214 • THE SCHIZOPODA. 



5. Thysanopoda aequalis II. J. Hansen. 



Plate 4, fig. 4a. 



190.5. Thysanopoda aegnalis H. J. Hansen, Bull. Mus. Ocean Mon., no. 42, p. 19. 



1910. Thysanopoda aequalis H. J. Hansen, Siboga-Exp., 37, p. 84, pi. 12, figs. 4a-4c; pi. 13, fig. la. 



Sta. 4681. Dec. 8, 1904. Lat. 18° 47.1' S., long. 89° 26' W. 300 fms. to surface. 1 specimen. 



Sla. 4683. Dec. 9,1904. Lat. 20° 2.4' S., long. 91° 52.5' W. 300 fms. to surface. 9 specimens. 



Sta. 4685. Dec. 10, 1904. Lat. 21° 36.2' S., long. 94° 56' W. 300 fms. to surface. 3 specimens. 



„ . , „„n .„-,r, , „-o .,„ ^/ ,TT ( 300 fms. to surface. 8 specimens. 



Sta. 4687. Deo. 11. 1904. Lat. 22° 49.5' S., long. 97° 30.6' W. - ._,,.,., , ^ . ' . 



( 2125 fms. to surface. 5 specimens. 



Sta. 4689. Dec. 12, 1904. Lat. 24° 5' S., long. 100° 20' W. 300 fms. to surface. 1 specimen. 



Sta. 4691. Dec. 13, 1904. Lat. 25° 27.3' S., long. 103° 29.3' W. 300 fms. to surface. 9 specimens. 



Sta. 4695. Dec. 23, 1904. Lat. 25° 22.4' S., long. 107° 45' W. 300 fms. to surface. 1 specimen. 



Sta. 4701. Dec. 26, 1904. Lat. 19° 11.5' S., long. 102° 24' W. 300 fms. to surface. 10 specimens. 



Sta. 4703. Dec. 27, 1904. Lat. 17° 18.6' S., long. 100° 52.3' W. 300 fms. to surface. 3 specimens. 



Sta. 4705. Dec. 28, 1904. Lat. 15° 5.3' S., long. 99° 19' W. 300 fms. to surface. 20 specimens. 



Sta. 4722. Jan. 16, 1905. Lat. 9° 31' S., long. 106°30.5'W. 300 fms. to surface. 2 specimens. 



Sta. 4724. Jan. 17, 1905. Lat. 11° 13.4' S., long. 109° 39' W. 300 fms. to surface. 4 specimens. 



Sta. 4728. Jan. 19, 1905. Lat. 13° 47.5' S., long. 114° 21.6' W. 300 fms. to surface. 4 specimens. 



Sta. 4730. Jan. 20, 1905. Lat. 15° 7' S., long. 117° 1.2' W. 300 fms. to surface. 11 specimens. 



Sta. 4732. Jan. 21, 1905. Lat. 16° 32.5' S., long. 119° 59' W. 300 fms. to surface. 10 specimens. 



Sta. 4740. Feb. 11, 1905. Lat. 9° 2.1' S., long. 123° 20.1' W. 300 fms. to surface. 1 specimen. 



Remarks. — To my earlier descriptions of this ciiaracteristic species some 

 notes on the maxillulae (fig. 4a) may be added. They differ in some features 

 from tliose in T. monacaniha. The proximal lobe is medium sized, with the 

 terminal, somewhat convex margin rather oblique; the distal lobe expands 

 somewhat towards the feebly con\'ex terminal margin, is somewhat broader than 

 long and more than half as broad again as the proximal ; the palp is very oblong- 

 oval with the end very obtuse, besides nearly two and a half times as long as 

 broad and reaches the end of the distal lobe. The pseudexopod is large, yet a 

 good deal smaller than in T. monacantha, twice as long as broad and reaches con- 

 siderably beyond the insertion of the palp. 



Length of one of the largest specimens, an adult male, 17.5 mm. 



Young Specimens. — Specimens measuring 6.5-8 mm. differ in two important 

 particulars from subadults and adults. The frontal plate is proportionately 

 larger, flatter, and the rostrum is a minute, cjuite horizontal denticle. The eyes 

 are much higher than broad, with the upper half yellowish or light brownish 

 and marked off from the distinctly or much darker lower half. The lobe from 

 the first antennular joint has not acquired its full size, but its shape shows that 

 the specimens belong to this species. — Specimens measuring about 10 mm. are 

 intermediate between the adults and the young as to the organs mentioned. 



Dislribulion. — The species is common in the eastern part of the Atlantic 

 from Lat. 36° 17' N. to Lat. 28° N. (Monaco collection), and it has been taken in 

 the Mediterranean (Tattersall) . The Copenhagen Museum possesses speci- 



