186 REPORT—1843. 
APPENDIX No. II. 
Brief Diagnoses of new species of Mollusca named in the preceding tables. 
The new Radiata are described in the Linnzean Transactions. 
Order NuCLEOBRANCHIATA. 
Genus Lapas, Cantraine. 
Ladas planorboides, sp. nov. 
L. testa pellucida, alba, levi, compressa, carinata, exalata, anfractibus 4. 
Diam. Oy;- Reg. VIII. (frequent.) 
Genus Peracte, Forbes. 
(I propose this genus for certain small reversed, spiral shells, having the 
aperture more or less prolonged into a pointed canal. Fuller details will be 
given elsewhere.) 
Peracle physoides, sp. nov. 
P. testa ovata, alba, pellucidé (epidermide? reticulata); cauda longa, 
arcuata, acutissima. 
Long. 0-/5- Reg. VIIf. Cyclades, Lycia. 
? Bellerophina minuta. 
I have enumerated among the Nucleobranchiata a shell under this name, 
which I have now good reason to believe is the shell of the larva of (perhaps 
many) species of several orders of Mollusca. It is extremely minute, helicoid, 
transparent, and of two or three whorls. It abounds in the mud from very 
deep water. 
GASTEROPODA. 
Order NuDIBRANCHIA. 
Fam. Doride. Genus Doris, Lin. 
Doris aurata, sp. nov. 
D. corpore ovali, convexo, levi, succineo, maculis stellatis albis ; branchiis 
5—6, flavidis; tentaculis aurantiacis apicibus flavis; pede flavo. 
Long. 02 unc. Hab. 50 fathoms. Paros (Lieut. Mansell), 
Genus Gonroporis, Forbes. 
Goniodoris regalis, sp. nov. 
G. corpore elongato, lanceolato, plano, levi; dorso viridi, longitudinaliter 
flavo-vittato, albo-marginato; lateribus griseis flavo-maculatis; pede atbo ; 
branchiis 10—12, viridibus, flavo-marginatis ; teutaculis azureis. 
Long. 4 une. Hab. Littoral. Port Massini, Skanousi. (Lieut. Freeland.) 
Goniodoris tenerrima, sp. nov. 
G. corpore cuneato, alto, dorso lateribusque griseis lineis interruptis albis 
ceeruleisque pictis ; margine flavo ; pede angustissimo albo ; branchiis 10— 
12, griseis, pedunculatis ; tentaculis azureis. 
Long. 3 unc. Hab. 4 miles from Paros in 40 fathoms, weedy ground. 
Goniodoris vivida, sp. nov. 
G. corpore subquadrato cceruleo, dorso fascia centrali alba, albo marginato ; 
branchiis 7, cceruleis. 
Long. 0,3, une. Hab. 7—30 fathoms, weedy ground, Cyclades. 
Fam. Melibeade. Genus Metisa@a, Rang. 
Melibea? minuta, sp. nov. 
M. corpore oblongo, flavido, lateribus in branchiis binis rotundatis lobi- 
formis productis. 
Long. 07;- Hab. 5 fathoms. Despotico. 
