DR A. WILLEY IN THE LOYALTY ISLANDS, NEW BRITAIN, ETC. 67 



(b) Pleurae of prehensorial feet almost entirely covered by the basal plate ; claws 

 of anterior legs very stout, the distal half bent at right angles to the basal 

 half, sometimes with a process running out from the base to the apex ; number 

 of legs $ 123; length of $ 43 mm hamatus, sp. n. New Britain. 



Class. DIPLOPODA (Millipedes). 

 Order. POLYDESMOIDEA. 



Family. Platyrrhachidae. 

 Genus. Acisternum, Silvestri. 

 Ann. Mus. Genova, xxxvr., p. 191, 1896. 



(13) Acisternum flavisternus (Poc). 



Max Weber's Zool. Ergebnisse, ill., pt. 2, p. 346, pi. xix., fig. 16. 

 Loc. Tjibodas in Java. 



The type specimens of this species were also obtained at Tjibodas. 



In the synoptical table of the species of Platyrrhachidae taken by Max Weber 

 (loc. cit, p. 344) it is stated with regard to this species, " Sternal areas unarmed." 

 This is an error ; for the sternal areas in the fore part of the body, that is from 

 segments 3 to 10, are armed with tuberculiform spines. These are fairly strong on the 

 4th and 5th segments, but decrease in strength posteriorly and practically die out at 

 the posterior end of the body. In Acisternum monticola, Poc, the type of the genus, 

 the sternal spines persist to the posterior end of the body, though they become very 

 small. 



Parazodesmus, gen. nov. 

 PI. VI, Figs. 3—3 b. 



First tergite broadest across the middle, where it is furnished with a depressed 

 rectangular keel. 



Keel-bearing portion of the other segments covered, but not very closely, with rounded 

 tuberculiform granules. Three rows of tubercles conspicuous, those of the anterior row 

 as large as those of the posterior. Keels of medium size, depressed, anterior border 

 basally shouldered and, like the posterior border, granular, lateral border tri- or quadri- 

 tubercular, posterior angle produced but not spiniform. 



Pore dorsal, behind the middle of the keel, and about equidistant from the lateral 

 and posterior borders. Caudal process with margin convex and lightly notched. Sternal 

 plate with two tubercles. Sterna granular, not spined. Copulatory feet with basal portion 

 straight, apical portion strongly curved upwards towards the sternal process and giving 

 off five slender processes, four long and one short. 



This new genus is very nearly related in many of its features to Zodesmus, of 

 which the only known species is tuberosus, Poc, from the Ki Islands (Arm. Mag. Nat. 

 Hist. (6) XL, p. 131, pi. IX., figs. 3, 36). The two may be distinguished as follows: — 



10—2 



