MUSEUM OF COMPARATIVE ZOOLOGY. 237 



Plate II. a hasty sketch of an adult female of Cambarus setosus, one 

 half larger than natural size, and another of a specimen of Asellus Hop- 

 pince, three times the size of the specimen. On Plate II. Fig. 1, the 

 outer two joints of each leg of the hinder two pairs are bent under, 

 so that they appear one third shorter. The remainder of the collection, 

 the insects, mollusks, and the like, was examined by Professor H. Garman, 

 to whom I am indebted for identifications and notes quoted below. 



Cambarus setosus Faxon. 



" Carapace granulate on the sides, with scattered hair-like setae ; cervical 

 groove sinuate ; a small lateral spine just behind the cervical groove ; rostrum 

 of moderate length, triangular, excavated, lateral margins convex, no lateral 

 teeth (except in smaller specimens, which have a small, acute tooth on each 

 side near the tip); post-orbital ridges slightly developed, without anterior 

 spines; region behind the cervical groove relatively long; areola very narrow, 

 punctate. Abdomen about the same length as the carapace, with scattered 

 hairs; telson bispinose (occasionally trispinose) on each side. Anterior pro- 

 cess of the epistoma broadly triangular, margins more or less notched or 

 dentate. Eye-stalks and eyes rudimentary. Basal segments of antennules 

 furnished with a sharp spine near the distal end. Antenna? longer than the 

 body; scale very broad at the distal end, external border slightly convex, 

 ending in a short, sharp spine. Third pair of maxillipeds bearded within. 

 Chelipeds of moderate length; chelae long, very hairy, toothed on the inner 

 margin, granulate on the outer margin; fingers long, compressed, costate ; 

 carpus toothed on the inner face, granulate on the outer side; upper surface 

 of meros granulate, lower surface with two rows of sharp spines. Third pair 

 of legs of the male hooked. First pair of abdominal appendages terminating 

 in two recurved hooks (similar to those of C. Bartonii). Annulus ventralis 

 of the female prominent, with a deep central fossa. 



" Length of one of the largest specimens, 2-| inches ; carapace, l£ in. ; from 

 tip of rostrum to cervical groove, |J in. ; chela, 1^ in.; fingers, \^ in." 



From the wells come also two very small specimens with well devel- 

 oped eyes, probably C. virilis Hagen. They are too young to determine 

 with certainty. 



Asellus Hoppinee Faxon. 



"Anterior margin of head with a median concavity, from the bottom of 

 which projects a rostral tooth; external angles rounded; the head widens 

 posteriorly, so that the hind margin is nearly as broad as the anterior margin 

 of the first thoracic segment; eyes of moderate size, oval. Thoracic segments 

 subquadrate, lateral margins convex, giving to the body with the head and 



