35 



J 



f Clasping organ of the lower antennular flagellum 

 without any protuberance on the upper margin of 

 the curved part of the "branch". Petasma has a well 

 developed pars astringens with the row of marginal 



coupling hooks ^^. Sidogcc n. sp. 



ff Clasping organ of the lower antennular flagellum with 

 a conspicuous protuberance directed backwards from 

 the angularly bent upper margin of the "branch". 

 Petasma without pars astringens A. serrulatus Kr. insi/loir 





Ciliated part of the outer margin of the e.xopod of the 



uropods nearly or fully as long as the glabrous part . . A. dispar n. sp. shoL^lo' 'oe. 

 b. Trochanter of third pair of legs with a conspicuous triangular 



tooth on the inner margin near its distal end .A. spijiigcr n. sp.[ s^^^J^^;^ i. 



Key to the Females. 



A. Ciliated part of the outer margin of the e.Kopod of the uropods con- 

 spicuously shorter than the glabrous part. 



a. Trochanter of third pair of legs withoijt any tooth on its inner 



[-MoulX be g'"V7.q ,J"'-"'g^^ Nc^&.i'i ) , 



margin near the end. A. vulgaris n. s-p.. A. ' SwogcB n. sp., and A. sertnilatus Y^x.i- \*^su\i 



b. Trochanter of third pair of legs with a conspicuous triangular 



tooth on the inner margin just before the end A. spiniger n. sp.f s''0'^'<^ \)t 



B. Ciliated part of the outer margin of the exopod of the uropods nearly , ^ i , ,r,,„ ^ , ^, ^U;^ L ^ 



or fully as long as the glabrous part. . . . A. dispar n. sp.,. and A. cliitiensis n. sp. 



I. Acetes vulgaris n. sp. PI. Ill, figs. 2a — 2r. 



Stat. 4. March 9. Lat. 7°42' S., long. II4°I2'.6E. Anchorage oft" Djangkar (Java). 9 m. 



Coarse sand. 2 females. 

 Stat. 47. March 8 — 12. Bay of Bima, near south fort. 55 m. Mud with patches of fine coral 



sand'. I female. 

 Stat. 311. Febr. 12 — 13. Sjkpeh bay, east coast of Sumbawa. Up to 36 m. Mud and sand. 



I female. 



The Copenhagen Museum possesses specimens from the following four localities, of which 

 two are within the "Siboga" area. 



Surabaya, Java. Capt. ANDREA. 1870. 2 males. 



Cheribon, Java. Capt. Anurea. 1870. 8 males, 5 females. 



Malakka. Cand. pharm. Mariu.s Jensen. Very large number of specimens. 



Koh Kahdat, in the Gulf of Siam. Dr. Th. Mortensen 25/I 1900. Large number of specimens. 



M ale. — Eyes a little larger than in the other species, their- transverse diameter being 

 conspicuously more than half as long as the distal joint of the stalk with eye. Antennula; (fig. 2 a) 

 with the two distal joints of the peduncle a little longer and thicker than in the female (fig. 7b), 

 taken together not much longer than the outer margin of first joint; third joint scarcely or at 



