THE AXXALS 



MAGAZINE OF NATURAL HISTORY. 



[SEVENTH SERIES.] 

 No. 117. SEPTEMBER 1907. 



XXVIT. — Xotes from the Gatty Marine Laboratory, St. 

 Andreics.—^o. XXVIII. By Prof. M'lXTOSH, M.D., 

 LL.D., F.E.S., &c. 



[Plates VI.-Yin.] 



1. On a Porbeagle Shark with a large Suboral Aperture. 



2. On the Young of the Ling. 



3. On a large Example of Ommastrephes sagittatus, d'Orb, 



4. On Genetyllis citrina, a new Phvllodocid. 



o. On the Reproduction of Nereis diver sicolor, 0. F. Miiller. 



1. On a Porbeagle Shark with a large Suboral Aperture. 



The number of porbeagle sharks caught in the gill-nets of 

 the fishermen in St. Andrews Bay has been a subject of 

 remark in former notes, and as time advances they do not 

 appear to be diminishing. A female 9 feet long and in a very 

 healthy condition entangled itself in the gill-nets for cod last 

 November, and as the fishermen stated that it had two mouths, 

 it was brought to the Laboratory. Inspection showed that 

 all the internal organs were in a normal state. At a distance 

 of 5 inches behind the tip of the mandible is a large aperture 

 (Pi. VI. tig. ],«), with a smoothly cicatrized margin, measuring 

 in the preserved specimen 4 inches in transverse diameter, 

 and blocked inferiorly by the basihyal, covered with cicatrized 



Ann. d: Mag. X. Hist. Ser. 7. Vol. xx. 12 



