132 REPORT—1843. 
occasionally, and were frequently examined in the hope of throwing new light 
on their true position in the animal kingdom. All the uaked nucleobranes 
of the AZgean are extremely active animals, rapid in their movements, and 
ferocious in their habits. 
Pteropoda and Nucleobranchiata. 

No. of | No. of 




i Mediter- 
ce a ranean Observations. 
Species. 
a 
PTEROPODA. 
Hyalea, Lam. ..--- 3 4. 
1. tridentata, Forsh. .\......|.++--- Living, Cervi. Dead, Lycia, VIII. 
2. gibbosa, Rang. . «|..++-+|.++- 
3. vaginellina, Cantr..|... 
Cleodora, Per. and Less. 
1. cuspidata, Bose. .|.. 
2. pyramidata, Péron.|... 
Criseis, Rang ..--+-- 
1. spinifera, Rang . .|....-- 
2. striata, Rang... .|.....- 
§. clava, Rang... -|...-. 
..|Dead in Region VIII., common. 
. Dead in Region VIIL, frequent. 
.++-..(Dead, v.r. Region VIII. 
.....-(Dead, common. Region VIII. 
3 [abundant. 
......|Living, common. Dead, R. VIIL., 
...... |Living,rare. Dead,R.VIII.frequent. 
.|...... (Living, common. Dead, R. VIIL., 

abundant. 
NucLEOBRANCHIATA. 
Atlanta, Less....+--+ 1 1 
1. peronii, Less. . - «|... eeleeesee Living,rare. Dead, R. VIUI.frequent. 
Ladas, Cantr.....--+. ] 2 
1. planorboides, Ford. |......|..++ ++ Dead, R. VIII., not rare. 
? Bellerophina, D’Orb. . 1 1 
]. minuta, Forb. ...|... 
Carinaria, Lam. .... 1 : 1 
1. mediterranea, Per.|......|...-..|Dead, R. VIL, v.r. Nid. 
Peracle, Forb. ....-- 1 1 
1. physoides, Ford. .|.. 
Firola, Per. and Less. . 
1. frederica, Less... .|... 
2. hyalina, Forsk. ..|... 
. «. (Dead, R. VIII, not common. 
5 
s+. «.|Frequent. 
«+ .e+. (Frequent. 
Do Bes. 4 b,ieper's' aha | tr Py Fe 
Sagitta, Q. and Gaim. 2 |2or3 
1. mediterranea, Forb.|......|.+-... Not frequent. 
2.Sp.alt.? ...+-- ......|Not frequent. 

Gasteropoda Nudibranchia. 
The absence of tides is extremely unfavourable to the presence of animals 
of this beautiful tribe, nevertheless numerous species are recorded as inhabit- 
ants of the Mediterranean. In the eastern division of that sea, however, they 
are scarce, and but seldom met with. The only species observed in any 
quantity was a large red Doris (D. argo) which frequents the rocks of 
the coast of Lycia, close to the water-mark, laying its bright red spawn in 
sponge-like masses on their surface. Another member of this genus was 
