430 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Myriopods from the summit of Mount Euraney, Hobart, Tasmania, 

 " which completely falsified the opinion that the Antipodes hold nothing: 

 peculiar or primitive in tbe way of centipede-life, and are wholly given 

 over to the occupation of widely distributed and well-known forms. 

 The collection in question contained a couple of centipedes representing 

 a species which proves to be comparable in interest, from a morphological 

 standpoint, to either of its compatriots, Ceratodus or Ornithorhynchus, 

 inasmuch as it unmistakably represents an archaic type which has sur- 

 vived in this isolated corner of the world — a type which possesses the 

 twofold interest of exhibiting certain unique structural peculiarities of 

 its own, coupled with others that serve to link together three of the 

 best-known and most diversified sections of the class; and also of 

 showing the true, but previously unknown and unsuspected, nature of 

 the connection between the metamerism of the Scolopendromorpha and 

 that of the Lithobiomorpha." 



After describing the new Centipede — Craterostigmus g. n. — and com- 

 paring it with existing orders, Mr. Pocock explains its significance in 

 testifying to the transformation of the Scolopendroid into the Lithobioid 

 type. " It may be stated with confidence, and without fear of contra- 

 diction, that the true nature of the connection between the metamerism 

 of the Lithobioid and Scolopendroid types would never have been 

 guessed had it not been for the fortunate survival of this intermediate 

 form, with the six additional somites of the last-named type in process 

 of excalation." 



The interesting and important essay concludes with a discussion of 

 the general characters and classification of the Chilopoda. The classifi- 

 cation may be summed up : — 



Sub-class Pleurostigma 



Order 1. (ieophilomorpha 



Geophilidae, Oryidae, &c. 

 Order 2. Scolopendromorpha 



Scolopendriidae, Newportiidre, &c. 

 Order 3. Craterostigmorpha 



Craterostigmus 

 Order 4. Lithobiomorpha 



Lithobiidae, Hemiopidae, and 

 Cermatobiidae 

 Sub-class Notostigma 



Order Scutigeromorpha 



One family ScutigeridaB. 



5. Arachnida. 



Development of Admetus pumilio Koch.* — L. H. Gough has been 

 able to study some stages in the development of this Pedipalp. On 

 the whole the development of the Pedipalps follows the types seen 

 among other Arachnids, sometimes leaning towards one, sometimes 

 more towards another. 



It resembles that of spiders — in the first cleavages (probably), in 

 the egg-envelopes, in the general build of the blastoderm, in the de- 



* Quart. Journ. Micr. Sci., xlv. (1902) pp. 595-630 (2 pis.). 



