212 THE SCHIZOPODA. 
antennal squama instead of from the tip of the rostrum.— Ortmann’s descrip-: 
tion is incomplete and his figure not very good, but I have no doubt that he 
examined a young specimen of this species. 
It may be added that the postero-lateral denticle on the carapace changes 
its place. In the smallest specimen it protrudes from the lateral margin itself, 
in the somewhat larger specimen a little above that margin, and in the adult 
male still a little higher, but yet slightly nearer to the lower margin than to the 
longitudinal furrow. 
Distribution. This species has a very extensive distribution but seems to 
be rare, only two specimens being mentioned in the literature. The type of 
Sars was taken at Lat. 5° 47’ N., long. 124° 1’ E., South of Mindanao, Philippine 
Islands; Ortmann’s specimen was captured in the Sargasso Sea, North Atlantic. 
For various reasons I think that adult specimens generally live in very consid- 
erable depths. 
4. Thysanopoda monacantha Ortmann. . 
Plate 4, figs. 3a-3ce. 
1893. Thysanopoda monocantha ORTMANN, Ergebn. du Plankton-Exped., 2, G. b. p. 9, taf. 1, fig. 2. 
1894. Thysanopoda agassizii ORTMANN, Bull. Mus. Comp. Zodl., 25, p. 99, plate, figs. 1-2. 
1905. Thysanopoda lateralis H. J. HANSEN, Bull. Mus. Océan. Monaco, no. 30, p. 18. 
1908. Thysanopoda ctenophora Itu1G, Zool. Anz., 28, p. 112. 
1910. Thysanopoda agassizii H. J. HANSEN, Siboga-Exp., 37, p. 87, pl. 13, figs. 3a-3g. 
Sta. 4634. Nov. 4, 1904. Lat. 4° 35.4’ N., long. 83° 32.3’ W. 300 fms. to surface. 1 very young 
specimen. 
Sta. 4663. Nov. 16, 1904. Lat. 11° 20.3’S., long. 88° 55.2’ W. 300fms. to surface. 1 specimen. 
Sta. 4679. Dee. 7, 1904. Lat. 17° 26.4’S., long. 86° 46.5’ W. 300 fms. to surface. 18 specimens. 
Sta. 4681. Dec. 8, 1904. Lat. 18° 47.1’S., long. 89° 26’ W. 300 fms. to surface. 17 specimens. 
Sta. 4683. Dec. 9, 1904. Lat. 20° 2.4’S., long. 91° 52.5’ W. 300 fms. to surface. 8 specimens. 
Sta. 4685. Dec. 10, 1904. Lat. 21° 36.2’S., long. 94° 56’ W. 300 fms. to surface. 1 specimen. 
Sta. 4701. Dee. 26, 1904. Lat. 19° 11.5’S., long. 102° 24’ W. 300 fms. to surface. 1 specimen. 
Sta. 4705. Dee. 28, 1904. Lat. 15° 5.3’S., long. 99° 19’ W. 300 fms. tosurface. 16 specimens. 
Sta. 4707. Dec. 29, 1904. Lat. 12° 33.2’S., long. 97° 42’ W. 300 fms. to surface. 1 specimen. 
Sta. 4709. Dec. 30, 1904. Lat. 10° 15.2’S., long. 95° 40.8’ W. 300 fms to surface. 18 specimens. 
Sta. 4711. Dee. 31, 1904. Lat. 7° 47.5’ S., long. 94° 5.5’ W. 300 fms. to surface. 2 specimens. 
Sta. 4719. Jan. 14, 1905. Lat. 6° 29.8’S., long. 101° 16.8’ W. 300 fms. to surface. 3 specimens. 
Sta. 4721. Jan. 15,1905. Lat. 8° 7.5’S., long. 104° 10.5’ W. 300 fms. to surface. 2 specimens. 
Sta. 4722. Jan. 16,1905. Lat. 9° 31’ S., long. 106° 30.5’ W. 300 fms. to surface. 7 specimens. 
(1 very small). 
Sta. 4724. Jan. 17,1905. Lat. 11° 13.4’S., long. 109° 39’W. 300 fms. to surface. 1 small specimen. 
Sta. 4728. Jan. 19, 1905. Lat. 13° 47.5’ S., long. 114° 21.6’ W. 300 fms. to surface. 3 specimens, 
very small. 
Sta. 4730. Jan. 20,1905. Lat. 15°7’S., long. 117° 1.2’ W. 300 fms. tosurface. 1specimen. 
Sta. 4740. Teb. 11, 1905. Lat. 9° 2.1’S., long. 123° 20.1‘ W. 300 fms. to surface. 1 specimen. 
Remarks.— Both subadult specimens, very young specimens, and older 
larvae have been described and figured in the ‘‘Siboga”’ paper quoted. Here 
a few remarks are sufficient. 
