446 Miscellaneous. 



Yarrell D 16+15 P 19 V 1+5 A 3+8 C 14 



Coucli D 15+13 P 17 V 1+6 A 3+7 C 15 



Giintlier B J-f .. ., Ag^j, .. Vert.12/19 



Day D Jl P 20 V 1/5 A^A C 13 Vert. 12/19 



Fi-om Shetland, 1883 . . . . D 15+13 P 19 V 1+5 A 3+7 C 15 



^ fFrom Berwick, 22 i. 85 .. D 12+12 P 20 _ V 1+5 A 3+6 C 16 



I -S I From „ 19 V. 85 . . D 12+13 P | J^ J^^J'^ i V 1+5 A 3+6 14 Vert. 25 

 il -<: From Stoneliaven, 14 ii. 87. D 12+14 P 20 V 1+5 A 3+6 C 14 



II From „ „ D12+13P|}^;gJ^*| V1+5A3+6C15 

 1^^ LFrom „ „ D 12+13 P 19 V 1+5 A 3+6 016 



The following measurements were taken (along a median longi- 

 tudinal line) from the largest Stonehaven specimen ;— 



mJUim. 



Diameter of eye «50 



Length from tip of premaxillfB to centre of eye 40 



jj ,, „ to posterior end of closed maxillae 51 



jj „ „ to root of pectoral fin 105 



„ „ „ „ pelvic flu 114 



,j „ ,, ,, 1st spine of dorsal fin 93 



,, „ „ „ 1st soft ray of „ 221 



„ ,; „ „ last _ „ ' „ 281 



jj „ „ „ 1st spine of anal fin . . 210 



„ „ „ „ 1st soft ray of „ . . 220 



,, „ „ „ last „ „ ... 257 



^j „ „ ,, outer caudal ray .... 315 



j^ „ „ to tip of caudal central rays .... 378 



Depth through centre of eye 73 



„ at root of first dorsal spine 110 



„ „ „ anal_ „ ■. 98 



„ (least) at root of tail 34 



One of the three Stonehaven specimens had 6 spines on the pre- 

 operculum instead of the usual 5, the extra one heiug small, and 

 situated close to the most ventral of the series. 



On a neiv Genus of Phospliorrescent Lumhricidte, and on the Type- 

 species of that Genus, Photodrilus phosphoreus, Duges. By M, 



A. GlABD. 



The existence of the photogenic function among certain Lum- 

 brieidfe has often been pointed out; hut very rarely have the parts 

 which present this peculiarity been described in a sufficient manner, 

 and the conditions under which the phosphorescence is produced are 

 still imperfectly known. During the months of August and Sep- 

 tember I observed, at Wimereux, in the paths of a garden at some 

 distance from the sea, a luminous earthworm, which ai^pears to me 

 to belong to a new genus of the group of " Lumbriciens postclitel- 



1 



