124 MR J. T. CUNNINGHAM ON THE 



very similar; its length three days after hatching was 11 "5 mm. The eggs of 

 both species are adhesive, and form masses sticking to objects on the shore. 



Fam. 12. Cataphracti. 



The fertilised ova of Agonus cataphractus have never been described; 

 but Prof. M'Intosh, in 3rd Ann. Rep. S. F. B., says he found nearly mature ova 

 in a specimen trawled near St Andrews on March 12. The ova had a pale 

 salmon colour, were 1*3 mm. in diameter, and probably adhesive. 



Fam. 13. Pegasid^e. 



Div. IX. ACANTH. GOBIIFORMES. 



Fam. 1. Discolali. 



The ova of Cyclopterus lumpus have been mentioned in the previous section. 

 Liparis is the only other genus, and what is known of the spawn of Liparis 

 Montagui has also been stated. 



Fam. 2. Gobiid^e. 



Gobins Ruthensparri is stated by Day to have been bred in confinement by 

 Mr Roberts of the Scarborough Museum. The ova were adhesive, and were 

 deposited within the shell of a barnacle. The male watched over the mass of 

 eggs, and fanned them with his fins. 



Hoffmann (loc. cit., p. 19) gives a description and figure of the ovum 

 of Gohius minutus. The ovum has a peculiar elongated pyriform shape, with a 

 very large perivitelline space, and at the narrow end are a number of filaments, 

 in the centre of which is the micropyle. The eggs are attached by the 

 filaments. 



The ova of Callionymus lyra are pelagic, and have been described by 

 M'Intosh, in Ann. and Mag. Nat. Hist., Dec. 1885. On the 8th August a 

 female specimen was obtained at St Andrews, from which ripe ova could be 

 pressed out. The ova are pelagic, transparent and buoyant, small in size, being 

 of about the same diameter as the ova of Pleuronectes flesus. The exterior 

 surface of the vitelline membrane or zona racliata exhibits a reticulum of 

 slightly elevated ridges, the meshes of the reticulum being hexagonal; from 

 this characteristic the ova can be easily identified. At Millport, in June of the 

 present year, I obtained a pelagic ovum from the tow-net which agreed exactly 

 with Prof. M'Intosh's description. M'Intosh adds, that Trophon, hermit 

 crabs, and bivalve mollusca were found in the stomach of Callionymus. He 

 gives no figures or description of any embryonic or larval stages of the species. 



