238 BULLETIN OF THE 



abdomen an even, long oval outline. Abdomen suborbicular, slightly exca- 

 vated on the margin at the base of the caudal stylets. Basal segment of an- 

 tennule subspherical, second segment cylindrical, forming with the fir.-;t a well 

 marked peduncle; flagellum composed of six or seven segments; the tip of the 

 antennule does not reach the distal end of the penultimate segment of the 

 antennal peduncle. Peduncle of antenna composed of three short, followed by 

 two long segments; flagellum long, reaching, when bent backward, as far as 

 to the abdomen. Mandible furnished with a tri-articulate palpus. First pair 

 of thoracic appendages of male provided with a thick claw; on the palmary 

 border are two long teeth and a small blunted tubercle ; dactylus armed with 

 a blunt tooth or tubercle near the middle. Caudal stylets with two subcylin- 

 drical branches, the inner of which is somewhat longer than the outer. Color, 

 slaty brown mottled with lighter yellowish spots. 



"Length, without caudal stylets, | inch ; breadth, ^\ inch." 



INSECTS, etc. 



The following are Professor Garman's notes on the invertebrates sent 

 him for examination. 



" The invertebrates sent me for identification pertain to common species, 

 for the most part aquatic, such as one would expect to find at the mouths of 

 caves from which emerge streams of water. With the exception of a myria- 

 pod and a small grub, all have well developed eyes. One or two may be 

 classed as shade-lovers, since in ordinary situations they commonly affect re- 

 treats from which direct sunlight is excluded. The myriapud is totally blind, 

 but is not, so far as I know, an inhabitant of caves. It is one of a number 

 of widely distributed species, which spend much of their time in moist earth. 

 The absence of eyes in a dipterous larva of the lot has also no necessary rela- 

 tion to a life in caves, since larvae probably identical with it as to species are 

 frequently taken^among rubbish in open ditches and rivulets. The value of the 

 collection is therefore to be looked for in the direction of its remote bearing on 

 the problem of the origin of cave life, — a problem which needs for its com- 

 plete elucidation all details obtainable which may by any possibility throw 

 light upon this subject. 



"The single mollusk of the collection, represented by many specimens from 

 Wilson's cave, is Physa heterosfropha Say, a species which is extremely common 

 in the weedy shallows' of ponds, lakes, and streams of the Middle States. It 

 does not Ordinarily avoid light more than other small fresh-water snails, and 

 had perhaps penetrated the cave in following up its food supply. The ex- 

 amples are quite typical of the species. 



" A myriapod, Scoloporryptops sexspinosa Say, is represented by one specimen 

 marked ' From Wells.' Though lacking ocelli, it can hardly be considered a 

 cave species, inasmuch as it is found everywhere throughout the eastern 



