Si //:\( E-GOSSIP. 





Dii the i rows of 36 di niii 1 1 



1 

 row- incl teeth in the row is variable, the p 

 « ritei having counted 51, 



Vftei thi to find 



u hedgi idula, and the suggestion thai il 



uurrovt fi irm ol teeth is 

 angle, "huh the two h 

 row ..i I ures make with one another po 



to the mouth opening, instead of u> the gullet, as in 

 Tcstaetlla. 



are (our divisions suggested ol the fom 

 teeth with broad basal plates characterised ( 1) by their 

 being crowded togethei in enormous numbers as in 

 most Helice : (2) by the presence "1 bifid median 

 denticles as in /'■'■ mens; (3) by a slender 



tritiil median tooth, while the others arc of .1 practi- 

 cally uniform and usually simple hooked character, 

 e.g., Punetum pygmaaim; (4) by a tricuspid median 

 tooth and laterals "l various shapes, with marginals 

 approaching the carnivorous types first considered, 

 Vilrea and Limax are examples. The classification ol 

 forms where the nerve cords are nut twisted as far a.s 

 go »ill siand thus: — 



I 1 rHEYNURA. 



Sti n n roPHOR v. 1 1 lAcanthoglossa; (2) Belo- 



glossa j (3) Echinoglossa. 



Eorvdontophora. in Pycnoglossa ; (2) /.eugo- 

 glossa; (3) Myriaglossa; 141 Dichoglossa. 



Sections are also made according to the number of 

 tract- in the alimentary canal, which is considered 

 and illustrated in detail. The circulatory and 

 glandular systems also come in for attention, Inn the 

 pages which give a special interest to l'arl V. deal 

 with food, and somehabits aptly discussed in their 

 several connections. 



Much interesting matter i- given with regard to the 

 effei 1 thai age, exercise, and temperature have upon the 



closed ill win: I. 



illuscs is dealt with, .0, by indi 



*\ 



Fit;. ^.—Arion hortettsis and ./. subfitx its RBASCBND1NG 



r.v MEANS OF Si [MB Tin; 



Kiu. -•. Train PROM im : * of Physa (ontinalis. 



pulsation of the heart. Here aestivation in the warm 

 1 and hibernation in the cold, are naturally 

 discussed. Winter shelters, supposed 10 have been 

 ited in limesi 1 are described 



and figured. Wanl . unfortunately. do< - nol 



allow of the illustrations being reproduced here. F01 

 the burrow, Mi. Taylor use- tin name "hyber- 

 naculum," a term usually employed lor the thick 

 epiphragm, with which the shell of many spei 



viduals to return to their quarters, after a difficult 

 journey in search of provender. As in the limpet, the 

 track followed often crosses itself, forming a figure ol 

 eight, and Mr. Taylor, judging from the ti 

 l.iinaces, assumes that such is the case with other 

 species. 



I i' m nails of mucus one is led on to slime glands, 



anil threads of slime used by naked forms particularly. 

 to lei themselves down from trees to the ground or to 

 find fresh supplies of food. The thread may reach a 



net in length in the slugs, and a very 

 illustration from sketches ly Mr. Wallis Kew ol one 

 of these animals descending and another climbing up 

 a slime-thread is given above. Freshwater forms, we 

 are told. are. however, the greatest adepts at this 

 ravelling. 



Wn fred Mark Webb. 

 j. /" Broadway, 



Hammersmith, II'. 



Mi '• M m Lam! and Freshwater Mol- 



by J. VV. Taylor. F. 1.. S. 



