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VOL, XV, 
“Ns PROCEEDINGS OF THE NATIONAL MUSEUM. 208 
Tiarinia spinigera Stimpson. 
(Plate x1, fig. 2.) 
Jarapax somewhat elongated, the greatest breadth, excluding spines, 
being considerably less than the postorbital length. . Upper surface 
not very convex except at the well-developed gastric region; cardiac 
region, with three tubercles at the summit, placed as usual in the genus ; 
on either side of this on the branchial regions there are three sharp, 
erect spines, the outer one being lateral a little larger than the others, 
and somewhat inclined outward. There is a single longish clavate seta 
at the summit of each spine. Upper posterior margin with seven small 
spines, the middle one largest at the summit of the intestinal region; 
Jower posterior margin also with seven spines, but of much smaller size. 
The sides of the carapax, including the hepatic regions, and the poste- 
rior half of the upper surface are covered with small, sharp tubercles 
occupying the interspaces between the spines and larger warts; while 
the gastric region and parts adjacent on either side, although irregu- 
larly protuberant, are nearly smooth. Rostrum sharp and very slender, 
in Jength equaling two-thirds of the interorbital width; horns contig- 
uous throughout their length. Prieorbital tooth prominently salient, 
very slender and sharp, curved upward; a single closed fissure sepa- 
rates it from the somewhat prominent postorbital tooth. The basal 
article of the external anteunce is broader than long; its antero-exterior 
tooth lies close beneath the prieorbital tooth and helps to form the deep 
tubular orbit, which incloses the eye as in a sheath. The edges of the 
rostrum and of the external antennie are, as usual, ciliated; and there 
are some few crispate setze on the prominent parts of the carapax ante- 
riorly and at the sides. 
In the feet of the anterior pair the carpus and meros are sparingly 
spinulose above. The ambulatory feet are almost smooth; those of the 
first pair in the female are scarcely as long as the carapax. The abdo- 
men in the female is tomentose. Two specimens only of this species 
were found, both females. The dimensions of the largest are: length 
of the carapax, 0.79; breadth, including spines, 0.57 inch. 
This species occurred at the islands Ousima and Tanegasima, of the 
southern Japanese chain. 
Perinea tumida* Dana. 
Crust. U. S. Expl. Exped., 1, p. 114, pl. 1v, fig. 1, 1852. 
Our specimens agree well with those of Dana, except that in the male 
the pincers are much smaller and less gaping, while the size of the ear- 
apax is the same; this may, however, result from a difference of age 
and development. 
Taken from branches of Madrepora found below low-water mark near 
Hila, Island of Hawaii. | 
* Now included in the genus Microphrys. 
