NATURAL SCIENCES OF PHILADELPHIA. 107 



of the whole hand ; denticulated along the whole length of their approximated 

 margins. The third article of the second pair of feet flattened ; that of the 

 third pair less so The same article of the fourth pair nearly cylindrical ; 

 that of the fifth pair cylindrical. This article is long, straight and inflated : 

 largest diameter in the middle, gradually tapering anteriorly; no enlargement 

 at the nodes. Hair on the body very short, scarcely discernable. Length of 

 body about one inch. 



This species can very readily be distinguished from Pdoplastus (Chionoecetes) 

 Pallasii, Gerstsecker. Unlike this the upper surfaces of the tibia; are not cov- 

 ered with short spines, and the double row of granules is wanting on the 

 tarsi. 



C. Chilensis may be distinguished from C. Behringianus, Stimpson, by the 

 wart-like prominences not increasing in acuteness anteriorly and at the sides, 

 except at the inferior antero-lateral margin. Here, instead of there being 

 fourteen small bifid spines as in C. Behringianus, there are but eleven or twelve ; 

 the first five or six only being of any size. The third articles granular below 

 as well as above. Only the inferior angles of the arms of the first pair of 

 feet are muricated. 



Habitat. Chili. 



(Cabinet Phila. Acad. Nat. Sci.) 



Huenia bifcrcata, Streets, n. s. 



Carapax smooth, elongated, narrowing in front. Antero-lateral margins 

 acute. On the gastric region three low tubercles arranged in a triangular 

 form with the base of the triangle directed forward. A low tubercle on the 

 cardiac region. The antero-lateral borders produced into sharp processes, di- 

 rected forward, outward and slightly upward from the base of tbe rostrum. 

 Rather broad lateral projections at the junction of the antero-lateral and pos- 

 tero-lateral borders, directed somewhat upward. These projections present 

 two teeth at their extremities, separated by a concave interval. Postero-lat- 

 eral borders rounded. Posterior border projecting backward lip-like, slightly 

 everted on each side. 



Rostrum about two-tenths of an inch in length; bifurcated at its point; 

 flattened horizontally at the anterior extremity, which is on a lower plane 

 than the base. Upper surface covered with hooked hairs. Under surface of 

 the rostrum concave.. < 



Eyes small, slightly projecting from under the lateral borders of the cara- 

 pax. -External antennae slender and completely concealed under the anterior 

 prolongation. Basal article cylindrical, slightly clubbed at its anterior ex- 

 tremity ; the second article more than half the length of the first ; the third 

 very delicate. 



Anterior pair of feet about the same length as the carapax. On the distal 

 extremity of the upper surface of the third article is a small tooth directed 

 forward. Second pair of feet longer than the first pair, about one inch in 

 length. The following feet considerably shorter, and each presents a spine at 

 about the middle of the under surface of the fifth article. Carapax, rostrum 

 included, nine-tenths of an inch in length. 



Habitat. New Zealand. 



(Cabinet Phila. Acad. Nat. Sci.) 



On the Flowers of ARALIA SPINOSA, L., and HEDERA HELIX, L. 

 BY THOMAS MEEHAN. 



The study of Aralia spinom, />., affords some interesting facts which do not 

 seem to have attracted the attention of other observers. 



In Dr. Gray's indispensable .Manual of Botany, it is said to be more or 

 less polygamous." I have had many specimens under my daily observation 



1870.] 



