Order I Acaleto^ — V. 30. — Meaning of the term ? What \a 

 said by Owen f What of their structure ? Their distribution ? 

 Peculiarity of Dipht/a f Of Phi/salia ? Of Velclla ? Wiiere taken ? 

 Size and form of Cydippaf Meaning of Ciliogrades? Of Bcriie ? 

 Their movements ? Tcntacula and their uses ? Tlieir food ? 

 Their vitality ? What is said of a different species ? How many 

 species of Medusae or jelly-fishes? What differences do they 

 exhibit ? How do they move ? How do they breathe ? Clean- 

 ing of rulmonigrades ? Size ? Colours ? Stnicture of lihizoitoma 9 

 Of Cyanea f Ovaries of Ct/anea ? Growth of the young ? Describe 

 its changes. Give proof of the small quantity of solid matter in 

 a Ci/dippe. In a Medusa. Phosphorescence of AcaUphce. Lumi- 

 nosity of the sea — to what owing ? Cause of colour in the Green- 

 land Sea? Scoresby's calculation of their numbers? State tho 

 concluding observations. 



Order IL Echinodermata.— P. 42.— Meaning of the term? 

 Where do animals of this class live ? How are the yonng pro- 

 duced ? By what means are they diffused ? Wliat changes do 

 they undergo ? What is said of the Crilella? What of the siiiii- 

 larity or dissimilarity in the appearance of the animals of this 

 group ? Into how many families are they divided ? 



First Family. — Meaning of Crinoidece? Their English apjiclla- 

 tion? Were they more or less abundant fonnerly than now? 

 What English names have been given to the detached verte- 

 bra? What opinion prevailed prior to 1823 respecting these 

 animals? What was announced in 1826? By whom ? What 

 observations were made in 1840? How many arms has this 

 species? What is its colom*? What tinge does it impart to 

 fresh water ? 



Second Family. — Meaning of Ophiuridce? English appellation, 

 and why given ? What is their size ? What is said of a species 

 of Ophiura? 



Third Family. — Derivation of Asieriadce? Describe the " Five- 

 fingers." Exjjlain the use and mode of employing the suckers. 

 What occurs if an arm be broken off ? What opinion do oyster- 

 fishermen hold respecting it ? How does it appear to overpower 

 the oysters ? What specific name has been applied to a species 

 of Luidia? Explain why this name is appropriate. 



Fourth Family. — What is meant by Fchinidcef What is the 

 general form of these animals ? How do they move ? How i.s 

 the " shell " or covering enlarged ? How many suckers have bec-r , 

 estimated in a sea-urchin of moderate size ? How many spines? 

 How is respiration effected ? What took place when one was cut 

 in two ? What is meant by the " lanthorn of Aristotle" ? What 

 does Professor Jones say of these jaws? Describe the appearance 

 of a boring species. 



Fifth Family. — The scientific name ? The English name? ITow 

 do they move ? What is said of their power of reproducing lo.'-t 

 parts ? To what use have they been applied ? What English 

 name was given to a Cornwall species ? 



Sixth Family. — What do these animals reseniMe? Where are 

 they found ? What docs Professor Forbes remark of the British 

 species of this order ? 



