ON CRUSTACEA FROM THE MONTE BELLO ISLANDS. 653 
36. Stalk-eyed Crustaceans collected at the Monte Bello 
Islands. By Mary J. Ratrusun, United States 
National Museum, Washington, D.C., U.S.A.* 
[ Received March 18, 1914: Read June 9, 1914.] 
(Plates I., II.+) 
InpDEx. 
Systematic : Page 
Periclimenes hermitewsis, Sp. We... ...ceceeecsevseeenserreveee 650 
fiaitknarates WES Dery INOVNS Ts“ pocenseencca casos bnonoaesaeeqesnces HSK / 
AIGTED: GUS ARLy FD Ws oop coscovsvcncondeneccassceanoecseonnc oats) 
Glyptowanthus cymbifer, SP. MN. ... ccc see eee seeseeseesrsensese 858 
This little collection, numbering only 28 species, contains three 
new species and variations of several old ones. Incidentally a 
hew name is given to one of the numerous forms of Zhalamita 
related to 7. admete, which in time ean perhaps be lined up as 
subspecies or varieties of that species. ‘The most notable of the 
new species is the Glyptoxanthus, a genus new to the Indo-Pacific 
region. 
A remarkable discovery is the fact that at least one of the 
marine crabs, Vasxioides serpulifera, undergoes transformation to 
the adult form while it is still within the breod-pouch of the 
mother. Furthermore, it there passes through two adult stages, 
but whether the first is hatched directly from the egg or not, it 
is impossible to tell. It has long been known that the fresh- 
water crabs (Potamonide) develop into the adult form before 
leaving the mother, and in some cases at least pass through a 
megalops stage. Careful researches into the metamorphoses of 
marine crabs would doubtless disclose other cases similar to that 
here recorded. 
Order DECAPODA. 
Family PENEID A. 
METAPENEUS MoNOCEROS (Fabricius) £. 
Metapeneus monoceros Alcock, Catal. Ind. Dee. Crust. Ind. 
Mus., Part iii. Fasc. i. 1906, p. 18, pl. iii. figs. 7—7e. 
Dredged off Hermite; 2 fathoms; July 7, 1912; No. 110: 
1 S juv., about 47 mm. long. 
METAPENEUS STRIDULANS Alcock 2 
Metapeneus stridulans Aleock, Catal. Ind. Dec. Crust. Ind. 
‘Mus., Part: iii. Fase. i. 1906, p. 27, pl. v. figs. 14, 14 a-d, and 
synonymy. 
* Communicated by Prof. J. Srannny Garprner, M.A., F.R.S., F.Z.S. 
+ For explanation of the Plates see p. 664. 
{ [The parentheses around the names of authors placed after scientific names in 
this paper are used in accordance with Article 23 of the International Rules of 
Nomenclature (Proc. 7th Int. Cong. Boston, 1907, p. 44 Gore) pat Dinos 
45 
