1912. ] N. ANNANDALE: Fauna Symbiotica Indica, 4. 244 
Fam. SCUTARIELLIDAE, nov. 
The two species included in this family are both minute, 
flattened, more or less ovoid or shield-shaped organisms associated 
with little freshwater prawns of the family Atyidae. They differ 
from all other known Temnocephaloidea in the following 
characters :— 
(1) There are only two anterior tentacles, which differ in 
structure and function from those of Temnocephala. 
(2) The posterior sucker is cleft anteriorly in such a way that 
it becomes either heart-shaped or horseshoe-shaped. 
(3) There are no external cilia on any part of the body. 
(4) The alimentary canal extends backwards to the posterior 
extremity. 
(5) The genital organs lie beneath instead of behind the 
alimentary canal and the genital pore is situated in the 
middle of the ventral surface. 
In the absence of lateral tentacles the Scutariellidae agree 
with the Temnocephalidae but they resemble A ctinodactylella, Max- 
well (7, 8) in the absence of pulsating excretory pouches and in 
the arrangement of the genital organs. The external! cuticle is 
minutely ringed. 
CARIDINICOLA, gen. nov. 
The mouth is almost precisely terminal and the whole pharynx 
can be extruded in the form of a proboscis. The tentacles arise 
on the dorsal surface, one on either side of the mouth. At the 
base of each tentacle, on the ventral surface, there is a small 
sucker. The posterior sucker is horseshoe-shaped. The excretory 
system opens on either side by a pore on the lateral margin almost 
on a level with the eyes. There are two testes on either side, a 
larger and more conspicuous external and anterior testis and a 
smaller inner and internal one. The penis is armed with chitin 
and directed from right to left; the ovary resembles that of 
Temnocephala in structure and lies a little to the left of the middle 
line; the vitellarium does not cover the dorsal surface of the 
alimentary canal. Each tentacle has a large ganglion at its base. 
An elongated gland runs along each side of the anterior part of 
the body towards the tip of the tentacle. 
Type, Caridinicola indica, nov. 
Distribution.—The Ganges and the Mahanaddi rivers, eastern 
India.! 
CARIDINICOLA INDICA, Sp. nov. 
External chavacters.—The animal is highly contractile and 
almost protean in form, but is always flattened dorso-ventrally, 
more or less produced at the anterior end and truncate posteriorly. 
! Since this was written Mr. Gravely has obtained specimens of Caridinicola 
on Cartdina sumatrensis in the Western Ghats. 
