CRUSTACEA DEC APOD A—BORRADATLE. 
107 
(ii) The postocular spines are shorter (not reaching the tip of the spine of the 
eye-hood) and stouter. 
(iii) The gastric region of the carapace is only very faintly tuberculate. 
(iv) The last spine on the hepatic region is smaller than that before it. 
(v) The basal joint of the antennal stalk has a strong spine directed forwards as 
well as outwards, and serrate on its outer side. 
The specimen (a female) measures 1 cm. in length. 
Unfortunately the chelipeds are wanting. Probably the species belongs to the 
type-sul )genus. 
Station ^jf. / 34 - 
Sub-tribe OXYSTOMATA. 
Family LEUCOSIIDAE. 
Sub-family LEUCOSIINAE. 
46. Persephona (Myropsis) laevis, n. sp. Fig. 16. 
Diagnosis .—Carapace longer than broad, smooth and minutely pitted, except on 
the hinder edge, where it is granulate, with a marked median keel, indications of the 
regions, and a very shallow notch between the hepatic and branchial regions. Front 
with a median notch between two slightly swollen projections; its edge fringed with 
hair, barely hiding mouth-frame. Fissures of orbit well marked. Of live spines in 
hinder region of carapace all somewhat upeurved, median and laterals fairly slender, 
intermediates little more than rectangular corners of hinder edge. Besides these, three 
blunt spines on branchial and one on hepatic region. Exopodite of third maxilliped 
about as wide as endopodite, its outer edge gently curved. All legs quite smooth 
and unarmed. Chelipeds of male a little less than three times length of carapace, 
fingers finely but irregularly toothed, gaping a little at base, nearly as long as palm, 
which is about one-third as wide again as wrist. Walking legs short, slender, about 
one-fiftli longer than arm of clieliped; dactylopodite equal to propodite with about half 
of carpopodite. 
Length of single (male) specimen, 24 mm. 
Placed in a bottle with Gecarcinus from South Trinidad Island, and therefore 
probably taken near the island. Its condition somewhat suggests its having been 
picked up dead on the shore. 
/yj./.ip lU 
