204 ATTSTKALIAIT MALACOSTBACA. 



mesial dorsal carina on the second, third, fourth, fifth and sixth. 

 A deep lateral notch on the posterior border of the fourth and 

 fifth segments. Last abdominal segment with a narrow mesial 

 groove ; its apex spiniform ; its lateral border armed with three 

 spines. Length 1\ in. 



A single, imperfect, male specimen of this species, from 

 Katow, New Guinea, is in the Macleay Museum collection. 



379. Penseus Palmensis. 



Penceus Palmensis, Haswell, 1. c, p. 43. 



Rostrum short, hardly exceeding the eyes in length, strongly 

 reflexed from the base, straight in the rest of its extent, sub-acute, 

 with eight teeth above — the last separated from the penultimate 

 by a wide interval ; unarmed below. No dorsal carina on the 

 carapace. Surface of carapace pilose ; gastro-hepatic sulcus 

 shallow ; orbital spine absent ; antennary and hepatic spines 

 present. Elagella of antennules very short, not much exceeding 

 in length the last segment of the peduncle. Palp of external 

 maxillipedes exceedingly short and slender. Proportionate 

 length of ambulatory limbs as in preceding species ; a spine on 

 the under surface of the second joint of the first and second 

 pairs. Abdomen with the second to the sixth segments carinated. 

 Posterior borders of the first and second with a shallow excava- 

 tion on each side ; those of the fourth and fifth with deep notches. 

 No spines in the middle of the posterior border of the sixth 

 segment. Last segment with a narrow mesial groove ; its apex 

 spiniform ; its lateral margins armed with several spines. Length 

 about li in. 



Palm Island (Chevert Exped.). 



G-enus Sicyonia, Milne- Edwards. 

 Three anterior pairs of legs linear ; two posterior pairs not 

 annulated. Carapace with a short rostrum, semi-calcareous, 

 dorsally carinate. Abdominal appendages uniramous. Second 

 and third pairs of maxillipedes not palpigerous. Internal 

 antennae very short. 



380. Sicyonia sp. ? 



Rostrum and dorsal carina of carapace with seven strong teeth 

 above ; rostrum not reaching to the extremity of the antennary 



