ON ZGEAN INVERTEBRATA. 133 
found at a depth as great as fifty fathoms. Of the allied genus Goniodoris 
several very beautiful species were obtained. The characteristic Nudibranc 
of the Mediterranean, a giant among its tribe, Tethys leporina, was only met 
with once, swimming foot up on the surface of the sea in the Gulf of Smyrna, 
in an exhausted state, its sides being infested by that extraordinary parasite 
the Vertumnus tethydicola. Out of fifteen species of Nudibranchia taken 
in the Aigean, three are certainly, and four probably identical with species 
inhabiting the coast of Great Britain, living at similar depths and under 
similar circumstances. 
Nudibranchia. 

Ground. Locality. Geographical 
Range. 









5 ‘| fathoms. 



coccinea, Ford...cseclecsess|esceeeees| 30-45 weedy Syra, Naxia. {Med., Celt. Seas. 
testudinaria 2, Cuv.|.c..s.Jesceeeee.| dit. rock, Lycia. Celtic, North. 
ANZO, Lins. rccocrerses|ecseeeleccecseces| lit. rock Lycia. : 
aUirata, For Deeceesseeferseer|ssseceeee| 50 — [resccseeescesesvenreeees|CYClades: 
Pilosa, Mul. ...cccsss|eeveesfecsceeee| 13 weedy. Cyclades. Med., Celt., N.S. 
Goniodoris, Forb. ...| ? 4 
gracilis, Rupp.cecccsieceserfecsseeeee} 40 weedy Cyclades. 
Vivida, FOrb....erecsleceeesleseserses| 8-28 weedy Cyclades 
tenerrima, Ford, ...|ssseelsecseeeee| 40 weedy. Cyclades 


cenceeccsecscecesoeesees|SKANOUSI. 
regalis, Ford. sessssJececes|eeceeesee) lite 
Tethys, Lin.....s0..00+ 
leporina, Lin. ......{eceess|eesereees| pelagic. 
Tritonia, Cuv. sesveeses 
plebeia, Johnst...... 
Scyllea, Lin. secre 
pelagica, Lin. ......|sceessleccevones 4 
Meliboea, Rang ...... 
G. of Smyrna. |Mediterranean. 
Sec eeeeeetsteesescesnees 
seesesess| 25 {mud and corallines.|G. of Smyrna. |Med., Celt. Seas. 
zostera. Milo. Mediterranean. 
mud and corallines.jG. of Smyrna. |Med., Cel’. Seas. 
2 minuta, Ford. ..sse|sesees|scsceveee 5 weed. Despotico. 
Eolida, Cuv....ssserees 1 
embletoni, Johnst.?)....e.[eceeeseee| lite stony. Paros. 
Elysia, Risso. 
timida, Risso ...... 1 lit. rocky. Paros. Celtic Seas. 

Gasteropoda, Inferobranchiata, Tectibranchiata, Scutibranchiata, Cyclo- 
branchiata, and Cirrhobranchiata. 
Of these orders there are sixty /Egean species, among which six are Infero- 
branchiata, twenty-two Tectibranchiata, fifteen Scutibranchiata, eleven Cyclo- 
branchiata, and one Cirrhobranchiata. Of the sixty species fifty-one have 
calcareous shells, the remainder belonging to the genera Aplysia, Pleuro- 
branchus, and Gasteropteron. The genus Doridium was not met with. Of 
the testaceous species eight are new, four inhabiting very deep water. Of 
the remainder, Bulla convoluta has hitherto been known only in a fossil 
state. Thirteen species range to the British Seas. Four or five testaceous 
species, inhabiting the western Mediterranean, do not reach the /Egean. 
Associated with the Dentalia are several species of tubico/ar annelides of the 
genus Ditrupa, most of them inhabiting very deep water. The slight con- 
traction of the mouth of the shell in this curious genus enables us to distin- 
guish between it and its molluscan analogue when the animal is absent. 
