249 



Hintdinidos. 



d. Showing tbe reproductive organs. 



e. Ditto. 



/. A leech cut open, showing the nervous system and in- 

 ternal transverse muscles. 



g. Ditto, showing the lateral vessels and mucous glands. 

 h. Ditto, showing the three layers of muscles, 

 t. Two cocoons, the upper one showing the internal surface. 

 j. Cocoons and small leeches. 



Note. For fig. of dissections, see Per. Mat. lied., vol. ii., pt. ii., pp. 729 

 to 731. 



757. SANGUISUGA MEDICINALIS, Sav. (Green Leech.) 



a. From Barbary. 



b. From Spain. 



CLASS, CRUSTACEA. 

 ORDER, DECAPODA. 



AST ACID JE. 



758. ASTACUS FLUVIATILIS, Fab. (Crayfish.) 



a. Preserved wet. 



I). " Crab's eyes " or "crab's stones." 



Note. Specimen 6 consists of the calcareous concretions found inside 

 the animal when about to cast its shell, of which concretions two are then 

 found in each animal, but disappear when the new shell is formed. 



c. Prepared, in small annulated conical masses. 



Note. Specimen c was presented by Messrs. Allen & Co., Plough 

 Court. 



CANCPID^E. 



759. CANCER PAGDRUS, L. (Common Crab.) 



a. Prepared crab's claws. 

 Note. Presented by Messrs. Allen & Co. 



CLASS, MYRIAPODA. 



ORDER, ISOPODA. 



ONISCIDJE. 



760. ONISCUS ASELLUS, L. (Woodlouse.) 



a. Dried. (Millepedes.) 



Note. Formerly official in the London and Edinburgh Pharmacopoeia, 

 and used in jaundice, asthma, and scrofulous disorders as a resolvent, 

 aperient, and diuretic. See Lewit, Mat. Med. 1734, pp. 425, 426. 



