NEMATOBRACHION BOOPIS. 267 
30. Nematobrachion boopis Cautman. 
Plate 10, figs. 4a4d. 
1896. Nematodactylus boopis CauMaN, Trans. Roy. Irish Acad., 31, p. 17, pl. 2, figs. 19-28. 
1905. Nematobrachion boopis Carman, Rept. Sea and Inland Fisheries of Ireland, 1902-3, pt. 2, App. 4, 
p. 153, pl. 26. 
Sta. 4681. Dec. 8, 1904. Lat. 18° 47.1’ S., long. 89° 26’ W. 300 fms. to surface. 2 specimens (1 7, 
1 immat.). 
Sta. 4687. Dec. 11, 1904. Lat. 22° 49.5’ S., long. 97° 30.6’ W. 4 200 fms. to surface. 1 prior nang 
( 2125 fms. to surface. 1 specimen. 
Sta. 4695. Dec. 23, 1904. Lat. 25° 22’4S., long. 107° 45’ W. 300 fms. to surface. 1 specimen. 
Sta. 4705. Dec. 28, 1904. Lat. 15° 5.3’S., long. 99° 19’ W. 300 fms. to surface. 2 specimens. 
Sta. 4707. Dec. 29, 1904. Lat. 12°32.2’S., long. 97° 42’ W. 300 fms. to surface. 1 specimen. 
Sta. 4722. Jan. 16, 1905. Lat. 9° 31’S., long. 106° 30.5’ W. 300 fms. to surface. 1 specimen. 
Sta. 4724. Jan. 17, 1905. Lat. 11° 13.4’S., long. 109°39’ W. 300 fms. tosurface. 1 specimen. 
Sta. 4742. Feb. 15, 1905. Lat. 0° 3.4’ N., long. 117° 15.8’ W. 300 fms. to surface. 1 specimen. 
Description.— Body somewhat clumsy.— The frontal plate is a very short 
triangle with the vertex obtuse and without any vestige of a rostrum; the 
lateral margins are very conspicuously raised, nearly vertical; the keel between 
the cervical groove and the tip of the frontal plate is rather high, with a short 
portion slightly in front of the middle a little more raised and feebly angular. 
The eyes are extremely large, dark brownish or nearly blackish above on 
the somewhat flatly vaulted upper surface; somewhat lighter on the outer side, 
on which is seen a nearly horizontal or somewhat oblique light groove, separating 
the very large upper section from the lower small section which is developed only 
on the outer side and less than twice as high as the upper.— The antennular 
peduncles are short and robust, the proximal joint very considerably raised above 
at the distal end about as a transverse, subvertical lobe which, seen from in 
front, is subtriangular, much broader than high, with the vertex broadly rounded 
and very setose; the joint has no spiniform process at the outer distal angle. 
Second joint somewhat vaulted above towards the end, slightly produced above 
the base of third joint, with the upper outer corner of this produced part either 
angular or feebly projecting as a small, short tooth. . Third joint with the dorsal 
keel rather short and moderately low.— Antennal squama somewhat narrow, 
tapering to the broadly rounded end and without outer distal tooth; terminal 
joint of the peduncle of the endopod somewhat thickened. 
The maxillulae (fig. 4a) with the proximal lobe scarcely as broad as the 
distal, which is about as broad as long, while the palp is very slender and slightly 
longer than the outer margin of the distal lobe; a pseudexopod is not developed, 
but the lobe of the first joint is somewhat expanded in the distal direction — 
The maxillae (fig. 4b) with the main part a little longer than broad; the palp 
