338 Porocephalus pomeroyi n. sp. 
opisthosoma. In the type specimen the entire length of the body is 64 mm. 
The prosoma is elongated (8 mm. in the type-specimen), being one-eighth the 
length of the entire animal, and sac-shaped, with a maximum diameter 
(3 mm.) at least twice that of the opisthosoma posterior to the first two annuli. 
The “neck" is nearly equal in length (7 mm.) to the prosoma and in breadth 
Text-figure 1. A Female specimen of Porocephalus pomeroyi, sp. n. ( x 3.) 
A' Anterior end of prosoma of the same specimen viewed ventrally. ( x cir. 27.) 
A" Hook of the same specimen. ( x 80.) 
B Small male specimen of Porocephalus {pomeroyi?). ( x 3.) 
B' Hook of the small male Porocephalus. ( x 80.) 
C Shipley s figure of P. annulatus. ( x 4.) In Shipley’s figure of this species in 
the Cambridge Natural History the prosoma is shown as being slightly more 
elongated. s J 
I am indebted to Mr E. Schwarz Lenoir, artist to the Wellcome Bureau, for figures A and B. 
(0*8 mm.) but little more than half the diameter of the hind portion of the 
opisthosoma. The opisthosoma in the type-specimen consists of 32 annuli, 
including the terminal or anal “segment. The first annulus is much the 
largest, exceeding in diameter the prosoma, and in length all the succeeding 
annuli. The second annulus is about two-thirds the diameter of the first 
