong in form, and armed 

 outside with 4 very strong spines, inner expansion of proximal joint very slight, 

 and provided with only 2 marginal setse. 



Colour yellowish, changing to a light chestnut-brown. 



Length of adult female 0.54 mm. 



Remarks. I think I am right in considering the present form to be 

 identical with that recorded by Philippi under the above name. The general form 

 of the body, at any rate, agrees fairly well with the rough figure given by Phi- 

 lippi. As stated above, Prof. Brady has confounded this form with Dactylopus 

 fli/nts of Glaus, only the female described being referable' to Claus's species, 

 whereas the male unquestionably belongs to the form here treated of. 



Occurrence. I have found this form occasionally in several localities off 

 both the south and west coasts of Norway, from the Christiania Fjord at least to 

 the Trondhjem Fjord. It occurs in moderate depths, ranging from 6 to 20 fa- 

 thoms, among algae and Hydroida. As is the case with the species of the genera 

 Axpi/Hxcus and Poreellidium, the animal has the power of applying its flat body 

 so firmly to any object that it can only with considerable difficulty be detached 

 when alive. On coming in contact with the surface of the water, it remains 

 floating upon it, like some other Copepoda, and may thus easily be picked up 

 from any freshly taken sample. 



Distribution. British Isles (Brady), Mediterranean at Naples (Philippi). 



Gen. 36. AmenOpWa, Boeck, 1865. 



(ii'i)rrir Ch<tr<ir1ws. Body flat, shield-like, recalling in general appearance 

 that found in the species of the genus Zaux: rostrum, however, obsolete. Eye 

 quite normal. Anterior antennse of the usual structure, 9-articulate, in male only 

 slightly dilated, though distinctly prehensile. Posterior antennas with the outer 



