322 APPENDIX. 



five short arched spots in one row. The Herma- 

 pln^odihis does not swim singly about in the sea, 

 in its natural state ; but several together, the one, 

 holding itself fast by the points of the elongated 

 excrescence to that of the next, form themselves 

 into a wheel-shaped figure, the elongations forming 

 the radii. In the large channel, through which 

 the water flows that it sucks in, to move the body 

 forwards, it carries a young one, fastened by a 

 navel-string to the inner side of the back : this 

 young one is living, and sucks in and discharges 

 the water at the same time as the one that bears 

 it. It has no elongation on the fore part of the 

 body ; and has on each side of the back five blue 

 spots, and is therefore a hermaphrodite. 



The Hermaphrodita^ always single, nourishes in 

 a conical space, in the under part of the body, an 

 innumerable quantity of Hermaphroditus ; and 

 from eight to ten are born together, holding to 

 each by their elongated excrescence. 



During the second calm, on the 24th of October, 

 we caught a number of Glaucus Atlantktis, 

 , Blumenbach, which seemed to lie quietly on the 

 surface of the water, and on the following day a 

 Pterotrachea pulmonatay Forsk., which has a great 

 resemblance with a fish. During all this time we ob- 

 served the Gryllus tataricus, L. lying in great 

 numbers on the water ; a propitious wind had 

 happily driven these destructive swarms into the 

 sea. It did not appear to be many days since this 



