294 " TERRA NO VA " EXPEDITION. 



Tarsal joint of the third to the eighth thoracic limbs composed of only two joints 

 in addition to the terminal dactylus which is well developed. 



Sixth abdominal somite one and a half times as long as the fifth. 



Telson shorter than the sixth abdominal somite (about two-thirds) and about three- 

 fifths of the length of the inner m'opod, cleft about one fifth of its length ; cleft armed 

 with a pair of plumose setae at the apex, extending beyond the terminal spines, and with 

 about twelve teeth on each side ; lateral margins of the telson armed with from nine 

 to twelve spines, including the terminal ones, rather widely spaced and approximately 

 equidistant, the three proximal spines longer than the remainder except the terminal 

 ones, which are one-eighth of the length of the telson. 



Inner iiropod one and two thirds of the length of the telson, inner margin with 

 a row of spines, about ten in number, the first five situated in the region of the 

 statocyst, the remainder distantly placed along the margin, the most distal spine about 

 one quarter of the length of the uropod from the apex. 



Outer uropod one quarter longer than the inner. 



Exopod of the fourth pleopods of the male with a long modified seta on each of 

 the antepenultimate and penultimate joints. 



Length of an adult female, with well-developed In'ood lamellae and eggs in the 

 brood pouch, 7 mm. 



RemarJcs. — This species is very closely allied to T. novae-zealandiae, but is a smaller 

 species and differs in the characters of the rostral plate, the shorter and the relatively 

 broader antennal scale, and the fewer spines on the margins of the telson and its cleft 

 and on the inner uropods. 



The specimens recorded by Thomson from the Bay of Islands as T. novae- 

 zealandiae belong to this species, which appears also to differ from the former in its 

 more purely marine habit. 



16. Tenagomysis macropsis, sp. nov. (Plate III, figs. 1-12.) 



Occurrence. — " Terra Nova," North of New Zealand. Station 132, one ; 

 Station 133, one ; Station 135, eight ; Station 136, one ; Station 148, one ; Station 242, 

 numerous, immature. Ocean Beach, collected by Crosby Smith, January, 1904, one ; 

 Akaroa, collected by H. Suter, one ; from Professor C. Chilton. 



Description. — Carapace short, leaving the last three thoracic somites exposed, 

 roundly arched in front without definite rostral projection, antero-lateral angles 

 produced into acute spines, no pseudo-rostral process. 



Eyes in the male about three times as long as broad, the cornea occupying the 

 distal third of the eye, extending to the distal end of the antennular peduncle and 

 equal to the antennal peduncle. In female and immature specimens the eye is 

 somewhat longer and narrower, and the cornea occupies only the distal quarter of 

 the whole eye. 



Antennal scale equal in length to the antennular peduncle, six times as long as 



