80 REPORT—1849. 
any other style the author is acquainted with. Moreover it is a style which most 
readily admits of being rectified wherever it is observed to be defective, as the 
drawing is uninjured by laying one colour over another to any extent thought needful. 
Third. Placing plate glass before the picture gives both the brilliancy and softnessof 
varnish on the surface. } 
The last suggestion mentioned relative to pathological delineation is, that while the 
drawing is in progress, the morbid specimen should be kept under a glass dome or. 
roof; the latter, of a prismatic form, was preferred, from its not reflecting surrounding 
objects. The escape of any infection or unpleasant effluvia is thus prevented. Be- 
sides which, this plan preserves the part from the dryness and corrugation which soon 
take place from exposure to the atmosphere. 



On the Luminosity of the Sea on the Cornish Coasts. By C. W. Pracn. 
The author described the state of the weather at the time of observation, comparing 
it with that which occurred soon after, as well as the animals observed on those occa- 
sions. He exhibited drawings of many—some new to the British coasts,—one at least 
of which has been found in the Mediterranean. These were abundant in July, but 
were destroyed by a heavy gale of wind, since which they have not been noticed ; 
they belong to the Diphyidiz. The author had a long list arranged in a tabular 
form of the animals, state of weather, date and hour of observation, the amount of 
luminosity, &c. ; but only gave a list of animals observed, with a table of the number 
of observations made in five years, and the changes of weather that took place soon 
after. 
VERY LUMINOUS. 
When the weather has changed suddenly 


from fine to wet with gales of wind, and When it continued fine. 
at times tempestuous, with lightning, &c. 
Ale enustesansee Seaspareeanaas. Li pheeckeste aS ene onpcnesmaennenal 
GRU s ccaecscneas car catecnecacan 1 
TBE ccasstcneicensnae tes imee ces Sl gassed Kiasecas Rasisinaisislp Bensen 2 
DSA. ccsantscencearee ees Wet thos enaptnaensn sks «ps ccpaneaure a 
LES A abet SS a ae ee acenexe 3 
List or OnsEcTS OBSERVED. 
Gasteropoda. 
Young of Eolis. 
Tunicata. 
Tadpole of Botryllus. 
Cirrhopoda.. 
Young of— barnacles and cast skins of. 
Crustacea. : 
Opossum Shrimp; Zcea; Oniscus ceruleatus; Polyphemus; Cyclops; Cypris. 
Annelida. 
A small swimming Annelid. 
Zoophyta. 
Laomedea, &c. 
Acalephe. 
Willsia stellata. A new one. ; 
Saphenia dinema. Several other objects, much like the young | 
‘Sarsia prolifera. of Zoophytes. 
Thaumantias octona. Benue 
inconspicua. ee 
Bouganvillia nigritella. Diphyidiz, probably Cuboides vitreus, and 
Lizzia blondina, one something like Calpe pentagona, 
Lizzia octopunctata. both new to the British seas. 

