16 k Canadian Arctic Expedition, 1913-18 



13. Metridia lucens Boeck, 1864. 

 I have only one record of this species in the collection: one male, 2 mm. 

 long, at station 13g, h, 54° 30' N., 159° 42' W., July 1, 1913, at the surface. It 

 has been reported very common, summer and winter, in the San Diego region. ' 



14. Paralabidocera amphitrites McMurrich, 1916. 



Station 14. 54° 23' N., 164° 45' W., surface, 15 minutes, net number 3. 

 July 2, 1913. Two males in company with an ovigerous Harpacticus uniremis. 



Station 18. Table I; many young, but no adults, were taken here, and 

 again at station 19 (see under Acartia longiremis) . 



Station 21a, b, c. Table II, young and adults of both sexes. 



Station 21d, e, /. 68° 48' N., 165° 10' W., net number 3, three surface 

 hauls of 15 minutes each, temperature 45-5° F., August 16, 1913. 



Table XII (Sta. 2U, e,f). 



Centropages mcmurrichi V 1 



Eurytemora gracilis 9 1 



Eurytemora kerdmani cT 4 



Eurytemora herdmani 9 3 



Eurytemora johanseni cf 36 



Eurytemora johanseni 9 6 



Eurytemora johanseni 9 stage V 4 



Paralabidocera amphitrites 9 4 



Paralabidocera amphitrites 9 stage X 14 



Paralabidocera amphitrites 9 stage IV . 3 



Paralabidocera amphitrites t? 5 



Paralabidocera amphitrites d' stage ^' 6 



Paralabidocera amphitrites stage III 4 



Acartia (clausi-longiremis) cf 9 



100 



Professor McMurrich's material consisted of two females and one male, 

 collected by himself in September, 1912, from a patch of "brown water," about 

 3i miles off Amphitrite point, Vancouver island.^ They were sub-mature 

 specimens, not having achieved the final ecdysis, and whilst they exhibited 

 certain generic features, the specific characters were in part lacking. The missing 

 characters relate chiefly to the right anterior antenna of the male, the fifth pair 

 of legs of the male, and to the genital segment of both sexes. In the male, the 

 fifth feet undergo a remarkable transformation on the passage to maturity. 



The lateral cephalic hooks and the rostral processes are hke those of Pontella 

 and some species of Labidocera. Paralabidocera further agrees with the definition 

 of Labidocera in the absence of a rostral lens, in having the dorsal eyes contiguous 

 in the male, and in having less than seven teeth on the iQandible. It differs 

 from Labidocera and agrees with Pontella in having 24 joints in the anterior 

 antennae of the female, seven joints in the second maxilliped, and three joints in 

 the inner branch of the first feet. The abdomen is three-jointed in the female, 

 five-jointed in the adult male. The last segment of the thorax is distinct in the 

 female, but in the male its median part is suppressed in dorsal view, only the 

 lateral lobes having a joint-line, as in Labidocera kroyeri <? Giesbrecht. 



'C. O. Esterly: The Pelagic Copepoda of the San Diego Region. Univ. of California Publications, 

 Zoology, Vol. 2, No. 4, October 14, 1905, p. 177. 



y. P. McMurrich: op. cit. 1916, pp. 82-87, f. 8-14. 



