ON ZGEAN INVERTEBRATA. 147 
continually on the look-out for these beautiful creatures only fifteen species 
were met with, mostly described forms. The sheltered bays of Asia Minor 
and the squally seas of the Cyclades were alike unprolific; twice only were 
considerable numbers met with; once in the Gulf of Scopea, where during 
the winter months great numbers of Awrelia, most species of which genus are 
gregarious, assembled, and once in the bay of Smyrna, where the presence of 
gigantic Rhizostome afforded full occupation for several days, in September 
1842. In neither case were the individuals widely spread, but confined to a 
limited space. Besides the two species named, six other members of the order 
Pulmograda were met with in the months of J uly, August and December. Of 
the Ciliograda, the Beroe forskilii was taken in May 1841, off the island of 
Milo, and in company with it a single example of the Cestwm veneris. A few 
days after a Cydippe was seen, but not taken, in the bay of Syra. Of the 
Physograda, several examples of a large Stephanomia were met with in the 
Gulf of Macri, in December, where they were seen floating a few feet below the 
surface, about 3 p.m.on sunny days. Of the Diphyde occasional individuals 
were seen, probably species of Calpe or Pyramis. Of the Cirrhigrada, Ve- 
lella spirans was collected by Lieut. Spratt on the shore at Rhodes, in De- 
cember 1842, and Porpita glandifera occurred once on the sandy shore be- 
tween Patara and the mouth of the Xanthus in February 1842. 
We must attribute the great abundance of Meduse in the western Medi- 
terranean, as compared with their scarcity in the eastern, to the oceanic in- 
fluence in the former. They abound near the gut of Gibraltar, a locality 
prolific in species as well as individuals. Their numbers decrease as we 
approach the shores of Greece. In the Aigean, as we have seen, they play 
an unimportant part. The few gregarious species extend their range to the 
Black Sea, where great herds of Awrelie are not unfrequently met with. 
Pelagic as these animals are, there is reason to believe that the range of the 
species is extremely limited, and that they afford a valuable means of defining 
zoological provinces in the open sea. 
Arachnodermata. 

No. of | No. of Date 
Locality. 

Agean| Medit.| when taken. 
Sp. Sp 
PuLMOGRADA. 8 29 
Rhizostoma, Cuv.......| 1 1 
cuvieri?, Bischs..... | seesee | covers Sept. 1842. |Bay of Smyrna. 
Cephea, Peron .........| 1 1 : 4 : 
tuberculata, Macri. .| ...... 8{ ae pi cnet ve 
Oceania, Peron .........| 1 
cruciata, Forsh....1:| sees | ceeees July, 1841. |Serpho Bay. 
Thaumantias .......000+. 1 1 
Me, UID. wis bs dal davies Waban. Aug. 1841. |Off Milo. 
Aurelia, Peron ......... 1 4 
granulata?, Lam. ...| .s..00 | sees Dec. 1841. |Gulf of Scopaa, Caria. 
Geryonia, Peron ....... 2 2 
TOV. SP. ? vecsissssceaee seveee | case | Auge 1841. Bay of Cervi. 
proboscidalis, Forsh.| ...... | ss. ++ Dec. 1841. |Gulf of Macri. 
Mesonema, Eschs. ...... 1 5 
coelum pensile, Mod.| ......' s+! May 1841. Off Milo. 
L 2 
