68 IOWA STUDIES IN NATURAL HISTORY 
LIST OF SPECIES 
Order DECAPODA 
Family Peneide 
Peneopsis smitht Schmitt 
Peneopsis smithi Schmitt, Macruran, Anomuran and Stomatopod Crusta- 
cea, collected at Curagao by Dr. C. J. van der Horst in 1920. 
Bijdragen tot de Dierkunde, Amsterdam, XXIII (1924), p. 62, text figs. 
Dyas 
Bathsheba; 83 42. Pelican Island, tide pools, May 11; 22. 
English Harbor, 3; 1¢. 
Of the four females taken at Bathsheba, the third abdominal 
somite of the two larger specimens, respectively 48 and 49 mm. 
in length, shows distinct though not at all prominent longitu- 
dinal carination for about the middle third of its length, or a 
little more. This carina, such as it is, is low and inconspicuous 
and does not rise above the general level of the surface of the 
somite, being scarcely more than indicated by two slight pubes- 
cent depressions one either side of the median line of the middle 
third of the dorsum, and very unlike the well marked, raised 
carina found on the third somite of P. goodet. This carina is 
not in evidence in the males, in the smaller, 28 and 38 mm. 
long, Bathsheba females, or in the two from Pelican Island, of 
which the larger, 45 mm. long, individual is about the size of 
the 43.5 mm. long, type female from Curacao. It seems almost 
that the weak carination is but an indication of full maturity 
in the female sex. The distinctive thelyeum, and the slender 
median point of the telson still sharply differentiate this species, 
as does to a lesser degree the non-carinated third abdominal 
somite of the males and younger females, and the weakly eari- 
nated third somite in the more mature females; the larger 
males, of more than 40 mm. in length do show a faint angle 
only, across the posterior end of the median line of the third 
abdominal somite, the merest suggestion of a carina, if it can 
be recognized as such at all. 
Sicyonia edwardsu Miers 
Sicyonia edwardsii Miers, Ann. Mag. Nat. Hist., (5), VIII (1881), p. 
367. Milne-Edwards and Bouvier, Mem. Mus. Comp. Zodél., X XVII, 
no. 3 (1909), p. 251, pl. 8, figs. 1-3. 
English Harbor, electric light; 12. 
