87 
10. — On 5th December a young male Porbeagle Shark, Lamna 
cornubica, measuring 3 feet 2 inches, was sent to the Hancock 
Museum by Mr. L. Steel, and the Curator was kind enough to send 
me the specimen. It proved to be interesting because of its 
graceful shape, the length being much greater in proportion to the 
depth than in the adult condition. The colour moreover was blue 
above. Small spiracles were present, each a little in advance of 
the mid distance between the orbit and the first gill. I am obliged 
to Mr. Boulenger for confirming the determination of the species. 
11. — On the 9th December, Mr. Steel sent me a fine Monk Fish, 
Rhina squatina, a female measuring 3 feet 3 inches. The only 
peculiarities it presented were (1) the small eyes, these only measuring 
half the distance from the orbit to the spiracle ; (2) the dorsal 
spines, which were not at all prominent. 
12. — In June a female lobster was brought by Fishery Officer 
Buglass from Sea Houses, which had more than 20 mussels attached 
under the abdomen. The latter measured 1 to 2|- cm. The 
lobster also gave lodgment to Anomia between the pereiopods 
and elsewhere, small tubes of Serpula, large colonies of Membrani- 
pora, and 2 or 3 Barnacles. 
The length of the lobster was 13 J inches, and that of the ovary 
inches ; the ova were small. It was evidently going to cast, for 
the cuticle was completely separated except at the joints from the 
newly-formed cuticle. It is clear, however, that it could not 
have cast during the previous 2 or 3 years. It may be stated that 
female crabs are sometimes obtained with the abdomen distended 
by mussels attached there or to the thorax or both. 
As we now know that a considerable interval may elapse 
between the casting and the spawning period it is obvious that such 
a lodgment would prevent the ova being attached under the 
abdomen. 
