54 Mr. J. Wood-Mason on Scolopendrella. 
upon them the genus Scolopendrella. This preliminary notice 
was followed in 1844* by a description with figures of the 
species under the name of S. notacantha, which description 
and figures were in 1847 f repeated in the ‘Suites a Buffon.’ 
A second species was not long afterwards described and 
figured, from specimens obtained near London, by our own 
countryman Newport }, who at first thought the genus allied 
to the Chilopodous Geophilus, but eventually placed it in a 
family by itself between Lithobius and Scolopendra, notwith- 
standing that the fourth somite and its appendages are not 
developed into the basilar plate and poison-claws so charac- 
teristic of Chilopoda. 
In 1851 a memoir §, which is far the most complete of any 
that have as yet appeared, was published by Menge on New- 
port’s species S. ¢mmaculata. This author, who discovered 
the silk-glands that lie in the last two somites and open at the 
ends of the caudal appendages, as well as the trachee (which 
he did not, however, correctly interpret), and several other 
structural features of importance, regarded the genus Scolopen- 
drella as “ the type of a genus or family intermediate between 
the hexapod Lepismide and the Scolopendride ;” but he re- 
frained from making a new name. 
Lubbock ||, Huxley §, and others have briefly referred to 
the genus. 
I myself in 1876 ** recorded its occurrence in Bengal, and 
in 1879 {} published a few observations upon it and figured 
one of the legs. 
In 1880 {{ Mr. J. A. Ryder recognized in it “ the last sur- 
vival of the form from which insects may be supposed to have 
descended,” and proposed for its reception ‘the new ordinal 
group Symphyla, in reference to the singular combination of 
Myriapodous, Insectean, and Thysanurous characters which 
it presents ;” and in 1881 the same writer monographed the 
* Ann. d. Se. nat. Zool. tom, ii. 1844, p. 70, pl. v. figs. 15-17. 
+ Walckenaer et Gervais, Ins. Aptéres, t. iv. pp. 301-3803 (1847). 
¢ Trans. Linn. Soc. Lond. vol. xix. pp. 373, 374, pl. xl. figs. 4, 4a, 
b, c; and Cat. Myr. Brit. Mus. 
§ “Myriapoden d. Umgegend y. Dantzig,” in Neueste Schr. d. natur- 
forsch. Gesellsch. in Danzig, iv. 4tes Heft. 
|| ‘Monograph of Collembola and Thysanura.’ 
€ ‘Anatomy of Invertebrated Animals.’ 
** Proc. Asiat. Soc. Bengal, August 1876. 
++ “Morphological Notes bearing on the Origin of Insects,” in Trans. 
Ent. Soc. Lond. 1879, p. 158, fig. 2, B. 
tt Amer. Nat. May 1880. The number of this publication for Septem- 
ber of the same year contains a note on Ryder’s communication, with 
some figures and suggestive remarks on S, emmaculata. 
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