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 hteratm-e. 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-3c. 



1S93. Thysanopoda monocanllia Ohtmann, Ergebn. du Plankton-Exped., 2, G. b. p. 9, taf. 1, fig. 2. 



1894. Thysanopoda agassizii Ortmann, Bull. Mus. Comp. Zool., 25, p. 09, plate, tigs. 1-2. 



190.5. Thysanopoda lateralis H. J. Han.sen, Bull. Mus. Ocean. Monaco, no. 30, p. 18. 



1908. Thysanopoda ctenophora Illig, Zool. Anz., 23, p. 112. 



1910. Thysanopoda agassizii H. J. Hansen, Siboga-Exp., 37, p. 87, pi. 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° 5.5.2' W. 300 fms. to surface. 1 specimen. 



Sta. 4679. Dec. 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. 46S3. 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. Dec. 26, 1904. Lat. 19° 11.5' S., long. 102° 24' 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. 16 specimens. 



Sta. 4707. Dec. 29, 1904. Lat. 12° 33.2' 8., long. 97° 42' W. 300 fms. to surface. 1 specimen. 



Sta. 4709. Dec. 30, 1904. Lat. 10° 15.2' S., long. 95° 40.8' \V. 300 fms to surf.ace. 13 specimens. 



Sta. 4711. Dec. 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. to surface. 1 specimen. 



Sta. 4740. Feb. 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. 



