CALM ARIES CALM A RETS. 



29 



when the sea is calm. Six of its tentacula are then folded be- 

 neath and act as oars, and it is pretended that the two others, 

 the extremities of which are enlarged and raised up, are spread 

 for sails, as represented in the figure (12) ; but we should not 

 infer from their structure that these tentacula are adapted to such 

 a purpose. The common species is found in the Mediterranean, 

 the Indian Ocean, &c. ; it was known to the ancients under the 

 name of nautilus, and pompilius. 



20. The CALMAKIES Loligo differ from the preceding in their 

 elongated sack, and being provided with two terminal fins, by the 

 horny lamina, lodged in 

 the back, which supplies 

 the place of shell, and by 

 their tentacula, which are 

 ten in number, and not 

 of the same configura- 

 tion throughout (fg. 13). * 13 THE COMMON 

 Eight of these feet are of moderate size, and are armed with little 

 cups in their whole length, while the two others are very much 

 elongated and have cups only near their extremities. 



21. TheCALMAHETS Lo- 



ligopsis are remarkable for 

 the great length of two of their 

 arms (fg. 14), which are fili- 

 form, and widened at the end 

 only ; in other respects they 

 differ but little from the Cal- 

 maries : they are found in the 

 Mediterranean. 



22. Certain cephalopods, 

 which resemble the Calmaries 

 very much, but have their 

 long arms furnished with 

 hooks, form the genus of 

 Onychoteuthis (from the 

 Greek onux, in the genitive 

 onuchos, nail, and teuthis, a 

 calmary, that is, a calmary 

 with nails. 



23. The CUTTLE-FISHES 

 Fig. 14. THE CALMARET. Sepia have the tentacular 



20. How do the Calmaries differ from the Argonauts ? 



21. What are Calmarets? 



22. What is the ony'choteuthis ? (pronounced o-ni-ko-tu-this.) 



23. What are the general characters of the cuttle-fish ? Of what use is 

 cuttle-fish bone ? 



