84 



laden female with a carapace only f inch long and 1 inch broad. They may 

 possibly be a dwarf variety of P. cunicularis. 



^—. S. India. F. Beddome. 3 ? . 



S. India. F. Beddome. 1 (J . 



4 

 1753-55 1761-63 



10 10 



S.India. Travancore Museum. 2 (J , 4 ^. 



10. Paratelphusa (Barytelphusa) edentula, Alcock. (Fig. 19.) 



Tlii.s species connects P. cunicularis, P. guerini, and P. lugubris. As in 

 cunicularis, the post-orbital crest runs right into what there is of a lateral 

 epibranchial tooth ; and, as in guerini, the carapace is convex, and the cervical 

 groove is broad and deep in all its com-se. It differs from both in the form of 

 the 6th abdominal segment of the male, which is a little longer than broad 

 (longer than in jacquemontii) and almost hom'-glass shaped. A vague break, or 

 suggestion of a break, between the epigastric and post-orbital crests brings the 

 species near P. lugubris, of which I was at one time inclined to regard it as a 

 variety. 



Carapace, as in P. guerini, convex, broad, with well-arched lateral borders ; 

 its length in both sexes is three-fourths its greatest breadth, its depth is half 

 its length. 



Cervical groove broad, deep, running to the lateral epibranchial tooth, but 

 not dividing it from the post-orbital crest. All the regions are distinct, as is 

 the mesogastric furrow, but there is no other areolation. There are a few 

 short, oblique, indistinct wrinkles or tubercles inside the lateral borders, but 

 otherwise the carapace is smooth to the naked eye ; the said wrinkles are most 

 distinct posteriorly, and may be absent anteriorly. 



Front in the adult one-fourth the greatest breadth of the carapace, much 

 deflexed, its sides convergent, its edge smooth and broadly bilobed. 



Outer orbital angle broad, depressed, not dentiform, not separated from 

 the lower border of the orbit by a gap. 



Antero-lateral borders of carapace well arched, distinct, but hardly crest- 

 like, bluntly and feebly crenulate ; lateral epibranchial tooth quite feeble or 

 obsolete, being formed by the junction with the post- orbital crest. 



The epigastric and post-orbital crests form, on either side of the meso- 

 gastric furrow, one unbroken crest, which runs into what there is of a lateral 

 epibranchial tooth ; the epigastric portions of the crest are broad and blunt, and 

 only the outer half of the post-orbital portions is at all sharp ; the inner portion 

 of the post- orbital crests is sometimes so blunt as to suggest a break between 

 them and the epigastric crests. 



The mouth-parts conform entirely to the description given for P. 

 jacquemontii. 



