115 



spots, stripes, nor bands. Javvs nearly equal ; mouth small witli 

 retractile lips ; snout cylindrical, and, vvhen protruded, more tlian 

 an inch in length ; teeth setaceous. Eyes large; irides orange 

 yellow and brilliant, furnished with a nictitating membrane. Gill- 

 cover of two pieces, not spinous, but both angular. Lateral line 

 curved. Fins : dorsai very long and divided, anterior portion of 

 nine spines of uneąual length connected by a thin membrane, the 

 posteiior consisting of fifteen [twenty-four?] bristly rays; pectorai 

 small, of thirteen rays; ventral of six rays, the first a strong curved 

 spine, all united by a membrane likę the dorsai ; anai of twenty-six 

 rays, the first three being distinct spines ; caudal square, of fourteen 

 setaceous rays." . 



The other drawing represents a Tetrodon, evidently identical with 

 that obtained from the sarae coast by Pennant and by Mr. Donovan. 



Mr. Gray gavę some account of the reproduction of Cirrhipeda, 

 founded on observations made by him on Balanus Cranchii, Leach, 

 during a recent visit to the coast of Devonshire. In illustration of 

 his remarks he exhibited an adult of that species with the eggs at- 

 tached to the body at the base of the shell, and the young in ovo. 

 He also exhibited numerous very minute individuals of Bal. vulgaris 

 affixed to rock. 



He described the mode of reproduction as ovoviviparous. On 

 opening under water, after they had been preserved in spirit, the 

 eggs attached to the body of the adult, each was found to contain 

 a perfectly developed animal, vvhicli occupied nearly the whole of 

 its cavity. The form of the young Barnacle at this period of its 

 existence is ovate, rather tapering above, and truncated and ciliated 

 at the tip : it is furnished with three pairs of arms along the sides, 

 the base of each arm being tvvo-jointed ; the lower pair of armshas 

 only one elongated process, vvhile each of the tvvo upper pairs has 

 two fusiform, thick, articulated and ciliated processes, similar to 

 those of the anterior part of the perfect animal, but less elongated. 

 From the adult it differs chiefly in having a smaller number of feet 

 and in the less development of the hinder part. It is also destitute 

 of shelly covering, vvhich is probably not formed until the young 

 animal becomes fixed. In very small attached individuals of the 

 common Barnacle the shell is rather soft, transparent and horn-co- 

 loured. 



In the absence of shell from the animal in the egg, an additional 

 evidence is furnished of the aflinity of the Cirripedes to Crustacea 

 rather than to Mollusca : the fcetus in the latter class being covered 

 by ą shell at a very early stage of its embryo grovvth. The existence 

 in the young animal of a smaller number of arms than that found 

 in the adult is also analogous to the corresponding fact vvhich has 

 been observed in several of the Branchiopodous Crustacea. A simi- 

 lar fact has recently been noticed by Dr. Nordmann as occurring in 

 Ler7icea. 



Mr. Gray remarked that he had been the more induced to call 

 the attention of the Society to the subjects vvhich he exhibited, on 

 account of his observations being at variance with those recorded 



