58 



Stat. 141. Aug. 5. i°o'.4S., I27''25'.3E. From 1500m. depth to surface. Bottom very fine, 



hard sand, i young specimen. 

 Stat. 203. Sept. 19. 3°32'.S S., 124° 15. 5 E. Hensen vertical net from 1500 m. depth to 



surface. 4 specimens, parva stage. 

 Stat. 208. Sept. 22. 5°39'S., 122° 12' E. South of Muna Island. 1886 m. Bottom solid green 



mud. I male. 

 Stat. 230. Nov. 14. 3°58'S., 128° 20' E. South-east of Ambon. From a depth of 2000 m. 



to surface. 3 young specimens, 2 of which belong to the parva stage. 

 Stat. 243. Dec. 2. 4°3o'.2S., I29°25'E. From a depth of 1000 m. to surface, i specimen, 



parva stage. 



The specimen from Stat. 141 is nearly 32 mm. \ong. The rostrum, 6 mm. long, is 

 straight, slightly longer than the carapace (5 mm.) and faintly turned upward; it is ^-dentate, 

 the three posterior teeth of the upper border are placed behind the posterior tooth of the lower, 

 the two posterior and the two distal teeth of the upper border stand a little closer together 

 than the other teeth, which are placed at equal distances from one another and the anterior 

 tooth of the upper border is one and a half as far distant from the ti]) as from the penultimate; 

 except the two posterior the teeth of the lower margin are pairetl with those of the upper. 

 The rostrum projects by the distal 6"^ part beyond the antennal scales. 



The 3'''* abdominal somite has the same form as in Fig. 5, i of Coutiere's quoted paper, 

 the carinate upper border being much more strongly curved than in the adult specimen 

 from -Stat. 208; the spines at the posterior extremity of the dorsal margin of the three following 

 tergites are smaller than that of the 3''<^ and the equal spines of the 5''' and 6"^ tergite are a 

 little larger than that of the 4''^ The 6"'' somite, 4,5 mm. long, is almost twice as long as the 

 5"" (2,36 mm.) and twice as long as wide anteriorly. Telson 4,4 mm. long, almost as long as 

 the 6''^ somite and projecting by half the length of the long terminal spines beyond the exopodite 

 of the uropods; the lateral margins are armed on the left side with 5, on the right with 4 

 spines, the anterior or i^' pair of lateral spines are a little farther distant from the 2"'' as the 

 following from one another. 



The four specimens from .Stat. 203 belong to the parva stage and are 13 — 17 mm. 

 long. In the largest specimen the rostrum projects straight forwards to the far end of i^' antennular 

 article and is s-dentate (Fig. 12a); the 8 teeth of the upper border are placed on the rostrum 

 proper, the i*"' or posterior just in front of the orbital margin, the teeth diminish regularly in 

 size to the 8''', which is about twice as far distant from the p' as from the extremity of the 

 rostrum; the 3 teeth of the lower margin are much smaller and placed opposite the 3 anterior 

 teeth of the upper. In the second specimen the rostrum is as long as the eyestalks and the 

 unarmed apex is slightly turned upwards; it is f-dentate, the teeth are placed like in the 

 preceding specimen and their form and size are also the same. The rostrum of the third agrees 

 in length and characters with that of the i^', but it is i-dentate and the tiu-ee teeth of the 

 lower margin alternate with the 4 distal teeth of the upper; in the fourth specimen the rostrum 

 is mutilated. 



In the three specimens in which the rostrum is preserved, the y^ abdominal somite 

 shows the characteristic shape of the type of Acanth. parva paucidens Cout. (H. Coutiere, I.e. 

 I''&- 5i 3)1 ^o that one at first sight is inclined to regard these .specimens as belonging to a 



