252 A HISTORY OF RECENT CRUSTACEA 
tarda has the apex of the telson cleft instead of truncate. 
Pasipheea princeps (S. I. Smith), 1884, obtained from a 
depth of 1,342 fathoms in the North Atlantic, is much 
larger than the type-species, since it attains a length of 
between eight and nine inches. The apex of the telson is 
cleft. 
Leptochéla, Stimpson, 1860, is distinguished by having 
a short one-jointed mandibular ‘palp, and the second 
maxillipeds not pediform as in Pasiphcea, but with the last 
joint armed with long spines or hairs. The species are 
not large, Leptochela robusta, Stimpson, being only an inch 
long, and his Leptochela gracilis and Spence Bate’s Lepto- 
chela serratorbita being still smaller. 
Parapasiphaé, 8. 1. Smith, 1884, has a very small and 
slender mandibular ‘ palp, composed of two nearly equal 
joints. In Orphania tenuimdina, Spence Bate, these organs 
were not examined, the specimen on which the genus and 
species were founded being ‘ unique and not very perfect.’ 
Family 10.—Oodeopidee. 
The carapace is short, produced to a long horizontal 
rostrum. ‘The eye-stalks are short, the eyes large. The 
mandibles are without ‘ palp ;’ the third maxillipeds long, 
slender, and pediform. ‘The first pair of trunk-legs are 
chelate or subchelate and larger than the second, which 
are simple. 
This family was formed for a single genus, but may 
perhaps receive a second. 
Oodedpus, Spence Bate, 1888, starts with seven species, 
but as they are all founded on immature animals, their 
actual characters remain vague, and with them those of 
the genus and family. The generic character makes the 
‘first pair of pereiopoda large and chelate, but a following 
observation states that the most advanced specimen in the 
collection ‘shows a tendency to develop the first pair of 
pereiopoda into a chela in the adult stage. All the other 
specimens exhibit them in the simple form,’ which Spence 
Bate no doubt rightly takes te be a still more immature 
