HYGROMIA STRIOLATA, +) 
The MUSCULAR SYSTEM shows a broad undivided muscle to the BUCCAL BULB; 
the TENTACULAR RETRACTOR divides near tle common base of attacliment to the 
columella into two broad muscular straps, the retractors of the right and left 
tentacles, each of which a little beyond the half-way divide into slips for the upper 
and lower tentacles of their respective sides, and also each give off a broad slip, 
which becomes split up into strands to the anterior part of the foot. 
BirGe Se Fic. 9. Fic. 10. 
Fic. 8.—Retractors of //ygvomla striolata, showing the columellar, the buccal, the tentacular and 
anterior pedal muscles, highly magnified (after a dissection and drawing by Miss M. V. Lebour). 
Fic. 9.—Alimentary system of //ygromia striolata, showing also its relationship with the heart 
and the kidney, x 3. 
6. buccal bulb; 6.d. bile ducts 3 cv. crop; /. heart ; %. kidney 3 s.g. salivary glands ; st. stomach. 
Fic. 10.—Reproductive organs of Hygromia stviolata, x 3. 
ag. albumen gland ; d.s. dart sacs ; ef. epiphallus ; 7. flagellum 3 7z.g2. mucus glands ; of. ovo- 
testis 5 ow. oviduct ; p- penis-sheath a) el penial retractor; sf. spermatheca. 
The REPRODUCTIVE ORGANS display an elongate OVOTESTIS, with a much con- 
voluted duet; the VESICULA SEMINALIS or claw is unusually well developed, and 
shows clearly as a doubled channel, it is lanceolate, and sometimes bilobed at its 
extremity ; the ALBUMEN GLAND narrowly linguiform and amber coloured, palest 
on the concave face; the PROSTATE or sperm-duct is thick and creamy-buff in 
colour ; and the OvIDUCT has the usual sacculations ; the FREE OVIDUCT or vagina 
gives off the thick, white, and very elongate SPERMATHECA DUCT, the oval terminal 
VESICLE being of a pinkish-cream or ochreous tint, with anastomosing brown 
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Fic. 12. Fic. 13. Bic. 14° 
Fic. 11.—Distal part of the reproductive organs of H/ygromia striolata, showing the natural 
position of spermatheca and convolutions of hermaphrodite duct (greatly enlarged). 
Fic. 12.—Vesicula seminalis or claw of H/ygromia striolata (greatly enlarged). 
Fic. 13,—Bilaterally paired dart sacs and mucus glands of //ygromia striolata, X 3. 
v. vagina and dart sacs; v.g2. vaginal glands; /.s. penis sheath. 
Fic. 14.—Penis-sheath of //ygromia striolata, laid open to show the intromittent organ, x 12. 
?. intromittent organ; #.s. penis sheath; ~. retractor; v.d. vas deferens. 
streaks, and attached to the middle of oviduct. The stout and rigid MUCUS- 
GLANDS are usually eight in number, and arranged in pairs ; they are about 3 mill. 
long, somewhat irregularly digitate, with usually a noticeable constriction near the 
centre; they are occasionally bifid and even trifid at the extremities, and show 
