STYLOCHEIRON ABBREVTATT IVr. 281 



Sta. 4679. Dec. 7, I'.JOl. Lat. 17° 20.4' S., lonp;. Sli° 4ti.r)' \V. :iO() fms. to surface. 3 .specimens. 



Sta. 4081. Dec. 8,1904. Lat. 18° 47.1' S., long. 89° 20' W. ;iOO fm.s. to surface. 2 .specimens. 



Sta. 4085. Dec. 10, 1904. Lat. 21° 30.2' S., long. 94° 50' \V. 300 fms. to surface. 4 specimens. 



Sta. 40S7. Dec. 11, 1904. Lat. 22° 49.5' S., long. 97° 30.0' W. 300 fms. to .surface. 1 specimen. 



Sta. 4089. Dec. 12, 1904. Lat. 24° 5' S., long. 100° 20' \V. 300 fms. to surface. 1 specimen. 



Sta. 4091. Dec. 13, 1904. Lat. 25° 27.3' S., long. 103° 29.3' W. 300 fms. to surface. 3 specimens. 



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



Sta. 4099. Dec. 25, 1904. Lat. 21° 39.5' S., long. 104° 29.8' 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 sjK'cimens. 



Sta. 4707. Dec. 29, 1904. Lat. 12° 33.2' S., long. 97° 42' W. 300 fms. to surface. 5 specimens. 



Sta. 4709. Dec. 30, 1904. Lat, 10° 15.2' S., long. 95° 40.8' W. 300 fms. to surface. 1 specimen. 



Sta. 4719. .Jan. 14, 1905. Lat. 0° 29.8' S., long. 101° 16.8' 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. 4730. Jan. 20, 1905. Lat. 1.5° 7' S, long. 117° 1.2 W. 300 fms. to surface. 1 specimen. 



Sta. 4734. Jan. 22, 1905. Lat. 17° 36' S., long. 122° 35.0' W. 300 fms. to surface. 1 specimen. 



Besides I have it from the following localities: — 



Sta. 3681. .^ug. 27, 1899. Lat. 28° 23' N., long. 126° 57' W. 100 fms. 2 specimens. " Albatross." 

 Fiji Islands. 6 m. South of Suva lightship. Dec. 11, 1897. 1.50 fms. 1 specimen. A. Agassiz. 

 Fiji Islands. 3 m. South of Suva lightship. Dec. 11, 1897. 100 fms. 1 specimen. A. Agassiz. 

 Fiji Islands. 3 m. South of Suva lightship. Dec. 11, 1897. 1.50 fms. 1 specimen. A. Agassiz. 



In the ''Siboga" paper I pointed out the main differences between this 

 species and S. maximum H. J. H. But as no adult male was found in the "Si- 

 boga" material, as the copulatory organs have never been figured, and the inter- 

 esting antennulae in adult males are unknown I give some figures of these 

 and other parts with the necessary description; the preservation of the females 

 in the collection does not allow corresponding figures of the antennular flagella 

 in this sex. 



Fig. 5a exhibits the anterior part of a male. The eye has the shape char- 

 acteristic in this species; it is nearly pyriform, the lower area being somewhat 

 or a little less than twice as broatl, but more than twice as deep as the upper. — 

 In the female the antennulae have the two distal peduncular joints slender as 

 in the other species of the genus, and the third joint is conspicuously, though 

 not much, longer than the second; the flagella are slender with round joints. 

 In the male the second and especially the third joint of the antennular peduncles 

 is much thickened, the second slightly shorter than in the female, but the third 

 slightly shorter than the second and gradually more thickened towards the end. 

 The male antennular flagella are very characteristic (figs. 5b and 5c) ; the upper 

 flagellum is somewhat shorter than the peduncle (fig. 5a), 6-jointed; the four 

 proximal joints rather slender, but the first a little expanded towards the base, 

 the second extremely short, and the fourth is distinctly depressed and begins to 

 be a little expanded; the two distal joints together considerably longer than the 

 sum of the four proximal joints, flattened, the fifth distally much expanded 

 inwards with the inner margin of the broadest part finely serrate, the sixth 



