CRUSTACEOLOGY. 



407 



Crustacea. 



Variega- 

 i us. 



7fi. Glo- 



xtais. 



Pastulata. 



Oniscus armadillo of Linne and Cuvier ; Armadillo 

 vulgaris of Latreille. 



Inhabits the roots of trees and rocks all over En- 

 rope. 



Oniscus chtcreus of Panzer is merely a variety of this 

 species. 



Its vulgar name is Pill millepied. 



Sp. 2. Variegatttt. Segments black, margined with 

 white; back variegated. 



On? cus variegatus of Villers, Armadillo variegalus 

 of Latreille. 



Oniscus pulchcllus of Panzer, (Fn. las. Germ. fasc. 

 62. fig. 21.) seems near akin to this species. 



Family XX. Julides. 



Genus LXXVI. Glomeris. Antennae inserted on 

 the upper anterior margin of the head ; the two basi- 

 lar joints small ; the sixth, including the last, very 

 large. Body oblong-oval, convex above, arched be- 

 neath, capable of contracting into a ball ; the first seg- 

 ment very narrow, being merely a semicircular lamel- 

 la ; the second larger than any of the others ; the last 

 semicircular. 



* Feet on each side sixteen. 

 Marginata. Sp. 1. Marginal a. Body black above, the margins 

 of the segments of a dirty orange yellow. 



Inhabits Britain, France, and Germany, under 

 stones. 



Oniscus marginatus of Villers, Oniscus zonalus of 

 Panzer, Cloporte horde of Olivier, Glomeris limbaia of 

 Latreille, Julus ouiscoides of Stewart. 



Sp. 2. Pustulata. Body black above, spotted with 

 red. 



Inhabits the southern parts of France and Germany. 



Oniscus pustulutus of Fabricius; Oniscus armadillo 

 of Scopoli. 



** Feet on each side twenty. 

 Cryxus, Leach's MSS. 



Sp. 3. Ovalis. Body dirty yellow. 



Inhabits the ocean. 



Ju/us ovalis of Linne, Julus ovatus of Fabricius, 

 Glomeris ovalis of Latreille, Cryxus ovatus, Leach's 

 MSS. 



It is surprising that Latreille should have placed this 

 species in the genus Glomeris : though we had never 

 seen the animal, the description and figures would al- 

 most have justified us for entertaining this opinion ; its 

 economy, the number of legs, at once exclude it alto- 

 gether from this genus ; which, in Mr Leach's manu- 

 scripts, as above quoted, is considered as a distinct genus. 



Genus LXXVII. Julus. Antennae inserted in the 

 anterior margin of the head ; the second joint longer ; 

 the sixth, including the seventh, (which is very mi- 

 nute), shorter than that which precedes it. Body cy- 

 lindrical, elongate, serpentiform, the segments rarely 

 marginated. Eyes distinct and granulated. (The se- 

 cond and third segments of the body often bearing but 

 one pair of feet.) See Plate CCXXI. Yig. y. 



* Body not marginated or laterally depressed. 



Sp. 1. Terrestfis Feet 6 !• to 74 pairs ; back cine- 

 reous, with light brown annuli; the last segment point- 

 ed. Lilr. Gen. Crust, et Ins. torn. i. p. 75. 

 Inhabits Europe. 



Julus terrcstris of Latreille, who describes it as ha- 

 ving 64 or 74 pair of legs ; Linne, Fabricius, and De- 



Ovalis. 



77. Julus. 



Pl*tf 

 CCXXI. 



Kg. 9. 



Termtris. 



geer, mention 100 pair of legs as proper to this spe- Crustacea 

 cies. We have never seen this animal, therefore can —~y— «■» 

 give no opinion on this point ; although it is probable, 

 from the above remark, that two species have been con- 

 founded j future observation must however decide this 

 point. 



Sp. 2. Niger. Body black, legs pale, from S8 to <)5 Niger. 

 in number, (or perhaps more) ; the hinder part of the 

 segment longitudinally streaked; anus pointed. 



Inhabits Britain, under the bark of decaying trees, 

 or under stones and moss. 

 Julus niger, Leach's MSS. 



This species, when alive, is black, although it some- 

 times, though rarely, occurs of a brownish black co- 

 lour. After death it generally changes to blue, having 

 the margins of the segments brown or yellowish, with 

 a row of black spots along the sides of the body. It 

 is by far the most common species in the neighbour- 

 hood of Edinburgh. 



Sp. 3. Sabulosus. Back greyish-black, with two Ion- Sabulosus. 

 gitudinal reddish lines ; the last segment pointed. Feet 

 95 pair. 



Inhabits Europe ; is common in this country under 

 stones, and on the bark of trees. 



Julus sabulosus of Linne, Fabricius, and Latreille. 

 Sp. 4. Maximus. Feet on each side one hundred and Maximui. 

 thirty-four. 



Inhabits America. 



Julus maximus of Linne and Fabricius. 

 Sp. 5. Fuscus. Feet on each side one hundred and Fuscui. 

 twenty- four ; back brownish. 

 Inhabits India. 



Julus fuscus of Linne and Fabricius. 



Sp. 6. Indus. Feet on each side one hundred and Indus, 

 fifteen ; body rust coloured, the last segment pointed ; 

 feet yellowish. 

 Inhabits India. 



Julus Indus of Linne and Fabricius. 

 Obs. There are several species, or varieties of JulL 

 belonging to this subdivision, which inhabit this coun- 

 try, but the marks by which they are distinguished are 

 not sufficiently known to enable us to give an account 

 of them. Much remains to be done in this depart- 

 ment, and it would prove highly beneficial to science, 

 were naturalists to breed, from the young state, the 

 various species of these Juli, and mark the changes 

 produced in the animal during its growth, as colour, 

 formation of new feet, &c. Until this lias been done, 

 nothing can be added to this genus without great un- 

 certainty. 



** Body more or less marginated, or laterally com- 

 pressed. Genus Craspeoosoma of Leach. 



Sp. 7- Raulinsii. Body blackish ; back with two Raulineii. 

 light red longitudinal lines ; head black ; feet and bel- 

 ly reddish-white ; side somewhat marginated, or rather 

 compressed ; back with one longitudinal sulcus. 



Inhabits Scotland, under stones and in decaying 

 trees. 



Craspedosoma Raulinsii. Leach's MSS. 

 Discovered by a very assiduous entomologist, Richard 

 Rawlins, Esq.* under stones near Edinburgh, where 

 it appears to be pretty common ; it has since been ob- 

 served under the bark of decaying willow trees and 

 moss, near ltoslin and in Ravelston wood. 



Sp. 8. Polijdcsmoides. Body considerably depressed ; Polydes- 



moides. 



* We have now most sincerely to lament the premature death of this gentleman, who, had he survived, would have proved one of 

 the greatest ornaments in the department of Zoology including the animals without vertebrae that has ever appeared in this country. 

 His industry and acquirements were truly astonishing, and his zealous ardour remained to his last moments. 



