179 



Stat. 164. Aug. 20. i°42'.5 S., I30°47'.5 E. Between the islands ofMisool and Salawatti. 32 ra 

 Bottom sand, small stones and shells. 1 young specimen. 



Stat. 306. Febr. 8, 1900. 8° 27' S., i22°54'.sE. Lobetobi Strait. 247 m. Bottom sandy mud. 

 1 specimen of medium size without eggs and 1 still younger specimen. 



Stat. 312. Febr. 14, 1900. 8° 19' S., U7°4i'E. Saleh-bay. 274 m. Bottom fine, sandy mud. 6 

 ad uit specimens, 3 of which are ova-bearing. 



Spence Bate describes the rostrum as half as long as the carapace, but, according to 

 the measurements mentioned by him and according to the figure, the rostrum measures three- 

 fourths the length of the carapace. In the young specimen from Stat. 164 the carapace is 

 6,7 mm. long, the rostrum, measured from the orbital margin to the apex, 5,25 mm., the 

 proportion between both being the same as in the. typical species-, the rostrum, that just 

 reaches beyond the antennal scale and that, though slightly ascending, does not extend above 

 the level of the carapace, is armed dorsally with 10, ventrally with 4 teeth. In Bate's figure 

 the teeth, in which the 4 th and 5 th abdominal terga terminate, appear very small, much smaller 

 than the tooth of the 3 rd tergum: as regards this character the specimen from Stat. 164 fully 

 resembles the type. 



In all the other specimens, however, that were collected in the more western parts of 

 the Archipelago, the teeth of the 4 th and 5 th terga are a little larger in proportion to the 

 tooth of the 3 rd tergum and in all these specimens the rostrum is a little longer than the 

 carapace and has a more si en der form. In the young specimen from Stat. 47 the rostrum is 

 broken off just beyond the antennal scale, so that its length cannot be indicated; the carapace 

 is 7,1 mm. long. In this specimen the carinae on the carapace are more conspicuous than in 

 the others; the post-antennular carina runs quite distinctly from near the posterior margin 

 uninterruptedly to the orbital spine, while the posterior half of the post-ocular becomes rather 

 indistinct distally, there where it curves towards the other. In the larger specimen from Stat. 306 

 the carapace is 8,5 mm. long, the rostrum 9 mm.; the rostrum which reaches by two-fifths of 

 its length beyond the antennal scale and which is rather much upturned above the level of 

 the carapace, is ^-dentate; the carapace of the young individual is only 4,4 mm. long, the 

 rostrum is broken off near the tip of the antennal scale. 



The 6 specimens from Stat. 312 are almost full-grown, the length of the carapace varies 

 between 10 mm. and 10,7 mm., the length of the rostrum between 10,25 mm. and 12,2 mm.; 

 in the specimen without eggs, of which the carapace is 10,25 mm. long, the rostrum 12,2 mm., 

 the latter is -^-dentate, reaches by two-fifths its length beyond the antennal scale and is distinctly 

 turned upward above the level of the carapace; in the four other females the rostrum is y, 

 ±^, i* and ^-dentate, while in the last specimen it is broken off. We may therefore conclude, 

 that the number of dorsal teeth varies from 9 to 14, for in one of the two individuals, from 

 the Red Sea, mentioned by Dr. Balss (1. c), the upper margin was only armed with 9 teeth ; 

 the lower margin bears 4 to 6 teeth, in the specimen from the Red Sea only 2 were observed. 

 Usually four teeth stand on the carapace, the 5 ,h above the orbital margin; in one of the 

 specimens from Stat. 312, the rostrum of which is y-dentate, five teeth were placed on the 

 carapace and in the larger specimen from Stat. 306 only three stood behind the orbital margin, 

 the 4 th being placed just above it. In all these specimens from Stat. 312 the lateral carinae 



