Family SCYLLARIDAE. 



37. Scyllarus sp. 



Stat. 75. June 5'h. 4° 5 f. 4. S., II9°2'.8E. Oft' Makassar. Plankton. [ very young specimen. 



I do not succeed in identifying this specimen with one of the known species, because 

 it shows still juvenile characters : it will perhaps once prove to be the young of Scyllarus 

 Mctrtensii, a species known from Makassar, because the 3 rd abdominal tergum is much more 

 prominent than the rest. This specimen is 7,1 mm. long from the anterior border of the 

 carapace to the end of the telson. The carapace is 2,6 mm. long, measured in the median 

 line, the antero-lateral angles that project a little beyond the anterior border of the carapace, 

 are 3,2 mm. distant, the carapace appearing here 1 / s broader than long. A little in front of 

 the anterior third, at 1 mm. from the antero-lateral angle, the lateral margins of the carapace 

 show a small incision and a somewhat smaller incision exists in the middle ; the lateral margins 

 are armed along their whole length with numerous small teeth of somewhat unequal size and 

 length ; between the antero-lateral angle and the anterior incision one observes at the right 

 side 7, at the left 8 teeth, between the two incisions 8 and behind the posterior one about 

 15 teeth at either side. The anterior border of the carapace appears behind the antennular 

 segment broadly rounded, but reaches here less forward than the lateral parts of the anterior 

 border; in a lateral aspect, however, the anterior border rises here upward as a small acute 

 tooth. A much larger, also acute tooth arises on the posterior half of the gastric region with 

 the bind acute tip directed forward ; a third acute tooth, a little smaller than the gastric one, 

 arises immediately behind the cervical groove. The 2 nd and the 3" 1 tooth are a little uneven 

 above in the midline ; at each side of the 3 rd one observes on the slightly elevated cardiac 

 region a few minute tubercles, a few occur also more backward, at either side, on the intestinal 

 region, but for the rest the upper surface appears between the lateral carinae smooth. The 

 lateral carinae are as usual divided by the cervical groove into a shorter anterior and a longer 

 posterior portion ; both portions are denticulate, the anterior presenting two larger teeth 

 anteriorly behind one another, the posterior terminating anteriorly in an acute tooth, behind 

 which 3 or 4 smaller teeth occur. Outer border of the orbits denticulate. Posterior margin of 

 carapace concave in the middle. 



The antennular segment bears at either side a tooth or spine on the anterior border, 

 the apices of which are 0,52 mm. distant, nearly 1 / e the distance between the antero-lateral 

 angles of the carapace ; a much smaller denticle occurs on the anterior border at either side 

 and close to the median incision. 



