XIV 



LIST OF ILLUSTRATIONS 



Tethys leporina, .... 3326 



Dendronotus arborescens, . . . 3326 



Phyllirhoe bucephala, . . . 3327 



SEolidia papillosa, . . . 3328 



Elysia viridis, .... 3328 



Limapontia capitata, . . . 3329 



Synapta digitata, with parasitic Ento- 



concha, ..... 3330 

 Larva of Entoconcha, . . . 3331 

 Accra bullata, . , . . 3331 

 Phi line aperta, . . . . 3332 

 Sea Hare (Aplysid), . . . 3333 

 Pleurobranchus peroni, . . . 3333 

 Larva of Pneumoderma, . . . 3336 

 Clione, ..... 3337 

 Cavolinia tridentata, . . . 3337 

 Larva of Cavolinia, ... 3337 

 Gleba cordata, .... 3338 

 Animal of Periwinkle, . . . 3338 

 Textile Cone, .... 3340 

 Black Olive, .... 3342 

 Teeth of Whelks, .... 3346 

 Section of Whelk, .... 3347 

 Animal of Murex, .... 3349 

 Egg Capsules of Purpura, . . 3^49 

 Rhizochilus, .... 3350 

 Helmet Shell (Cassis), . . . 3351 

 Tun Shell (Dolium), . . . 3352 

 Fig-Shell (Pirula), . . . 3353 

 Money Cowries, .... 3354 

 Wing-Shell (Strombus"), . . . 3354 

 Pelican's Foot (Aporrhais), . . 3355 

 Worm-Shell ( Vermetus), . . . 3355 

 Spawn of Periwinkle, . . . 3356 

 Horned Winkle (Lacuna), . . 3357 

 Rissoa, ..... 3357 

 Viviparous Pond Snails, . . . 3358 

 Teeth of Vivipara, . . . 3359 

 Starfish with Thyca, . . . 3361 

 Violet Sea-Snail, .... 3361 

 A Pelagic Heteropod (Pterotrackea}, . 3363 

 Atlanta peroni, .... 3364 

 Fresh- Water Nerite, . . . 3365 

 Dolphin Shell (Delphinula), . . 3366 

 Under Surface of Limpet, . . 3367 

 Common Chiton, .... 3368 

 Larvae of Chiton, .... 3369 

 Eyed Chiton, .... 3369 

 Common Toothshell, . . . 3370 

 Section of Animal of Dentalium, . . 3371 

 Soft Parts of River Mussel, . . 3371 

 Anatomy of River Mussel, . . 3372 

 Left Valve of Meretrix, . . . 3373 

 Right Side of Anomia, with Shell Re- 

 moved, ..... 3374 



Common Mussel Closed and Attached by 



Byssus, ..... 3375 



Common Mussel Opened, . . 3376 



Date Shells in the Rock, . . . 3376 



Pearl Oysters, .... 3377 



Valve and Soft Parts of Common Oyster, 3378 



Margin of Mantle of Pecten, . . 3379 



File Shell in its Nest, . . . 3379 



Large River Mussel, . . . 3381 



Pearl Mussels and Pearls, . . 3382 



A Valve and Soft Parts of Tridacna, . 3385 



Animal and Case of Rocellaria, . . 3386 



Pholas in its Burrow, . . . 3386 



Shipworm and its Larva, . . 3387 



Brechites raginiferus, . . . 3388 



Section of Paludicella, . . . 3391 



Lace Coral (Retepora), . . . 3392 



Lepralia, . . . . 3393 



Sea Mat (Flustra), . . . 3394 



Ttibulipora verrucosa, . . . 3395 



Cristatella and Young, . . . 3396 



A Fixed Moss Animal, . . . 3397 



Back Valve of Terebratulina, . . 3399 



Development of Tkecidium, . . 3400 



Thecidium mediterraneum^ . . 3401 



Upper Valve and Animal of Crania, . 3402 



Isingula pyramidata, . . . 3402 



Group of Bristles of an Annelid, . . 3404 



Parapodium and Bristles of Annelid 



(Heteronereis), 3405 



Sea Mouse (Hermione), . . . 3406 



Head of Nereis, .... 3406 



Various Annelids, .... 3407 



Arenia fragilis, .... 3408 



Chtztoptertis, .... 3409 



Tubeworm (Hermella), . . . 3409 



Common Serpula, . . . . 3410 



Sabella, ..... 3410 



Common Earthworm, . . . 3411 



Phreoryctes menkeanus, . . . 34 11 



Beaked Nais, .... 34 12 



Myzostoma gig-as, . . 34 X 3 



Common Leech, . . . 34 X 4 



Structure of Leech, . 34 r 5 



Rock Leech, .... 34 l6 



Gephyrean Worms, . 34 : 7 



Four-Horned Rotifer, . - 34 r ^ 



Flower Animalcule, . 34 I 9 



Spiny-Headed Threadworm, . 3421 



Front End of Threadworm, . 3421 



Development of Threadworm, . . 3422 



Vinegar-Eel, . . 34 2 3 



Rhabditis and Rhabdonema, . 3423 



Humblebee Threadworm, . 3424 



Human Roundworm . . . 34 2 5 



