THE MAMMOTH CAVE. 91 



several specimens, and satisfied myself that the 

 peduncle of the eye only exists ; but there are 

 no visible facets at its extremity, as in other 

 crawfish.* 



" Mr. Thompson mentions, further, crickets, 

 allied to ' Phalangopsis longipes,' of which Tell- 

 kampf says that it occurs throughout the Cave. 

 Of spiders. Dr. Tellkampf found two eyeless, 

 small, white species, which he calls • Phalangodes 

 armata' and 'Anthrobia monmouthia' — flies, of 

 the genus 'Anthomyia' — a minute shrimp, called 

 by him 'Triura cavernicola,'and two blind beetles 

 — 'Anophthalmus Tellkampfii' of Erichson, and 

 'Adelops hirtus;' of most of which Dr. Tell- 

 kampf has published a full description and 

 figures in a subsequent paper, inserted in Erich- 

 son's Archiv, 1844, p. 318. 



" The infusoria observed in the Cave resemble 

 'Monas Kolpoda,' 'Monas socialis,' and ' Bodo 



* Speaking of the eyes of animals, it is remarked in the val- 

 uable school-book of Professors Agassiz and Gould, entitled 

 " Principles of Zoology," Boston, 1859, " Others, which live in 

 darkness, have not even rudimentary eyes, as, for example, that 

 curious fish (Amblyopsis spelceus) which lives in the Mammoth 

 Cave, and which appears to want even the orbital cavity. The 

 crawfishes {Astacus pellucidus) of this same Cave are also blind, 

 having merely the pedicle for the eyes, without even traces of 

 facettes." — p. .55. 



