DEC 28 1905 
The Ohio ^JSCaturalist, 
PUBLISHED BY 
The Biological Club of the Ohio State Urivversity. 
Volume VI. DECEMBER, 1905. No. 2 UBR 
- NEW 
TABLE OF CONTENTS BOTA 
Ort.mann — A New Spe<'ie.s of Cambarus from Louisiana 401 GAR 
Gleason— Notes from the Ohio State Herbarium. Y 403 
Berger— Habits ami Distribution of the Pseudoscorpiouidae, Principally Chelanops 
oblongus, Say 407 
ScHAPFNER — Key to the Ohio Dogwoods in the tVinter Condition 411> 
St.'HAFFNER. M ABEL— Frce-floatiug Plants of Ohio 420 
Surface — Meeting of the Biological Club 422 
A NEW SPECIES OF CAMBARUS FROM LOUISIANA. 
Dr. a. E. Ortmann, 
Carnegie Museum, Pittsburgh, Pa. 
The types and cotypes of the new species described herein 
were collected by Professor Jas. S. Hine on July 12, 1905, in a 
small freshwater pool, 34 inile from Gulf Beach, near Cameron, 
Cameron Parish, Louisiana. There are 2 males of the first form, 
and 4 females. They were found associated with a number of 
large and small individuals of Cambarus {Cambarus) clarki Gir. 
Cambarus (Cambarus) hinei spec. nov. 
(See Fig. 1). 
Description of male of the first form. 
Rostrum triangular, about twice as long as broad on the 
basis; margins very slightly convex, almost straight, rather 
evenly converging to the acute tip, with a very slight indication 
of lateral angles at the base of the short acumen. No marginal 
spines. Upper face of rostrum flat at the base, slightly concave 
toward the tip; margins slightly elevated. Postorbital ridges 
short, divergent posteriorly, sharp at anterior end, but without 
distinct spine. Carapace ovate, slightly compressed, punctate. 
Infraorbital angle blunt. Branchiostegal spine small. Cervical 
groove sinuate. No lateral spines on carapace. Areola as long 
as or slightly shorter than half of the anterior section of carapace, 
very wide, with 4 or 5 irregular rows of punctations. 
Abdomen as wide as, and longer than carapace. Anterior 
section of telson with two spines on each side, posterior section 
rounded. 
