ANATOMICAL NOMENCLATURE. 129 
not proved, and it is possible that the male sometimes applies the genital 
bulbs to the sexual aperture, and thus charges them with the 
fertilizing fluid, a fact which Menge seems to suspect may be 
the case with Lycosa rurestris.! That this transfer is so seldom 
observed, and by so few persons, will not excite wonder on the part of one 
who has devoted much time to the study of the habits of these reticent 
creatures, and who knows the difficulty of obtaining a complete observation 
of even the most common of its habits. Possibly the extrusion of the 
sperma by the male upon the little silken receptacle from which it is 
absorbed into the palps takes place very rapidly; or it may be done long 
before the act of fertilization; perhaps, as Thorell suggests, immediately 
after the last change of the skin. ¥ 
The Cymbium is that part of the modified digital joint of the male 
spider’s palpus upon which is placed the copulatory apparatus which it 
sustains. In many species of Orbweavers it covers one side of 
the digital, having ay 
the appearance of the ( 
half of a seed husk, or shell of 
grain, and is covered more or 
less thickly with hairs and 
bristles. (See Fig. 98, cym.) 
The alveolus (alv) is the 
concavity in the cymbium 
within which is located the 
Transfer 
of Sperm. 
Cym- 
bium. 
copulatory apparatus proper. Nl ~~ haem 
Its form depends upon the’ AY 
structure of the eymbium, with x is 
: seed j aly: : 
Bicones certain spiders occu ae aly 
> VS, half of the sur- 5... 9 Digital joint of palp of a male spider (after Wagner), 
face, in which ease the cym- schematic longitudinal section of the cymbium with the copu- 
: latory apparatus drawn out; emb, embolus; teg, tegulum; 
bium has the form of & canoe, mea.san, meati sanguinis, minute ducts for conducting blood 
With others it is smaller, as from the hematodocha (hem) into the receptaculum semi- 
. ] g ED f ] ; nis, rec.sem; the arrows indicate the course of the blood; 
wit 1 egestr 1a, or examp e; gla.cl, glandular cells; aly, the alveolus or hollow of the cym- 
with others again larger and _ >bium in which the apparatus rests. 
occupying the whole surface of the cymbium. The simpler the structure 
of the apparatus the less is the alveolus in circumference and depth, and 
vice versa. The more complicated is the apparatus the more space it 
embraces in every sense. 
The alveolus serves as a seat for the Hematodocha (haem), a follicule 
placed in the form of a spiral, and intended with some spiders to serve 
as a seat for the copulatory apparatus itself. The alveolus has no inde- 
pendent significance ; its form and size in its development are dependent 
1 Lebensweise d. Arach,, page 43. 
