COPEPODS OF THE WOODS HOLE REGION 495 



Male. — Head fused with the first two tlioracic segments and bear- 

 ing all the appendages except the caudal rami ; trunk with five dis- 

 tinct segments; caudal rami setiform. First antenna 3-segmented; 

 second antennae, second maxillae, and maxillipeds stout and pre- 

 hensile ; both pairs of legs uniramose, 1-segmented. A single species. 



ORALIEN TRIGLAE (Blainville) 



Figure 296, b, c 



Lementoma trigUe Blainville. Jouru. Phys., a-oI. 95, p. 441, pi. 62, fig. 12, 1822. 

 Oralien triglae Oakley, Parasitology, vol. 19, no. 4, p. 460, figs. 3-7, 1927. 



Occurrence. — A single female was taken from the gills of a gurnard 

 captured off Marthas Vineyard. 



Distribution. — British coasts (Bassett-Smith, T. Scott, Leigh- 

 Sharpe) ; Mediterranean (Brian, Milne Edwards). 



Color. — Body of preserved specimens pale yellowish gray ; ovisacs 

 dark brown. 



Female. — Head obcordate and depressed ; neck a little shorter than 

 the trunk; anterior portion of trunk with two pairs of tripartite 

 rudimentary legs on the ventral surface and two pairs of dorsolateral 

 processes. Posterior portion with two pairs of lateral processes and 

 a pair of posterior lobes curved inward. First antennae 1-seg- 

 mented, obpyrif orin ; second antennae 2-segmented, with slender api- 

 cal claw; end segment of second maxilla spinelike, its outer margin 

 toothed; maxillipeds 2-segmented, with a slender terminal claw. 

 Total length, 7 mm. 



Male. — Cephalic segment considerably more than half the entire 

 length and much swollen; trunk segments diminishing regularly in 

 size backward; the last segment alone representing the abdomen. 

 First leg a flat lamina, with two apical setae and an anterior lobe, 

 tipped with a single spine ; second leg also a flat lamina, with a single 

 posterolateral spine. Total length, 0.6 mm. 



ReTYiafrhs. — This genus and species have been badly confused with 

 two other genera, Lernentoiiia Blainville and Medesicaste Kr0yer, 

 but Oakley, in the reference given above, has separated the three and 

 given useful diagnoses. 



Genus PSEUDOCHONDRACANTHUS Wilson, 1908 



Female. — Head distinctly separated from first segment, with a 

 small dorsal carapace; first segment free, the others, including the 

 genital segment, fused into an elongate body without any traces of 

 segmentation ; abdomen small, 2-segmented. Mouth parts near the 

 posterior margin of the head and similar to those of Chondracan- 

 thus^' a single pair of leg rudiments, uniramose, bilobed at the tip. 



