MACRURA. SCII MITT. 341 



teeth in addition to the epigastric ; the stridulating organ 

 was composed of from 11 to 20 ridges ; and the thelycum 

 varied between the form figured by Alcock (I.e.) and 

 that figured by de Man (I.e.). 



"PENJEUS NOVJE-GUINEJE." 

 (Plate Ixi., fig. 2a-b. Plate Ixviii., fig. 2a-6.) 



Of the four specimens of P. novce-guinece received 

 from the Australian Museum (Reg. No. P.412), the 

 largest is a female about 64 mm. long; its rostrum is 

 about 8 mm. long, and reaches nearly to the middle of 

 the third or terminal joint of the antennular peduncle. 

 Including the epigastric tooth, which is not much in 

 evidence on the badly broken carapace of this specimen, 

 there are eight rostral teeth. The harshly tomentose 

 carapace is about 16 mm. long and shows no post-rostral 

 carina. The stridulating apparatus consists of nine 

 ridges transversely placed on the naked curved band near 

 the postero-lateral angle of the carapace; the antero- 

 lateral angle is spined. The third maxillipeds of this 

 specimen are nearly as long as the antennal scale, which 

 is exceeded by the third chelipeds by the length of their 

 fingers; the first legs exceed the antennal peduncle by 

 the length of their fingers, and are exceeded by the second 

 by the length of their hands; and these fall short of just 

 reaching to the ends of the carpus of the third legs. The 

 fourth legs are wanting, and the left fifth, its mate being 

 lacking, reaches through five-eighths the length of the 

 antennal scale. 



There is no carina on the first abdominal somite. 

 On the second, however, there is a faintly sulcate, blunt 

 carina on the posterior two-thirds of the somite. Narrow- 

 ing posteriorly and becoming more flattened, this carina 

 merges with the narrow naked area paralleling and 

 forming the posterior margin of the somite. 



The third somite has likewise a low, blunt, faintly 

 grooved carina, narrowest at a point a little in advance 

 of the middle of its length. Posteriorly the carina is 

 wider and more flattened, so that the rather broad sulcus 

 appears to become obliterated. The carinse of the fourth, 

 fifth and sixth somites are high, narrow and prominent; 

 the fifth somite is about one-half the length of the sixth, 

 and the postero-lateral angle of the latter ends in a small 



