NEMATOBRACHION BOOPIS. 267 



30. Nematobrachion boopis Calman. 



Plate 10, figs. 4a-icl. 



1896. Nemalodaclylus boopis Calman, Traii.s. Roy. Irish Acad., 31. p. 17, pi. 2, figs. 19-28. 

 1905. Ncmalobrachion boopis Calman, Kept. Sea and Inland Fisheries of Ireland, 1902-3, pt. 2, Apj). 4, 

 p. 153, pi. 26. 



Sta. 4681. Dec. 8, 11104. Lat. 18° 47.1' S., long. 89° 20' W. 300 fms to surface. 2 specimens (1 cT, 



1 immat.). 



o. ^ro~ -n. 11 1 nr, 1 t i o.^o .r, -> o 1 n-onnrm- I 300 fms. to surfacc. 1 Specimen, 

 sta. 468 (. Dec. 11, 1904. Lat. 22 49.o S., long. 97 30.6 \\ . - ,, >. , . . , 



( 212:) fms. to surface. 1 specimen. 



Sta. 4695. Dec. 23, 1904. Lat. 25° 22'.4 S., 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. to surface. 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 clumsj'. — 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 Uttle more raised and feebly angular. 



The eyes are extremely largej 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 obliciue 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 ^•ertex 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 jiroduced 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 fii'st joint is somewhat expanded in the distal direction. — 

 The maxillae (fig. 4b) witli the main part a little longer than broad; the palp 



