THE GASTROPODA 179 
a ee 
cenidosacs are found in the integuments ; e.g. Pseudovermis paradoxus 
(Fig. 169). 
Famity 1. Eoutprpax, d’Orbigny. Dorsal papillae spindle-shaped or 
club-shaped, each ending in an open sac of endodermic origin which 
communicates with a hepatic caecum and contains nematocysts. Genera 
—Folis, Cuvier ; the anterior angles of the foot prominent ; rhinophores 
smooth ; dorsal papillae compressed; British 
(Fig. 160, A). Facelina, Alder and Hancock : 
rhinophores foliated; radula 
triserial ; British. Tergipes, 
Cuvier ; rhinophores'simple ; 
radula uniserial ; dorsal pa- 
pillae in a single row on 
either side ; otocyst with an 
otolith ; British. Gonzeolis, 
Bergh; no eyes. Cuthona, 
Alder and Hancock. Emble- 
tonia, Alder and Hancock. 
Galvina, Alder and Hancock. 
Calma, Alder and Hancock. 
Hero, Loven; a frontal 
velum; rhinophores simple; 
dorsal appendages in umbel- 
liform clusters. Faminy 2. 
GLAUCIDAE, Gray. The 
body furnished with three 
pairs of lateral lobes bearing 
the tegumentary papillae ; Fic. 165. 
foot very narrow ; free- Sagittal section of a 
5 2 3 dorsal papilla of Holis. c.s, 
swimming pelagic forms. enidocystie sac; d, duct 
al A ay . : of junction between the se eats 
Genus — Glaucus, Forster. Re autic cast soccer Fic. 166, 
RVAQE TEs 5) Jalon DYLIDAE, eect sac ; @, oper Evaginated ecnidocyst 
. nal epithelium; i.c, hep- from Eolis punctata, x 500. 
Bergh. Body elongated > atic caecum. : (After Vayssiére.) 4 
the visceral mass marked 
off from the posterior part of the foot; dorsal tegumentary append- 
ages absent or reduced to a single pair; spicules developed in the 
integument. Genus— Hedyle, Bergh (Fig. 168); from the Black Sea, 
Sea of Marmora, Mytilene, Flores. Fammy 4. PSEUDOVERMIDAE, 
Pelseneer. Head devoid of tentacles; body elongated ; the anus on 
the right side. Genus— Pseudovermis, Periaslavzeff (Fig. 169); from 
the Black Sea and Mytilene. Famity 5. Procronotmar, Alder and 
Hancock. Anus situated posteriorly in the median line of the back ; 
anterior tentacles atrophied; foot broad. Genera — Janus, Vérany ; 
a median crest between the rhinophores ; British. Proctonotus, Alder 
and Hancock ; no intertantacular crest ; British. Famtty 6. Doronrpak, 
Adams. Bases of the rhinophores surrounded by a sheath; dorsal 
papillae club-shaped and more or less tuberculated, arranged in a single 
row on either side of the dorsum ; no enidosacs. Genera—Doto, Oken ; 
a frontal veil; British. Gellina, Gray ; no frontal veil. Heromorpha, 
