LIST OF SPECIES. 
Page 
IV. CENTRONIX 1 
1. ECHINODERMATA... 1 
Class I. DITREMATA ... 1 
Order I. ECHINIDA ... 2 
Fam. 1. Cidarid.e 2 
1. Cidaris 2 
1. papillata 2 
Fam. 2. Echinidaj 2 
1. Echinus 3 
1. Flemingii 3 
2. esculentus 3 
3. railiaris 3 
4. lividus 4 
5. n. s 150 
2. Echinometra 4 
1. Drobachensis 4 
Fam. 3. Scutellid.e... 4 
1. Echinarachnius 4 
1. placenta 5 
2. Echinocyamus 5 
1. pusillus 5 
Fam. 4. Spatangid.-e... 5 
1. Spatangus 3 
1. purpureus 0 
2. Echinocardium 6 
1. cordatus 6, 150 
2. ovatum 6 
3. Brissiopsis 7 
1. lyrifera 7, 150 
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Order II. HOLOTHURIDA. 7 
Fam. 1. Holothurid.e... 7 
1. Thyone 7 
1. fusus 7 
2. Raphanus 8, 150 
2. Holothuria 8 
1. nigra 8 
Fam. 2 Cuvieriadaj... 8 
1. Psolus 8 
1. phantopus 9, 150 
2. Psolinus 9 
1. brevis 9, 150 
Fam. 3. PentactiDvE... 9 
1. Pentacta 9 
1. frondosa 9 
2. fusiformis 10 
3. Hyndmanni 10 
4. lactea 10 
5. pentactes 10 
6. Montagui 11 
7. Neillii 11 
8. dissimilis 11 
2. Thyronidium 11 
1. pellucidum 11 
2. Drummondi 11 
Fam. 4. Synaptida!... 12 
1. Synapta 12 
1. inherens 12 
2. Henslowana 12 
