286 BLIND CKAYFISHES OF INDIANA HAY. 



smooth and rounded at the end, and llic lateral spines of the <'arai)acc 

 arc at best repiesented by a low low, smooth tubercles. 



The rostruiu is shortened still more, tliaii in Prof. Cojte's inermis^ and 

 instead ofbeinij ^'deeply sinuated to Ibrm the acumen," runs to a point 

 in a ijradual curve, \ery much resend)Iin,u- in this respect C. acKminatus. 

 The [(ortiou of the carai)ace in front of the cervical jiToove is shorter 

 than in the averaiic of specimens from Shiloh Cave, and conspicuously 

 shorter than in specimens from ^launnoth Cave. In respect to the 

 hooks on the lejis of the males 1 tind the species variable. In none do 

 1 tind hooks on both lej^s of the fourth pair; generally they are wholly 

 wanting, but in some there is asnmll tubercle on one leg, which is miss- 

 ing from the other. The hooks on the third ])air of legs are of a slightly 

 ditferent form from those of specimens from Shiloh or A\ yandotte. 

 They are shorter, blunter, and not curved. 



The first abdominal appendages of the males do not differ in any 

 respect from those of the typical C. 2)eUt(ci<lHti. 



In the female the anuulus veutralis shows marked ditierences from 

 the typical forms. 



The antennal scales, also, are different in form, and especially in 

 length. 



Were it not for a few specimens collected at Shiloh and one from 

 Wyandotte, which in a few characteristics seem to approach the new 

 variety and show an incomplete gradation into the typical form, I 

 would feel justified in considering these Mayfield specimens as a dis- 

 tinct species. 



More recently, Truett's Cave, a short distance from Mayfield's, has 

 afforded one specimen of the new variety. 



It W(mld thus appear that ('. prUitculus frstil occurs only in those 

 caves which form the nu)st northern and outlying part of the cave 

 region of southern Indiana. 



Following is a list of the h>calities in Indiana from which blind cray- 

 fish have been taken- It will be seen that they are scattered over a 

 large part of the southern half of the State, and subsequent exidora- 

 tion Avill probably show that they exist in every cave provided with 

 running water, 



Truett's Cave, Monroe County; Mayfield's Cave, Monroe County; 

 Shiloh Cave, Lawrence County; Down's Cave,* Lawrence County; 

 Dunnihue's Cave, Lawrence County; Connelly's Cave,* Lawrence 

 County; Donnelson's Cave, Lawrence County; cave at Cliffy, Larthol- 

 (unew County (F. C. Test, J. F. Newsom); cave near Paoli,* Orange 

 County; Marengo Cave, Orange County; Wyandotte Cave, Crawford 

 County; small cave near and southwest of Wyandotte Cave; Wild 

 Cat Cave, near Wyandotte: •• caves in ITarrison C<muty:" "caves near 

 Madison."' 



*It may be interestinji;, that anunig tlu' many caves in wliidi I observed C. pcUu- 

 cidiis, these niarl^t'd w itli ;in iislfiisk contained l«it)i it and C. Bartoiiii. 



