120 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



CONILERA STYGIA Packard. 

 Conilera stygia PACKARD, Proc. Amer. Assoc. Adv. Sci., XLIX, 1901, p. 228. 



Locality. Monterey, Mexico. Found in wells. 



"It is totally eyeless, and adds another to the blind fauna of our 

 caves and wells. Hitherto the genus has been represented by but a 

 single species, inhabiting the British coast. Compared with Bate and 

 Westwood's figure of C. cylindracea, the body is longer, the antennae 

 much longer, reaching to the middle of the first thoracic segment, 

 those of the second pair nearly to the middle of the seventh thoracic 

 segment. Only the first three pairs of legs are short, with a very thick 

 hand; the four hinder pairs of legs are long, slender. The two last 

 divisions of the pleopoda are unequal, the outer division very narrow, 

 but a little more than half as long as the broad inner division or endo- 

 podite. Length of body, 25 mm. ; breadth, 5 mm. 



" This form is like most, if not all, other blind or eyeless arthropods 

 in having a longer body, antennae, and legs in compensation for the 

 loss of eyes." a PACKARD. 



21. Genus CIROLANIDES Benedict. 



Eyes absent. First pair of antennae with basal article of peduncle 

 not extended straight in front at right angles to remaining part of 

 antenna. Peduncle of the second pair of antennae composed of five 

 articles. 



The plate of the second article of the maxillipeds is furnished with 

 hooks. 



Abdomen has all six segments distinct. 



The uropoda have the inner angle of the peduncle not produced. 



Only the first pair of legs are prehensile; the following six pairs 

 are ambulatory. 



CIROLANIDES TEXENSIS Benedict. 



Cirolanides texensis BENEDICT, Proc. U. S. Nat. Mus., XVIII, 1896, p. 615. 

 RICHARDSON, American Naturalist, XXXIV, 1900, p. 217. ULRICH, Trans. 

 Am. Microscopical Soc., XXIII, 1902, pp. 88-90, pi. *v. 



Locality. San Marcos, Texas, found in an artesian well. 



Body oblong-ovate, about two and a half times longer than wide, 

 7 mm. : 17 mm. 



Head wider than long, 2 mm. :3 mm. Anterior margin widely 

 rounded. Eyes absent. The first pair of antennae have the basal 

 article short; the second twice as long as the first; the third one and 

 a half times longer than the second. The flagellum is composed of 

 fifteen articles. The first antennae extend to the posterior margin 



Proc. Amer. Assoc. Adv. Sci., XLIX, 1901, p. 228. 



