214 THE SCHIZOPODA. 
5. Thysanopoda aequalis H. J. Hansen. 
Plate 4, fig. 4a. 
1905. Thysanopoda aequalis H. J. HANSEN, Bull. Mus. Océan Mon., no. 42, p. 19. 
1910. Thysanopoda aequalis H. J. HANSEN, Siboga-Exp., 37, p. 84, pl. 12, figs. 4a—4c; pl. 13, fig. la. 
Sta. 4681. Dec. 8, 1904. Lat. 18° 47.1’ S., long. 89° 26’ W. 300 fms. to surface. 1 specimen. 
Sta. 4683. Dec. 9, 1904. Lat. 20° 2.4’S., long. 91°52.5'W. 300 fms. to surface. 9 specimens. 
Ste. 4685. Dec. 10,1904. Lat. 21° 36.2’S., long. 94°56’ W. 300 fms. tosurface. 3 specimens. 
. = 300 fms. to surface. 8 specimens. 
_ 99° J bd ° , Ty 
Sta. 4687. Dec. 11,1904. Lat. 22° 49.5'S., long. 97° 30.6’ W. ee fms. to surface. 5 ence 
Sta. 4689. Dee. 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. 300fms. to surface. 10 specimens. 
Sta. 4703. Dee. 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. 300fms.tosurface. 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 characteristic species some 
notes on the maxillulae (fig. 4a) may be added. They differ in some features 
from those in 7’. monacantha. The proximal lobe is medium sized, with the 
terminal, somewhat convex margin rather oblique; the distal lobe expands 
somewhat towards the feebly convex 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 7’. 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, quite 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. 
Distribution.— 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- 
a i en Oe aE ly I ft, 
