686 Beady and Noeman — Monognq^h of the Marine and Freshtvater Ostracoda 



diagonally, the edges of the areas overlapping each other in a squamous 

 fashion ; supero-posteal angle of each valve armed with three or four rather large 

 marginal teeth. Shell of the male somewhat narrower than that of the female. 

 Length 3 mm. 



Capitulum of the frontal tentacle acutely-pointed at the apex, slightly hispid 

 in the female (fig. 15), scarcely dilated at the base; in the male (fig. 13) dilated 

 and rectangularly truncate. Antennules of the female (fig. 12) as in the 

 preceding species, in the male (fig. 13) bearing three long setae, the first of 

 which is considerably longer than the other two, geniculated beyond the 

 middle, and bearing along the median portion of its posterior margin a series of 

 closely set, simple, recurved, spine-like cilia (fig. 14) ; there are also two short, 

 sensory filaments, of which the posterior is recurved and very much convoluted. 

 Caudal laminae (fig. 17), bearing on the anterior margin a single, long, slender 

 spine, and on the posterior seven curved and finely pectinated spines, the 

 posterior four much shorter than the rest. 



Amongst the Lofoten Islands in a depth of 250—300 fathoms (G. 0. Sars) ; 

 Trondhjem Fiord, Norway, 150 fathoms (A. M. N.). Professor G. 0. Sars 

 remarks that he has found C. lorcalis only in one locality on the fishing bank of 

 Lofoten, but that it was here tolerably abundant, and occurred in company with 

 C. elegans, from which it was readily distinguislied by its larger size, and by the 

 form of the shell, notably by the sinuation of the ventral margin. 



3. Couchoecia maxima, n. sp. 



(PI. LXI., figs. 1-8.) 



Shell, seen from the side, subquadrangular, considerably higher behind than 

 in front, greatest height scarcely equalling half the length ; rostral prominence 

 acutely pointed, with a rather deeply hollowed sinus beneath ; anterior extremity 

 well rounded away below, posterior truncated and widely rounded off below, 

 obtusely angular above ; doi'sal margin almost straight, except for an abrupt 

 depression near the middle ; ventral very slightly arcuate ; in the male the postero- 

 dorsal angle of both valves bears a series of three teeth, the last of which is much 

 thicker and larger than the others (fig. la). Seen from alcove, the outline is 

 evenly ovate, about thrice as long as broad, extremities equal, sub-acute. The 

 capitulum of the frontal tentacle (figs. 2, 3) is club-shaped, acutely pointed at the 

 apex, and in the male dilated and truncated at the base ; hispid with short, rather 

 thickly set hairs. The stem of the antennule (fig. 2) shows, scattered through it 

 in an irregular group, a number of dark red (? lenticular) bodies; and in the male 

 the proximal long seta is armed throughout its middle third with a series of about 



