CHAETOGNATHA COLLECTED BY STEAMER ALBATROSS. 



243 



example, No. 9 alone had mature ovaries, but its measurements agree 

 with the other larger and immature specimens. 



TABLE 1. Measurements of Sagitta enflata. 1 



2.1.2 

 23. 7 

 23. 6 

 23.2 

 21.1 

 20.6 

 KS 

 IS. 4 

 15.8 



is. a 



10.2 



10.7 

 10.7 



8.7 

 10.4 



9. 9 

 12.4 

 12.8 

 11.8 

 12.5 



9.7 



7.7 



74.5 

 74 



69.8 

 73 



74.8 



71.6 



70. 4 



73. C 



71 



71.7 



72.3 



Posterior fin. 



17.T) 



10.9 



17.3 



8.3 



4.8 



66.7 

 62.5 

 80.3 



fi2 



64.1 



64.8 



65 



63.4 



S3. 



70 



59.9 



Anterior fin. 



11.8 

 12.2 

 14.9 

 13.4 

 15. S 

 13.6 

 15.6 

 17.7 

 11.6 

 16.2 

 10.7 



15.4 

 16.9 



18.2 



10-7 

 8-7 

 9-11 



7- 7 



8- 9 



14-14 

 15-15 



14-15 

 13-13 



8-8 

 8-8 

 9-9 



8-8 

 8-8 

 8-7 

 9-8 

 9-9 

 8-9 

 7-8 



1 All measurements made in per cent of total length of animal. 

 ' Per cent of posterior fin in front of tail-septum. 



Distribution. S. enflata was collected from 39 stations, or 85 per 

 cent of the 46 stations at which chaetognaths were taken, a total 

 of approximately 2,800 specimens having been obtained. Of the 39 

 stations 8, or 21 per cent, were mesoplanktonic, while 31, or 79 per 

 cent, were epiplanktonic, and 22, or 56 per cent, were surface stations. 

 From the 8 mesoplanktonic stations a total of 247 specimens was 

 obtained, or an average of 31 per station, while from the 31 epiplank- 

 tonic stations a total of 2,559 specimens, or an average of 83 per 

 station, was obtained, and from the 22 surface stations a total of 

 1,476 specimens, or an average of 67 per station, was obtained. 

 These data, together with the fact that all subsurface hauls were 

 made with open nets, make it clear that S. enflata occurs typically 

 in the upper epiplankton of the Philippine region. 



The northernmost record of its capture during the Philippine expe- 

 dition is 14 21 '.5 north and 120 23 '.3 east in the China Sea near 

 southern Luzon. The southernmost record is 5 36M south and 

 127 T. 6 east in Buton Strait. The easternmost and westernmost 

 records are 127 44'.0 east and 1 3'.0 south, south of Patiente Strait, 

 and 117 53' east and 21 31' north in the China Sea off Hongkong. 

 The largest number (950) was taken February 7, 1908, at 8.05 in the 

 morning from 25 fathoms by an open 0000 grit-gauze net towed 

 horizontally 9 fathoms above the bottom of the Sulu Archipelago, 

 near Basilan Island, at 6 44'.2 north and 121 47' east. Other 

 species taken in the same haul are: 318 S. bedoti, 217 8 ferox, 116 

 S. pulcJira, 2 S. Jiexaptera, and 19 P. draco. The complete records of 

 its capture are given in table 2 : 



