44 Prof. M'Intosli's Notes from the 



Intermediate between P. leptalina {=pisonis) and P.- pan- 

 dosia^ but nearest to tlie latter; the primaries with wider and 

 less deeply incised black external area above; below with five 

 submarginal white spots ; in the secondaries below the brown 

 apical spur is carried, as a subcostal band, to the inner 

 margin close to the base, as in P. leptalina. 



Expanse of wings 47 millim. 



Two males, Rio Dagua, Colombia [W. F. H. Rosenberg). 



In typical P. kicalia^ from Honduras, the orange macular 

 submarginal stripe on under surface of secondaries appears to 

 be confined to the apex of these wings, which doubtless lei 

 Reakirt to compare his type with P. marana. 



VI. — Notes from the St. Andreios Marine Lahoratory. — 

 No. XVI.' By Prof. M'Intosh, M.D., LL.D., F.R.S., &c. 



1. On the Ova, Larval, Post-larval, and Younf? Forms of Rliomhus 



maxhmis, with Remarks on the Adults in Confinement. 



2. On the Ova and Larvae of Drepanopsetta plafessoides. 



3. On the Spawning-period of Ago7ius cataphractiis and the Vitality 



of its Ova. 



4. On the Post-larval Stage of Cry st alloy ohius Nilssonu, 

 6. Note on Lijuries to Oysters by Boring Forms. 



1. On the Ova, Larval, Post-larval, and Yomig Forms of 

 Rhombus maximus, with Eemarks on the Adults in 

 Confinement. 



No form has been the cause of greater uncertainty in regard 

 to eggs, larval, and post-larval stages than this species. Yet 

 ripe ova were first obtained during the trawling expeditions 

 in July 1884 in a female of 12 lbs. Neither then, nor in 

 1892, when Mr. Holt found another ripe female on the pontoon 

 at Grimsby, could a male be procured; but the latter natu- 

 ralist subsequently was more successful, hatched the fertilized 

 ova, and gave the first accurate account * of the larval fishes, 

 though none lived more than a few days after escaping from 

 the ^g^. Recently Dr. Canu f, who is carrying out fishery 

 investigations for the French government at the Marine 

 {Station of Boulogne-sur-Mer, was able to fertilize the eggs 

 and make a brief note of the development. The perseverance 



* Jonrn. Mar. Biol. Assoc, vol. ii. n. s. p. 399. 

 t Ann. Stat. Aquic. Boulogne, 1893, p. 131. 



