192 . STALK-EYED CRUSTACEA. 
Station 3414. 2232 fathoms. 4 fem. 
a Ss41on L879 es 1 fem. 
In his General Sketch of the “ Albatross” Expedition of 1891, Mr. Agassiz * 
records the capture of some transparent Peneidx at Station 3414 by means 
of the Tanner net towed at 100 and 200 fathoms below the surface. The 
only Peneide that I find in the collection from Station 3414 are Huliporus 
doris and Benthesicymus altus. The accompanying labels do not indicate that 
these specimens were caught in the tow-net. 
Haliporus thetis Fax. 
Plate XLVIIL, Fig. 2-2. 
Bull. Mus. Comp. Zodl., XXIV. 214, 1893. 
Integument membranaceous. Rostrum rather less than one third as long 
as the remaining part of the carapace, strongly upturned, upper margin 
convex, armed with five teeth, the distal of which is near the tip and very 
minute. A distinct carina bearing three teeth, runs the length of the median 
line of the gastric area, from the base of the rostrum to the cervical groove. 
Behind the cervical groove the carina continues as a low, blunt ridge along 
the median line of the back to the posterior border of the carapace. Posteri- 
orly this ridge gives off two pairs of lateral branches, which course diagonally 
backward to the posterior margin of the carapace, and mark off two trian- 
gular fields on the cardiac region, one enclosed within the other. The 
median ridge is obsolete for a short distance behind each point of bifurcation 
as well as at the posterior margin of the carapace. The spy armature 
of the carapace consists of an antennal, a very small branchiostegal, an 
hepatic, and a lateral spine on the posterior border of the cervical groove, — 
four in all. The spine which lies a little way behind, and on a level with, the 
branchiostegal spine in HZ. nereus and H. doris is lacking in this species. The 
antennal region is separated from the adjacent orbital and hepatic regions 
by a well pronounced depression, and, in a similar way, the orbital region 
is separated from the gastric by a gastro-orbital sulcus. Behind the cervical 
groove, defined by shallow furrows, lies a triangular area, the anterior limit 
of which is formed by the cervical groove itself. The hindmost of the lateral 
spines lies on the anterior margin of this area. The cardiac area is separated 
from the branchial by a rather deep furrow, each edge of which rises into 
* Bull. Mus. Comp. Zool., XXIII. 52, 1892. 
