356 THE CRUSTACEA. $ 293. 
Chilopoda, also, the ovary is a single long tube, but extends from before 
backwards and terminates by a short oviduct in the last segment of the 
body. The Receptaculum seminis consists, here, of two ovoid capsules, 
sessile or pedunculated, and inserted upon the sides of the extremity of the 
oviduct. Into this last, moreover, just before its termination, long excre- 
tory ducts enter from the two to four Glandulae sebaceae, which furnish 
probably the viscous coating of the eggs,“ 
Tif, Male Crustacea. 
§ 293. : 
The males of the Siphonostoma often differ very much from the females, 
not only as to their external form, but also in their smaller size, — their 
development being arrested at a very early period. On this account, some 
are still unknown, and the organization of others is not understood.” 
With the Caligina, however, they have received more attention, for im 
_ Size they are scarcely smaller than the females. Their posterior abdominal 
“segment, which, usually, is not as large as that of the other sex, has, at its 
extremity, two genital openings, side by side. 
No testicles or excretory 
canals, have yet been observed, but it may be inferred that their external 
form anatheir disposition are analogous to those of the oviducts.® 
But with Dichelestium, the male organs are better known. The two 
spheroidal testichessand the somewhat tortuous Vasa deferentia of these 
& 
Seal, 
esters 
There has been the same pprenen and 
changing of opinion on the subject of tL, Position 
of the external genital openings. Accoi@!ng to 
Treviranus, and Brandt (loc. cit.), they sypould 
be situated, with Judus and Glomeris, at the pcS- 
terior extremity of the body ; but Latreille (Hist. 
Nat. d. Fourmis, 1802, p. 385) had before indicated 
their true position with Polydesmus, and Savi 
(Isis, 1823, p. 217) has confirmed this with Julus. 
Brandt (Recueil, loc. cit. p. 154) has since recti- 
fied his error in respect to Glomeris. But Stein 
has treated with most detail the subject of the geni- 
tal openings with Judus and Glomeris, as well as 
their seminal receptacles (Miiller’s Arch. 1842, p. 
246, Taf. XII. fig. 12, and Taf. XIII. fig. 15. See, 
also, my observations, Ibid. 1843, p. 9). 
19 For the female genital organs of Lithobius 
and §cutigera, see L. Dufour (loc. cit. p. 89, Pl. 
V. fig. 1, 4) who regards the two stalkless Recep- 
tacula seminis of Lithobius as a reservoir of the 
four Glandulae sebaceae, and with Scutigera, as 
the Glandes sébacées themselves. I cannot now 
say whether these last organs are wanting in Scu- 
tigera, or whether they escaped the attention of 
this naturalist. Treviranus (Verm. Schrift. IT. 
p. 28, Taf. V. fig, 8) has very well observed the 
simple ovary with its appendages of Lithobius ; 
but he did not recognize the use of these last. 
Kutorga (loc. cit. p. 8, Tab. I. fig. 5) has not been 
more fortunate with the female genital organs of 
* [§ 293, note 2.] Dana (Caligus, loc. cit. 
Amer. Jour. Sc. XXXII. p. 261, also, Report. 
Crust. &c. p. 1344) has observed, with Caligus, a 
well-formed male apparatus. Here, the testicle 
(and the ovary, also, is the same) consists of a large 
pyriform body of an internal glandular appearance, 
and continuous into a duct extending the whole 
dra. Those of Scolopendra morsitans 
represented by Muller (Isis, 1829, p. 550, Taf. II. 
fig. 5) are probably the male organs, Stein (loc. 
cit. p. 289, Taf. XII. fig. 2,8) has described very 
accurately these organs with Lithobius, and Geo- 
nhilus. This last has two long-pedunculated semi- 
nai receptacles, and only two very long Glandudae: 
sebaceaé.” : 
1 Nordmann (loc. cit. p. 76, &c., Taf. V. VII. 
IX. X.) was the firsi to -discover some of these 
small male Crustacea which are nearly always 
attached to their females in the neighboriiovad of 
the genital openings. He observed them with 
Achtheres, Brachiella, Chondracanthus, and 
Anchorella. But with an individual of the first 
of these genera only, he found in the posterior part 
of the body, four round masses, which perhaps 
may be the internal genital organs. Burmeister 
(Nov. Act. Nat. Cur. XVII. p. 320) refuses to 
recognize these small males for the above-men- 
tioned Siphonostoma, while Kréyer (Natur. 
idskr. 1. Pl. IDL. or Isis, 1840, p. 710, Taf. I. 
Tab. III.) sustains the opinion of Nordmann with 
cogent arguments, and has described and figured 
several of these males belonging to Lernaeopoda 
and Lernaea. See also the description of ‘Chon- 
dracanthus published by Rathké, Nov. Act. Nat. 
Cur. XX. p. 126, Tab. V. fig. 13. 
2See Kroyer, Naturh. Tidskr. [. Pl. VI. or 
Isis, 1841, p. 194, Taf. I. Tab. VI.* 
length of the thorax into the abdomen where it 
passes into the seminal organs. Described more 
particularly, the testicles are rather larger than the 
buccal mass, and are situated just anterior to the 
stomach, in part beneath the base of the prehensile 
legs, and the spine of the preceding pair. — Ep. 
