lO 



rounded. Antennal spine well-developed, hepatic spine rather large; the longitudinal suture 

 extends almost to the posterior margin of the carapace and the transverse suture is quite distinct. 



First, second and third abdominal terga rounded, fourth obtusely carinated, fifth and 

 sixth sharply, the carina of the 6"' terminating in a sharji tooth; the 6''' somite, 3 mm. long, 

 has an elongate form, being 3 -times as long as broad in the middle. Telson one-sixth 

 shorter than 6"' somite, 2,5 mm. long and armed, besides with a single pair of fixed marginal 

 spines, with 2 pairs of small articulating spines i n f r on t of t he fo r mer. The 

 telson reaches to the posterior fourtli of the inner uropod, outer uropod only a trifle longer 

 than inner; telson longitudinally grooved in front of the fixed marginal spines. 



Antennular peduncle a little shorter than the antennal scale, reaching as far forward 

 as the antero-lateral spine of the latter. 



The external maxillipeds reach as far forward as the basal joint of the antennular 

 peduncle, to the middle of the antennal scale. The peraeopods of the i*' pair reach to the 

 anterior margin of the carapace and are bispinose, the spine at the far end of the ischium 

 twice as large as that at the base ; those of the 2"'' ])air project to the middle of the eyes, 

 those of the 3'''' just beyond them, both unarmed at base, peraeopods of the 4''' pair just as 

 long as those of the 3'*'. 



8. Sicyonia parvjtla de Haan. 



Sicyonia parvula dc Haan, J. G. DE Man, Siboga Exp., Monogr. 39(7, I'art I, Family Penaeidae, 

 191 1 (text) p. 117, 191 3 (plates) PL X, fig. 40 — 40^/. 



Stat. 109. July 5/6. Oft" Pulu Tongkil, Sulu-archipelago, plankton, at night, i young female. 



This specimen is 15,5 mm. long (carapace 5,2 mm., abdomen 10,3 mm.) and agrees 

 very well with the cited description, excepting only the rostral teeth. The rostrum, which near 

 the base appears, in a lateral view, a little more than one and one-third as broad as at the 

 denticulate tip, being here 0,33 mm. broad, near the base 0,46 mm., difters from the young 

 female, collected at Stat. 164 (I.e. Fig. 40), by the i*' rostral tooth being placed a little 

 more backward, so that there are three teeth on the carapace; five teeth stand on the 

 upper margin of the rostrum, of which the anterior one is strongly curved downward and 

 projects a little beyond the acute tip of the rostrum that is also curved downward, while the 

 tooth of the lower margin extends likewise a little beyond the tip. The apex of the 3"! cara- 

 pacial tooth (which in Fig. 40 is placed above the orbital margin) is a little more than one 

 and a half as far distant from the i^' rostral tooth as the latter from the 2"''; the distances 

 between the apices of the following teeth regularly diminish in length. The two posterior teeth 

 on the carapace are placed as in Fig. 40. 



The longitudinal, slightly curved ridges that define the abdominal pleura superiorly, 

 are well-developed on the 2"'', 3"', 5"' and 6''^ somites, but are wanting on the 1*' and the 4'''; 

 according to the cited description they should be conspicuous on the three first, but indistinct 

 on the three posterior. • 



The thelycum much resembles that of Sic. occi/afa (J. G. de Man, 1. c. Fig. 43), but 



