of the Fishery Board for Scotland. 



203 



This formula shows that Station I. has a higher number of records than 

 any others, and that the total number of records for the three outer 

 stations is 155, while the total number for the three inner stations is 185, 

 or fully 16 per cent, more than the outer. 



Formula (2) shows the total number of records of young Crustacea for 

 each of the twelve months, for {a) the three inner stations, 1., III., and 

 IV. ; {h) the three outer stations, V., VIII., and IX. ; and (r) for all the 

 six stations : — 



Names of the Months, 



Total number of 

 Records for each 

 Month, for 



(a) the Inner Stations, - 

 [h) the Outer Stations, - 



(c) all the Six Stations. 



0 1 4 29 22 14 27 30 16 26 14 2 

 0 0 2 20 23 12 17 29 25 13 10 4 



0 1 6 49 45 26 44 59 41 39 24 6 



Formida (3) shows the total number of the records of young Crustacea 

 for each of the seven years, for {a) the inner stations, I., III., and IV. ; 

 {h) the outer stations, V., VIII., and IX.; and (c) for all the six 

 stations : — 



Numbers of the Years, 1889.1890. 1891. 1892. 1893. 1894. 1895. 



Total number of 



(a) the Inner Stations, 



uuu X umuc. ux . ^/^^ ^j^g stations, 

 Jlecords lor each ' 

 Year, for | g.^ Stations, 



19 



32 



33 



33 



33 



11 



24 



17 



28 



31 



22 



26 



9 



22 



36 



60 



64 



55 



59 



20 



46 



But besides young and larval Crustacea there are other immature forms 

 mentioned in the lists of tow-net gatherings, and among them are occa- 

 sional records of embryo and young MoUusca (including Gasteropoda, 

 Lamellibranchiata, and Cephalopoda), young and larval Annelid es, as well 

 as plutei and other immature stages of star-fishes. 



Infusoria and microscopic algse are also described as being occasionally 

 in greater or less abundance, but the records of these forms are few in 

 number. 



There are occasional records of larval and post-larval fishes among the 

 lists of tow-net gatherings, but they also are comparatively few. 



(6.) Pelagic Fish Ova. 



There are a considerable number of records of pelagic fish ova among 

 the published lists of tow-net gatherings collected during the seven years. 

 These records, which for the sake of clearness are arranged in tabular form 

 similar to the other Tables, show that the total numbers for the inner and 

 outer stations are in inverse ratio to the records of young Crustacea for 

 the same stations, and this difference may probably be accounted for by 

 the outer stations being nearer to the more important spawning grounds 

 situated in the vicinity of the estuary. 



[Table, 



