On new Genera and Species of Millipedes. 427 
Mormyrus psittacus. 
Depth of body 34 times in total length, length of head 4} 
times. Snout very short, strongly curved, hardly as long as 
diameter of eye, which is 44 times in length of head; mouth 
terminal, below the level of the eye, its width } length of 
head ; teeth moderately large, notched, 3 in the upper jaw, 4 
in the lower ; chin slightly swollen. Dorsal 33, originating 
halfway between end of snout and caudal and considerably in 
advance of anal; longest rays 2 length of head. Pectoral a 
little shorter than head, reaching base of ventral; latter 4 
length of head. Anal 23, originating below thirteenth dorsal 
ray; longest rays 2 length of head. Depth of caudal 
peduncle 3 its length. Scales 60 2; 12 scales round caudal 
peduncle. Silvery, dark grey on the back. 
Total length 125 millim. 
A single specimen. 
This species is probably the same as M. discorhynchus, 
Schilthuis (nec Peters). JZ. discorhynchus differs in the snout 
projecting beyond the mouth, the smaller scales (65-70 =), and 
the deeper caudal peduncle (2-24 as long as deep). 
Li.—New Genera and Species of Millipedes of the Family 
Platyrrhachidee from the Indo- and Austro-Malayan Sub- 
regions, contained in the Collection of the British Museum. 
By R. I. Pocock. 
Most of the material upon which this paper is based has 
been acquired by the Trustees of the British Museum, during 
the past ten years, from various collectors, like Messrs. C. Hose, 
A. Everett, and H. N. Ridley, who are resident in the East 
and have kindly forwarded the specimens to the Museum in 
response to an appeal for examples of Millipedes. 
A few of the species here described as new may eventually 
prove to be identical with species established by Peters in 
1864. But without examination of the types the identification 
of Peters’s species is almost impossible, owing to the absence 
of figures and to the fact, recently established by Mr. Cook, 
that in many cases the diagnoses were based upon two or more 
recognizable forms *. 
* On bekalf of collectors unfamiliar with the taxonomy of the 
Diplopoda, it may be explained that the Platyrrhachidz are for the most 
part Millipedes of large or medium size, in which the body is composed 
of twenty segments, each segment, except the first and the last, being 
furnished on each side with a large more or less square and horizontal 
plate which bears the pore. 
29* 
